WO2004108192A1 - 薬液供給制御方法、その方法に使用する薬液供給制御装置及びその装置を用いた薬液投与セット - Google Patents
薬液供給制御方法、その方法に使用する薬液供給制御装置及びその装置を用いた薬液投与セット Download PDFInfo
- Publication number
- WO2004108192A1 WO2004108192A1 PCT/JP2004/007503 JP2004007503W WO2004108192A1 WO 2004108192 A1 WO2004108192 A1 WO 2004108192A1 JP 2004007503 W JP2004007503 W JP 2004007503W WO 2004108192 A1 WO2004108192 A1 WO 2004108192A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spool
- chemical liquid
- injection line
- chemical
- liquid supply
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/18—General characteristics of the apparatus with alarm
Definitions
- Chemical solution supply control method Chemical solution supply control method, chemical solution supply control device used in the method, and chemical solution administration set using the device
- the present invention relates to a drug solution supply control method, a drug solution supply control device used in the method, and a drug solution administration set using the device.
- a method of administering a drug solution to a patient by using a syringe includes connecting an injection needle that can be connected to a syringe tip, an indwelling needle already indwelled in a blood vessel, or a so-called injection line that extends a catheter force. There is a way to do that. At this time, there is a problem if a blood vessel is previously secured, that is, if the tip of the injection needle connected to the injection line is securely placed in the blood vessel.
- the gasket may be located near the open end of the syringe barrel, or may be subjected to high-pressure steam sterilization.
- the stopper may be inserted from the open end to prevent the gasket from coming off. In these cases, the plunger cannot be pulled due to the structure. For this reason, in the above, it is not possible to confirm the securing of blood vessels, and therefore, the above-mentioned problem caused by the lack of blood vessels may inevitably occur.
- the maximum infusion rate is determined for some types of drug solutions, but conventionally, when the injection speed of the drug solution is higher than the normal injection speed, the operator is required to set the maximum injection speed. In many cases, it is not possible to notify the patient or to stop the injection of the drug solution. Therefore, in the above case, the patient is burdened.
- a syringe or an injection line may be covered with a protective wall in order to prevent the practitioner from being exposed to radiation.
- the reflux cannot be visually confirmed.
- the problem to be solved is that "the patient who administers the drug solution is inside a CT scanner or an MRI scanner," or "the syringe that administers the drug solution is a prefilled syringe.” Or ⁇ when administering a drug solution via a catheter inserted deep inside the patient's body '' or ⁇ when administering radiopharmaceuticals, a syringe or In the case where the injection line is also covered with a protective wall, ”it means that it was not possible to easily detect whether blood vessels were secured or not.
- An object of the present invention is to provide a chemical solution supply control method that solves the above problems, a chemical solution supply control device used in the method, and a chemical solution administration set using the device.
- the features of the control method are as follows: ( a ) a housing interposed between the chemical solution supply means and the injection line; and (b) a slidably provided in the axial direction in the housing and the housing. (C) a chemical liquid supply stopping means for stopping the supply of the chemical liquid from the chemical liquid supply means to the injection line and / or an injection line from the chemical liquid supply means.
- the problem is to use a malfunction notification means for notifying a malfunction related to the supply of the drug solution to the system, and to activate the drug solution stop means and / or the malfunction notification means when the injection line is closed.
- the housing is provided with an opposing portion which is opposed to one end surface in the axial direction of the spool, and which is defined as an inflow portion for operation between the end surface and the end surface.
- the supply stopping means supplies the liquid medicine from the liquid supply means or the injection line to the inflow portion for operation, and slides the spool in the axial direction, thereby stopping the supply of the liquid medicine from the liquid supply means to the injection line.
- the operating means applies an operating force in the axial direction to the spool while the injection line is filled with the liquid.
- the spool slides and liquid in the injection line is sucked into the housing.
- the injection line is closed, the spool does not slide and the spool does not slide. The engagement between the pool and the operating means may be released.
- the liquid in the injection line may be sucked between the end face of the spool, which is opposite to the operation direction, and the housing.
- the chemical liquid supply control device is characterized by (a) a housing interposed between the chemical liquid supply means and the injection line, and (b) a slidably provided in the housing in the axial direction. And a spool for intermittently connecting the chemical liquid supply means and the injection line by sliding in the axial direction, and (c) a chemical liquid supply stop means and / or a malfunction notification means.
- a housing interposed between the chemical liquid supply means and the injection line
- a spool for intermittently connecting the chemical liquid supply means and the injection line by sliding in the axial direction
- a chemical liquid supply stop means and / or a malfunction notification means When the line is closed and when the pressure of Z or the drug solution is higher than the set pressure, it is a means to stop the supply of the drug solution from the drug solution supply means to the injection line, and the malfunction notification means is from the drug solution supply means to the injection line. In other words, it is a means of reporting a problem with
- the housing is provided with an opposing portion facing the one end surface in the axial direction of the spool, and an opposing portion between the end surface and the end surface is defined as an operation inflow portion. Is supplied to the inflow portion for operation, and the spool is slid in the axial direction.
- the housing has (a) a spool hole, (b) an inflow port through which the chemical solution from the chemical solution supply means flows into the spool hole, and (c) an outflow port through which the chemical solution in the spool hole flows out to the injection line.
- a spool is formed in the spool hole to connect the inflow port and the outflow port intermittently so as to be slidable in the axial direction, and when the pressure of the chemical solution rises when the inflow port and the outflow port are connected.
- the pressure may be provided with a chemical liquid supply stopping means for sliding the spool to cut off the connection between the inflow port and the outflow port.
- the spool has a pair of lands separated in the axial direction. The group between the lands may be a group connecting the inflow port and the outflow port, and the chemical solution supply stopping means may be formed in the spool to be a flow path for communicating the gnoreve and the operating inflow section. That.
- the chemical liquid supply stopping means is formed in the housing and serves as an inlet-side operation port for communicating the chemical liquid supply means with the inflow portion for operation.
- the inflow port may be used also as the inlet-side operation port.
- the chemical liquid supply stopping means is formed in the housing and serves as an outlet-side operation port for communicating the injection line with the inflow portion for operation.
- outflow port may be used also as the outlet-side operation port.
- the facing portion may be an auxiliary portion made of an elastic material.
- setting means for interrupting the connection between the drug solution supply means and the injection line may be provided.
- the setting pressure of the setting means may be adjustable.
- the housing has a spool operating means, and the housing has (a) a spool hole in which the spool is slidably provided in the axial direction, and (b) an inflow through which the chemical from the chemical solution supply means flows into the spool hole.
- a port (c) an outflow port that is connected to the inflow port intermittently by sliding the spool, and allows the drug solution in the spool hole to flow out to the injection line, and (d) a drug solution in the injection line for operation. It has an operation port that flows into the spool, and the two are detachably engaged between the spool and the operating means, and the operating force of the operating means is set when the spool is operated in the direction away from the facing part. An engagement means for releasing the engagement when the operating force is exceeded may be provided.
- the spool has a pair of lands which are spaced apart in the axial direction and are slidably provided in the spool direction in the axial direction, and between the lands is a gnorebe for connecting the inflow port and the outflow port.
- the spool is: (a) a pair of small-diameter lands provided in the spool hole so as to be slid in the axial direction by being spaced apart in the axial direction; and (b) the axial direction of the two small-diameter lands and the spool.
- both small-diameter lands and large-diameter lands may be provided separately.
- the spool may be provided with a notifying unit that projects to the outside of the housing and notifies the shut-off when the connection between the chemical solution supply unit and the injection line is cut off.
- the operating means includes (a) a lever pivotally supported by the housing and (b) a return panel for returning the lever after swinging to the original position, and the engaging means comprises (i) A circumferential groove formed in the spool, and (ii) an engaging groove formed in the lever and engaged with the circumferential groove so as to be removably engaged through elastic deformation.
- ⁇ ⁇ ⁇ may be present.
- the lever when the connection between the inflow port and the outflow port is cut off, the lever may be used as a notification unit for notifying the cutoff.
- the housing may be provided with a cylindrical injection line mounting portion surrounding the outflow port, and the injection line mounting portion may be provided with a luer lock adapter connected to the injection line.
- a housing is formed in (a) an axial direction in which a spool is slidably provided in an axial direction, and (b) a spool hole is formed in a side portion of a housing and a housing, and communicates with the spool hole.
- an outflow port connected to the injection line, wherein the spool is connected to (i) a chemical liquid supply means and communicates with an inflow portion for operation; and (ii) a side portion of the spool. It may have an inflow port which is formed and communicates with the communication passage and the spool hole, and is connected to the outflow port intermittently by sliding the spool.
- A a first member having a substantially cylindrical shape, a spool hole inside, a front end portion facing, and an inflow port formed in a side wall portion in a radial direction;
- It has a substantially cylindrical shape that opens in both axial directions, and has a second member having a connection portion on the base side and an injection line mounting portion on the front end connected to the injection line, and the connection portion is the first member.
- the inflow port is fixed to the member from the distal end side, and the inflow port is internally provided in the connection portion, and the inflow port may communicate with the injection line mounting portion via the gap between the first and second members.
- a luer lock adapter connected to the injection line may be provided at the injection line mounting part.
- the housing may be provided at a base end portion of the first member, and may have a lid for restricting sliding of the spool in the axial rearward direction.
- first and third lands are arranged in the axial direction on the outer peripheral portion of the spool from the distal end portion to the proximal end portion, and a connection between the inflow port and the outflow port is provided between the first and second lands.
- the connection between the 2nd and 3rd lands is always in communication with the inflow port, and when the inflow port is connected to the outflow port, the connection between the 2nd and 3rd lands.
- a fourth land is provided on the outer peripheral portion of the spool on a base side with respect to the third land, The distance between the third and fourth lands may be larger than the distance between the connection position and the blocking position of the spool.
- a through hole is formed in the spool in the axial direction, the base of the spool is a tip mounting portion on which the tip of the syringe is separably mounted, and the tip of the through hole is a communication passage.
- setting means for setting a value of an external force necessary for sliding of the spool may be provided. Further, a setting value of the setting means may be adjustable.
- the spool may be provided with a notifying portion that projects rearward in the axial direction of the housing when the connection between the inflow port and the outflow port is cut off, and notifies the above shutoff.
- a feature of the medical solution administration set of the present invention is that it has a chemical solution supply control device and a chemical solution supply means.
- the drug solution supply means may be a syringe for injection.
- the syringe for injection may be a syringe filled with a drug solution.
- the chemical solution supply means may be a drip bag.
- the infusion bag may be a bag filled with a chemical solution.
- the chemical supplied by the chemical supply means may be a contrast agent.
- the contrast agent may be an MRI contrast agent.
- the auxiliary portion made of the elastic material can assist the spool to slide to the blocking position.
- the operating force for sliding the spool is increased, so that the practitioner can more reliably recognize that the operating mechanism is being operated.
- the operator can easily recognize that the connection between the inflow port and the outflow port has been interrupted by visually recognizing the notification section or lever. S can.
- FIG. 1 is a sectional view showing a first embodiment of the present invention.
- FIG. 2 is an operation state diagram of FIG. 1.
- FIG. 3 is a sectional view showing a second embodiment of the present invention.
- FIG. 4 is an operation state diagram of FIG. 3.
- FIG. 5 is a sectional view showing a third embodiment of the present invention.
- FIG. 6 is an operation state diagram of the spool in FIG. 5.
- FIG. 7 is an operation state diagram of the setting mechanism of FIG. 5.
- FIG. 8 is a sectional view showing a fourth embodiment of the present invention.
- FIG. 9 is an operation state diagram of FIG.
- FIG. 10 is a sectional view showing a fifth embodiment of the present invention.
- FIG. 11 is an operation state diagram of FIG.
- FIG. 12 is a sectional view taken along line AA of FIG. 10.
- FIG. 13 is a sectional view showing a sixth embodiment of the present invention.
- FIG. 14 is an operation state diagram of FIG.
- FIG. 15 is a sectional view showing a seventh embodiment of the present invention.
- FIG. 16 is an operation state diagram of FIG.
- FIG. 17 is a front view showing an eighth embodiment of the present invention.
- FIG. 18 is a plan view of FIG.
- FIG. 19 is a bottom view of FIG. 17.
- FIG. 20 is a left side view of FIG. 17.
- FIG. 23 is an operation state diagram of FIG.
- FIG. 25 is a front sectional view showing a ninth embodiment of the present invention.
- FIG. 26 is an operation state diagram of FIG.
- FIG. 28 is a front sectional view showing a tenth embodiment of the present invention.
- FIG. 29 is a side view showing an eleventh embodiment of the present invention.
- FIG. 30 is an operational state diagram of FIG. 29.
- FIG. 31 is a sectional view taken along line BB of FIG. 29.
- FIG. 32 is a sectional view taken along line CC of FIG. 31.
- FIG. 33 is a sectional view taken along the line DD in FIG. 30.
- FIG. 34 is a longitudinal sectional view showing a twelfth embodiment of the present invention.
- FIG. 35 is a side view showing a thirteenth embodiment of the present invention.
- FIG. 36 is an operating state diagram of FIG.
- FIG. 37 is a sectional view taken along line E—E in FIG. 35.
- FIG. 38 is a sectional view taken along line F-F of FIG. 36, description of reference numerals
- the present invention provides a chemical supply control method capable of easily detecting whether or not a blood vessel is secured and preventing leakage of a chemical outside a blood vessel, a chemical supply control device used in the method, and a device using the chemical supply control device.
- a drug solution administration set is provided.
- the chemical liquid supply control device includes a chemical liquid supply unit (chemical liquid supply line) (not shown) and an injection line (not shown). It is interposed between and has a housing 1, a spool (gasket) 2, and the like.
- the drug solution supply means means a medical device for administering a drug solution into a blood vessel of a living body, and examples thereof include an injection syringe, an infusion bag, and an infusion bottle. It is not something to be done.
- the drug solution supply means includes a drug solution-filled syringe (prefilled syringe), a drug solution-filled bag, a drug solution-filled drip bottle, and the like, which are already filled with the drug solution.
- the drug solution is a solution, suspension, emulsion, or the like that is directly applied into the blood vessel of a living body through the skin or the like, and is a drug solution used for treatment or diagnosis of various diseases.
- Nutrient solution, saline or other medical solution but not limited to Les ,.
- Examples of the drug solution used for diagnosis of various diseases include contrast agents such as MRI contrast agents, X-ray contrast agents, and ultrasound contrast agents, and various diagnostic agents.
- injection line an injection needle that can be attached to a syringe tip, an indwelling needle already indwelled in a blood vessel, a line that extends the force of a catheter, or the like is used.
- injection also includes so-called “infusion” in which a large amount (100 ml or more) of a drug solution is administered for a long time.
- the housing 1 is made of plastic and has a main body 4 and a lid 5.
- the main body 4 is provided with a tubular (hollow) tubular portion (tubular portion) 7 which is disposed in the up-down direction and opens upward, and which will be described later on the right side from the middle part of the tubular portion 7 in the up-down direction.
- a cylindrical (hollow) chip mounting portion 8 protruding so as to surround the inflow port 12 and a left side from a vertical middle portion of the cylindrical portion 7 so as to surround an outflow port 13 described later.
- the provided cylindrical (hollow) injection line mounting portion 9 is integrally formed. Note that the tip mounting section 8 and the injection line mounting section 9 need not necessarily be aligned on the same straight line when viewed in plan, and may be installed at an angle in the circumferential direction of the cylindrical section 7. Les ,.
- the inside of the tubular portion 7 is a spool hole 10 having a vertical axis and opening upward, and the bottom of the tubular portion 7 is a facing portion 11 facing the lower end surface of the spool 2. I have.
- the tip mounting part 8 has a syringe (not shown) detachably mounted therein and has a three-way stopcock function (three-way stopcock).
- the tip mounting part 8 opens at the right end and has a cylindrical part 7.
- the inflow port 12 allows the chemical from the chemical supply means to flow into the spool hole 10 via the tip mounting portion 8.
- a method of attaching a three-way cock (not shown) that can arbitrarily change the flow path of two or more kinds of chemicals to the tip mounting part 8 and a method of mounting the tip
- a method in which the part 8 itself is a three-way cock is a three-way cock.
- the reason why the tip mounting section 8 is provided with the three-way cock function is as follows. That is, even if the drug is successfully administered intravascularly (in most cases, it is administered without problems), serious allergic reactions such as a decrease in blood pressure may occur with the drug. In such a case, a quick response is required. In this case, if blood vessels are secured by the three-way cock function as in the present invention, it becomes possible to quickly perform emergency treatment by administration of various drugs such as steroids. [0026] The above allergic reaction may occur during the infusion of the drug solution, or may occur shortly after administration, so it is considered that it is desirable to perform the test using the three-way cock function. In addition, the role of the drug solution remaining on the administration line as a flush is important from the viewpoint of securing an appropriate dose when the amount of the drug solution to be administered is small.
- the connecting portion of the chemical liquid supply means with the chip mounting portion 8 has a chip or a portion corresponding to the chip.
- a tip or a portion corresponding to the tip may be provided between the chemical solution supply means and the tip mounting portion 8 to mount a catheter or the like.
- the injection line mounting section 9 is provided with an injection line (not shown) detachably mounted, is disposed below the tip mounting section 8, is opened at the left end, and has a cylindrical section 7.
- the outflow port 13 allows the drug solution in the spool hole 10 to flow out to the injection line mounting section 9, and is disposed below the inflow port 12.
- a lock mechanism such as a Nore lock adapter is provided in the injection line mounting portion 9 so that the injection line and the injection line mounting portion 9 do not accidentally come off when the injection pressure of the drug solution is high.
- a catheter, an injection needle, an indwelling needle, and the like are connected to the injection line mounting section 9.
- the lid 5 is externally fitted to and fixed to the upper end of the cylindrical portion 7, and covers the upper end opening of the cylindrical portion 7.
- An opening 15 is formed at the center of the lid so as to penetrate vertically. Have been.
- the spool 2 is slidably provided in the spool hole 10 in the vertical direction (axial direction). As shown in FIG. 1, the lower end surface of the spool 2 comes into contact with the facing portion 11 of the housing 1 and As shown in FIG. 2, the connection position for connecting the inflow port 12 and the outflow port 13 and, as shown in FIG. 2, a position higher than the connection position and a blocking position for blocking the connection can be freely changed. It is communicated to part 15.
- the constituent material of the spool 2 is not particularly limited as long as it is an elastic member that has been used as a power medical device using plastic, thermoplastic elastomer, silicon elastomer, butyl rubber, or the like.
- the spool 2 includes a lower land 17, a small-diameter portion 18 having a diameter smaller than that of the lower land 17, an upper land 19 having substantially the same diameter as the lower land 17, and both lands 17. Notice that the diameter was smaller than 19
- the part 20 is configured by being connected upward (integrally formed) in the above order.
- the small diameter portion 18 may have the same diameter as the lands 17 and 19.
- the lower end surface of the lower land 17 is opposed to the opposing portion 11 of the housing 1 in the up-down direction, and when the force spool 2 having the actuation inflow portion 21 between the two is in the connection position, the spool is in the connected position.
- the lower end surface of 2 is in contact with the facing portion 11.
- the upper and lower ends of the outer periphery of the lower land 17 and the lower end of the upper land 19 are provided with seal portions 2224 that abut (press) against the inner surface of the spool hole 10 to prevent liquid leakage.
- the spool 2 can be held at an arbitrary sliding position.
- an external force greater than the external force at the start of sliding (set external force) acts on the spool 2 in the vertical direction, Spool 2 is slidable. That is, the seal portion 2224 also has a function as a setting means for determining the above-mentioned external force at which the sliding starts.
- the seal portion 2224 may be usually formed of a seal member which is formed integrally with the spool 2 and is formed as a force.
- the outflow port 13 is located between the upper and lower seal portions 23 and 22 of the lower land 17 when the spool 2 is at the shut-off position.
- a gnoreve (circumferential groove) 25 is formed between the lands 17 and 19 separated from each other in the axial direction, that is, the radially outer side of the small-diameter portion 18, and is always in communication with the inflow port 12. However, it communicates with the outflow port 13 only when the spool 2 is in the connection position.
- the lower part of the small diameter portion 18 and the lower land 17 are provided with a chemical liquid supply stopping means (blocking means).
- a chemical liquid supply stopping means blocking means. This means, when the inflow port 12 and the outflow port 13 are connected to each other, when the pressure of the chemical solution exceeds the set pressure (abnormal pressure), the spool 2 is slid by the pressure of the chemical solution, and the inflow port 12 Since the supply of the chemical solution is stopped by disconnecting the connection between the outlet port 13 and the outlet port 13, it is specifically constituted by a flow path 26 which is a bypass.
- the chemical liquid supply stopping means may include the inflow section 21 for operation.
- the flow path 26 connects the group 25 and the inflow section 21 for operation, and includes a vertical hole 27 and a horizontal hole 28.
- the vertical hole 27 is formed in the lower center portion of the lower land 17 and the lower axial portion of the small-diameter portion 18 and opens downward at the lower end.
- the horizontal hole 28 is formed in the lower part of the small diameter portion 18 in the front-rear direction.
- the center part in the front-rear direction communicates with the upper end of the vertical hole 27, and both front and rear ends are opened in the front-rear direction. Note that only one of the front and rear ends of the horizontal hole 28 may be open.
- the normal injection pressure equal to or lower than the set injection pressure of the drug solution, that is, the normal injection pressure of the drug solution due to the gauge of the syringe needle, the cross-sectional area of the syringe, etc. at the time of injection.
- An upward external force acts on the spool 2 due to an increase in pressure, for example, an increase in the pressure of the chemical solution at the initial stage of sliding of the plunger of the syringe, or an increase in the pressure of the chemical solution due to a normal injection speed of the chemical solution.
- the external force at the start of sliding of the spool 2 is larger than that of the spool 2.
- a large abnormal injection pressure higher than the set injection pressure of the drug solution is applied to the spool 2 in the upward direction. It acts as an external force, but the external force at which the spool 2 starts sliding is smaller than this external force. That is, the sliding start external force is set to be larger than the normal external force acting on the spoonle 2 at the time of injection so that the spool 2 does not slide unexpectedly. Is considered small.
- the upper surface of the upper land 19 contacts the lower end surface of the lid 5 when the spool 2 is at the blocking position.
- the notification unit 20 constitutes a failure notification unit that reports a failure related to the supply of the chemical solution from the chemical solution supply unit to the injection line. When the chemical solution supply stop unit operates, the notification unit 20 reports this operation.
- the notification unit 20 protrudes slightly upward from the housing 1 when the spool 2 is at the connection position (it may not be protruded), and largely protrudes from the housing 1 when the spool 2 is at the shut-off position.
- the notification unit 20 is usually colored to ensure the visual recognition of the notification unit 20.
- the sliding of the spool 2 or the operation of the notification section 20 accompanying the sliding can be changed into an electric, optical or acoustic signal to be notified.
- Means for notifying by changing to an electric, optical or acoustic signal include a bell, a light bulb, a light emitting diode, a buzzer, a sound emitting plate, and the like.
- an injection needle attachable to the tip of a syringe, an indwelling needle already indwelled in a blood vessel, or an injection line extending the catheter force is attached to the injection line attachment portion 9.
- a tip of a syringe filled with a drug solution is mounted on the tip mounting section 8 as a drug solution supply means.
- the spool 2 is at the connection position shown in FIG. 1, and the inflow port 12 and the outflow port 13 are connected by the group 25.
- the plunger of the syringe Prior to injection, first, the plunger of the syringe is pressed, and the flow path to the patient, After filling the inside of the syringe mounting part 8, spool hole 10, injection line mounting part 9, and injection line with a drug solution and removing the air inside the so-called "priming", the injection needle of the injection line is moved to the patient. Puncture the blood vessels.
- the case where the above priming is performed with a physiological saline is also used.
- the spool 2 is held at the connection position as described below, so that the drug solution flows into the blood vessel and performs the usual injection. .
- the normal injection pressure of the set injection pressure of the liquid medicine or less that is, the normal pressure of the liquid medicine due to the gauge of the needle of the syringe, the cross-sectional area of the syringe, etc. at the time of injection.
- An upward external force acts on the lower end surface of the spool 2 due to a rise, for example, a rise in the pressure of the chemical solution at the initial stage of sliding of the plunger of the syringe, or an increase in the pressure of the chemical solution due to a normal injection speed of the chemical solution.
- the sliding start external force of the spool 2 is set to be larger than this external force, there is no possibility that the spool 2 may slide unexpectedly.
- the spool 2 slides upward, and the drug solution of the syringe continues to flow into the working inflow section 21 through the tip mounting section 8 and the outflow port 13, and the spool 2 is moved upward. 2, the connection between the inflow port 12 and the outflow port 13 is cut off, and the notification unit 20 protrudes greatly from the housing 1.
- the plunger of the syringe cannot be pressed, and the drug solution is not forcibly injected into a portion that is not a necessary portion, so that the patient may not feel significant pain.
- the patient will be able to smoothly receive the required medical treatment, It is possible to prevent additional medical activities such as medical treatment due to leakage to the outside, and it is expected that medical economics will be more efficient.
- the practitioner can easily know the above-mentioned abnormality, that is, that no blood vessel is secured, at the hand side. Since the notification unit 20 protrudes greatly from the housing 1, the practitioner can easily visually recognize the notification unit, and thereby can easily know at hand that a blood vessel is not secured.
- the chemical solution in the tip mounting portion 8 and the like can be returned to the syringe.
- the chemical solution can be prevented from being wasted, and an increase in medical costs can be prevented. it can.
- the pressure of the chemical solution in the inflow portion 21 for operation may drop, and the spool 2 may return to the connection position.
- the notification unit 20 may be pressed downward to return the spool 2 to the connection position.
- the chemical solution is also injected at a speed higher than the normal injection speed as described below. There is nothing. That is, when the injection speed of the drug solution becomes faster than the normal injection speed after the initial stage of the injection, a large abnormal injection pressure equal to or higher than the set injection pressure of the drug solution is applied to the spool 2 via the flow path 26 as described above. The upward external force acting on the lower end surface and acting on the spool 2 is equal to or greater than the external force at which the sliding starts. As a result, the spool 2 is in the shut-off position, and the injection of the chemical liquid cannot be performed.
- the notification unit 20 notifies the user of this. Can be easily found at hand. Therefore, after returning the spool 2 to the connection position, the practitioner presses the plunger of the syringe at a slower speed than before, and injects the liquid medicine at the normal liquid injection speed.
- FIGS. 3 and 4 show a second embodiment of the present invention, in which an upper seal portion 31 is provided at the upper end of the upper land 19 of the spool 2. , 31 is greater than the distance between the connecting position and the closing position of the spool 2. Thereby, the sliding area of the lower seal portion 24 on the inner surface of the spool hole 10 is protected from contamination by the outside air, and the risk of chemical liquid contamination is reduced.
- FIGS. 5 to 7 show a third embodiment of the present invention, in which a setting mechanism (means) 33 for setting an external force at which the spool 2 starts sliding is provided, and is configured as follows. .
- a circumferential projection 34 protruding outward in the radial direction is formed at an intermediate portion of the notification section 20 of the spool 2 in the axial center direction.
- An adjusting cylinder 35 externally fitted to the upper part of the notification section 20 of the spool 2 is externally fitted and fixed to the upper end of the cylindrical section 7 of the housing 1.
- the adjusting cylinder 35 is integrally formed of a material that can be elastically deformed, and a tapered screw portion 36 that is tapered upward is formed on an outer peripheral surface of a lower portion thereof. Also, in the axial center part of the inner peripheral surface of the adjustment cylinder 35, A circumferential projection 37 protruding radially inward is formed, and the circumferential projection 37 is disposed above the circumferential projection 34 of the spool 2.
- a slit 45 penetrating in the radial direction is provided in a portion extending from the upper end of the adjusting cylinder 35 to the lower end of the peripheral projection 34.
- the constituent material of the adjusting cylinder 35 the same material as that of the spool 2 is used.
- the cover 5 is externally fitted to the adjusting cylinder, and the female screw portion 38 on the inner periphery thereof is screwed to the tapered screw portion 36. As shown in FIGS. 5 and 7, the adjustment of the cover 5 is performed. By the screw advance / retreat with respect to the cylinder 35, the slit 45 of the adjustment cylinder 35 expands and contracts in the circumferential direction, and the inner diameter of the peripheral projection 37 expands and contracts. It is to be noted that a normal screw portion that is not connected to the tapered screw portion 36 may be formed in the adjustment cylinder 35, and a tapered screw portion may be formed in the lid 5.
- FIG. 8 and FIG. 9 show a fourth embodiment of the present invention, in which a housing 1 has a main body 4, an injection line mounting body 39, a lid 5, and the like.
- the inflow port 12 is formed at the lower portion of the cylindrical portion 7, and as shown in Fig. 8, when the spool 2 is in the connection position, the force for communicating with the group 25 of the spool 2 as shown in Fig. 9 When the spool 2 is in the shut-off position, it communicates with the operating inlet 21.
- the outflow port 13 is higher than the inflow port 12 and is always in communication with the group 25 of the spool 2.
- An inlet-side operation port 40 located below the inflow port 12 is formed in the cylindrical portion 7 so as to penetrate in the left-right direction, and communicates the tip mounting portion 8 and the operation inflow portion 21.
- the injection line mounting body 39 can be arranged at substantially the same position as the tip mounting portion 8 in the vertical direction, is fixed to the left side surface of the cylindrical portion 7, and has a vertical direction between them.
- a communication channel 41 is formed, the communication channel 41 communicates with the outflow port 13, and a communication hole 42 communicating with the communication channel 41 and the inside of the injection line mounting body 39 is provided at the right end of the injection line mounting body 39. It is formed to penetrate in the left-right direction.
- the length of the lower land 17 of the spool 2 in the axial direction is small.
- a plurality of the seal portions 43 may be provided, but in order to increase the sealing performance, the spool portions are preferably single, and a projection 44 is formed on the lower end surface of the spool 2 to be in contact with the facing portion 11. When the spool 2 is in the connection position, most of the lower end surface of the spool 2 is separated from the facing portion 11.
- the drug solution in the tip mounting section 8 firstly flows through the inlet-side operation port 40 through the operation inflow section 21. And the spool 2 starts sliding upward. Thereafter, the communication between the inflow port 12 and the group 25 of the spoonhole 2 is cut off, the inflow port 12 also communicates with the operating inflow section 21, and the chemical solution flows from the inflow port 12 into the operating inflow section 21. As a result, the spool 2 slides to the predetermined blocking position shown in FIG.
- FIGS. 10 to 12 show a fifth embodiment of the present invention, in which the tip mounting section 8 and the injection line mounting section 9, the inflow port 12 and the outflow port 13 are arranged in the up-down direction (substantially). ) The same position.
- longitudinal seal portions 46 in the axial direction are arranged at equal intervals in the circumferential direction between the upper and lower seal portions 23 and 22 of the lower land 17, and a plurality of partitions are provided between the upper and lower seal portions 23 and 22.
- FIGS. 13 and 14 show a sixth embodiment of the present invention.
- the housing 1 includes the main body 4, the injection line mounting body 39, the lid 5 and the like. However, only the differences will be described below.
- the inflow port 12 is formed in the middle part of the cylindrical portion 7 in the vertical direction, and is always in communication with the groove 25 of the spool 2.
- the outflow port 13 is formed on the lower side of the cylindrical portion 7 and is lower than the inflow port 12. As shown in FIG. 13, when the spool 2 is in the connection position, the group of the spool 2 Spool 2 shuts off as shown in Fig. 14 When in the position, it communicates with the actuation inlet 21.
- An outlet-side operation port 49 located below the outflow port 13 is formed through the cylindrical portion 7 in the left-right direction, and communicates with the inflow portion 21 for operation.
- a communication path 41 between the cylinder 7 and the injection line mounting body 39 communicates with the outflow port 13 and the outlet-side operation port 49.
- a main part, that is, a part (or all) of the facing part 11 of the housing 1 except for an outer peripheral part is an auxiliary body 50 made of an elastic material such as rubber.
- the drug solution in the injection line mounting body 39 firstly flows through the outlet side operation port 49 through the operation inflow section.
- the auxiliary body 50 flows into the inside 21 and is elastically deformed downward by the pressure of the chemical solution.
- the spool 2 slides upward due to the pressure of the chemical solution, so that the connection between the outflow port 13 and the group 25 is cut off, and the outflow port 13 communicates with the inflow section 21 for operation.
- the spool 2 slides further upward, and the spool 2 comes to a predetermined blocking position shown in FIG.
- FIGS. 15 and 16 show a seventh embodiment of the present invention, which is a modification of the first embodiment, and only the differences will be described below.
- the tip mounting section 8 is slightly higher than the injection line mounting section 9.
- the outflow port 13 is also used as an outlet-side operation port, and is formed at the lower end of the cylindrical portion 7 and is always in communication with the operation inflow portion 21.
- a main portion that is, a portion (or all) of the opposing portion 11 of the housing 1 except for the outer peripheral portion is an auxiliary body 50 made of an elastic material such as rubber.
- a projection 44 is formed on the lower end surface of the spool 2 so as to be in contact with the facing portion 11.
- the chemical solution flowing from the inflow port 12 into the group 25 of the spool 2 is attached to the injection line via the flow path 26, the inflow section 21 for operation, and the outflow port 13. Flows into part 9.
- the auxiliary body 50 is elastically deformed downward by the pressure of the chemical solution in the working inflow portion 21. Thereafter, the spool 2 slides upward due to the pressure of the chemical solution, and the communication between the inflow port 12 and the group 25 is cut off.
- Figs. 13 and 14 the force of separately providing the outflow port and the outlet-side operation port is used as shown in Figs. 11, 15, and 16. May be.
- Fig. 8 and Fig. 9 the inflow port and the inlet side operation port are provided separately.
- Fig. 1 Fig. 7, Fig. 10, Fig. 11, Fig. 13-Fig.
- the port can be shared.
- FIG. 17 to FIG. 24 show an eighth embodiment of the present invention.
- the chemical liquid supply control device has an operating means 3 in addition to the housing 1 and the spool 2. Although the main body 4 of the housing 1 is transparent, the lid 5 of the housing 1 may be transparent.
- the position of the spool 2 can be freely changed between a connection position shown in FIG. 22 and a shut-off position shown in FIG.
- the spool 2 includes a lower end portion 117, a lower land 118, an intermediate portion 119, an upper land 120, a stopper portion 121, a notification portion 122, and a shaft portion 123, which are directed upward in the above order. And is formed continuously (integrally formed).
- the upper and lower lands 120 and 118 have the same diameter, and the other parts of the spool 2 have smaller diameters.
- the lower end portion 117 and the lower end surface of the lower land 118 are opposed to the opposing portion 11 of the housing 1 in the up-down direction, and a space therebetween is defined as an operation inflow portion 124.
- the chemical liquid supply stopping means is constituted by the operating port 14, the chemical liquid supply stopping means may include the operating inflow portion 124.
- the seal portions on the outer periphery of the lower land 118 and the upper land 120 also have a function as setting means for determining the above-mentioned sliding start external force.
- these seal portions are usually constituted by a seal member which is formed integrally with the lower land 118 and the upper land 120 and is a force.
- a groove (circumferential groove) 125 is formed between the lower land 118 and the upper land 120, that is, the radially outer side of the intermediate portion 119, and the force that is always in communication with the inflow port 12 It communicates with port 13 only when spool 2 is in the connection position.
- the upper surface of the stopper portion 121 contacts the lower end surface of the lid 5 when the spool 2 is at the blocking position.
- the shaft portion 123 has a smaller diameter than the notification portion 122, and a ring portion 127 that protrudes radially outward in a curved shape is formed in the middle portion thereof over the entire circumference.
- a circumferential groove 128 is formed between 127 and the notification unit 122.
- the operating means 3 constitutes, together with the engaging means described later, a malfunction notifying means for notifying a malfunction relating to the supply of the medicinal solution from the medicinal solution supplying means to the injection line. This is separate from the malfunction notification means to be performed.
- the operating means 3 includes a support 130, a lever 131, and a return spring 132.
- the support 130 is formed integrally with the lid 5 of the housing 1, and a support 133 is erected on the support 130, and a pair of support shafts 134 project forward and backward from the support 133. Is established.
- the lever 131 has its middle part in the longitudinal direction placed on the support part 133 and is engaged with the support shaft 134 so as to be able to freely engage and disengage via elastic deformation. It is pivoted.
- the distal end of the lever 131 is formed as a bifurcated engagement portion 135, and the front and rear sides of the engagement portion 135 are engaged with the circumferential groove 128 of the spool so as to be freely detachable.
- the engagement means for releasably engaging the operating means 3 with the spool is constituted by the portion 135 and the circumferential groove 128.
- the set operation force is set to be larger than the external force at which the spool 2 starts sliding.
- the return panel 132 is for returning the lever 131 after swinging to its original position.
- the return panel 132 is integrally formed in a curved shape at the base of the lever 131, and is elastically interposed between the base of the lever 131 and the support 130. Thus, the base of the lever 131 is urged upward.
- an injection needle attachable to the tip of a syringe, an indwelling needle already indwelled in a blood vessel, or an injection line extending the catheter force is attached to the injection line attachment section 9,
- a tip of a syringe filled with a drug solution is mounted on the tip mounting section 8 as a drug solution supply means.
- the spool 2 is at the connection position shown in FIG. 22, and the inflow port 12 and the outflow port 13 are connected by the group 125.
- the plunger of the syringe Prior to injection, first, the plunger of the syringe is pressed, and the drug solution is injected into the flow path to the patient, that is, into the tip mounting portion 8, the spool hole 10, the injection line mounting portion 9, and the inside of the injection line. After filling and performing the so-called “priming” for removing the internal air, the injection needle of the injection line is punctured into the blood vessel of the patient. In addition, the case where the above priming is performed with a physiological saline is also used.
- the base of the lever 131 is pushed down, and an upward operating force is applied to the spool 2.
- the spool 2 slides upward, and the negative pressure generated due to this causes the chemical solution in the injection line to first move into the working inflow portion 124 through the working port 14. It flows into the working inlet 124 through the working port 14 and the outlet port 13.
- the operator moves upward, whereby the practitioner can easily know that the blood vessel is not secured.
- the base of the lever 131 tries to swing upward by the return panel 132, but the engaging portion 135 of the lever 131 comes into contact with the ring portion 127 of the spool 2 so as to come into contact. Therefore, the lever 131 does not return to the original position, and it can be visually confirmed from the position of the lever 131 that no blood vessel is secured.
- the patient does not forcibly inject the medicinal solution into a non-necessary location, and the patient does not feel any significant pain.
- the patient can smoothly receive the required medical treatment, and can prevent additional medical treatment such as treatment due to leakage of the drug solution out of the blood vessel. It is expected that the efficiency will also increase.
- the normal injection pressure equal to or lower than the set injection pressure of the drug solution, that is, the normal pressure increase of the drug solution due to the gauge of the syringe needle, the cross-sectional area of the syringe, etc. during injection, for example, the syringe Due to an increase in the chemical pressure at the initial stage of sliding of the plunger and an increase in the chemical pressure due to the regular injection speed of the chemical, an upward external force acts on the lower end surface of the spool 2 through the outlet-side operation port 14. . However, since the external force at which the spool 2 starts to slide is larger than this external force, there is no fear that the spool 2 will slide unexpectedly.
- the maximum injection rate of the liquid medicine is determined, but the liquid medicine is also injected at a speed higher than the normal injection speed as described below. There is nothing. That is, when the injection speed of the drug solution becomes faster than the normal injection speed, the drug solution in the injection line mounting portion 9 first flows into the working inflow portion 124 through the outlet-side working port 14, and the pressure of the drug solution is increased. Acts on the spool 2, and the upward external force acting on the spool 2 becomes equal to or greater than the external force at the start of sliding. As a result, as shown in FIG. 23, the spool 2 slides upward to be in the cut-off position, and the lever 131 swings, so that the injection of the medicinal solution cannot be performed.
- the notifying unit 122 and the swinging lever 131 that project greatly upward from the lid inform the user of this, the practitioner must make sure that the injection speed of the drug solution is higher than the normal injection speed. Can be easily known at hand. Therefore, after returning the spool 2 to the connection position by pressing the lever 131 or the spool 2, the practitioner presses the syringe plunger at a lower speed than before, so that the injection speed of the drug solution becomes the normal injection speed. Then, a chemical solution may be injected.
- FIG. 25 to FIG. 27 show a ninth embodiment of the present invention, in which the spool hole 10 of the housing 1 has a lower small-diameter portion 141 and an upper side where the diameter is larger than the small-diameter portion 141.
- Consisting of a large diameter part 142 of The spool 2 has a lower end portion 117, a lower small-diameter land 143, a lower intermediate portion 144, an upper small-diameter land 145, an upper intermediate portion 146, a large-diameter land 147, a notification portion 122, and a shaft portion. 12 3 are connected in an upward direction in the above order.
- the upper and lower lands 145 and 143 have the same diameter, and have a larger diameter than the lower end 117, the upper and lower intermediate portions 146 and 144, and the shaft 123, and the notification unit 122 has a larger diameter than these.
- the large diameter land 147 is the largest diameter.
- the upper and lower small lands 145, 143 are slidably provided in the small diameter portion 141, and the large lands 147 are slidably provided in the large diameter portion 142.
- the distance between the upper small-diameter lands 145 is larger than the distance between the connection position and the blocking position of the spool 2.
- the sliding area of the upper small-diameter land 145 on the inner surface of the spool hole 10 is protected from contamination by the outside air, and the possibility of contamination of the chemical solution is reduced.
- the large-diameter land 147 is also used as the stopper portion of the first embodiment.
- FIG. 28 shows a tenth embodiment of the present invention, in which a spool 2 is divided between an upper intermediate portion 146 and a large-diameter land 147, and is composed of a lower component 149 and an upper component 150. .
- the negative pressure acting on the lower end surface of the lower component 149 is equal to the area ratio of both lower end surfaces ((the area of the lower end surface of the large diameter land 147) Z (the lower end portion 117 of the spool 2 and the lower small diameter). Large area multiplied by the area of the lower end surfaces of both the land 143) or (the maximum cross-sectional area of the large-diameter land 147) Z (the maximum cross-sectional area of the lower small-diameter land 143) ”.
- the operating force for sliding the spool 2 upward is larger than in the case of the ninth embodiment, and the operator himself can operate the lever 131 more reliably than in the case of the ninth embodiment. I can recognize.
- FIGS. 29-33 show an eleventh embodiment of the present invention.
- the housing 1 is made of transparent plastic, and has first and second members 203 and 204 and a lid 205.
- the first member 203 has a bottomed cylindrical shape that opens rearward in the axial direction (front-rear direction), and its distal end is in contact with the distal end of the spool 2.
- An opposing portion 211 is formed, and the inside thereof is formed as a spool hole 210 in the axial direction.
- An outflow port 213 is formed in a side wall portion on the tip end side of the first member 203 in a radial direction, and the port 213 communicates with the spool hole 210.
- the second member 204 has a substantially cylindrical shape that opens in both axial directions, and has a connecting portion 214 on the base side and an injection line mounting portion 209 on the distal end side smaller in diameter than the connecting portion 214. And are integrally formed.
- the connection portion 214 is externally fitted and fixed to the first member 203 from the distal end side, and the outflow port 213 is included in the connection portion 214, and the outflow port 213 is connected to the first and second members 203 and 204. It communicates with the injection line mounting part 209 via the gap 215.
- the lid 205 restricts sliding of the spool 2 toward the rear side in the axial center direction.
- the lid 205 is externally fitted and fixed to the base end of the first member 203, and has an opening at the center thereof.
- the portion 217 is formed to penetrate in the up-down direction, and its inner peripheral portion projects radially inward from the first member 203.
- the spool 2 is inserted into the spool hole 210 from the rear in the axial direction, and is slidably provided in the spool hole 210 in the axial direction.
- the tip of the spool 2 contacts the opposing portion 211 of the first member 203.
- the position can be freely changed between a contacting position (see FIGS. 29 and 31) and a blocking position (see FIGS. 30 and 33) described later.
- the spoonlet 2 has a base portion 219 and a sealing member 222 provided at a distal end portion of the base portion 219.
- An operation inflow portion 221 is provided between the distal end portion of the spool 2 and the facing portion 211 of the first member 203. I have.
- the base portion 219 constitutes most of the spool 2, is substantially cylindrical, and has a through hole 224 formed in the axial direction.
- the distal end of the through hole 224 is formed as a communication passage 225, and is formed as an operation port 226 which is always in communication with the distal end force inflow portion 221 of the communication passage 225.
- a contact portion 229 projecting radially outward and located in front of the lid 205 in the axial direction is formed at an intermediate portion in the axial direction of the base portion 219. As shown in FIG.
- the portion 229 is in a position force S in contact with the front surface of the lid 205, and is in a blocking position of the spool 2.
- the base of the base part 219 is a tip mounting part 208, and is axially rearward from the lid 205. It protrudes greatly.
- the tip mounting section 208 is provided with a flange 227 that is screwed with a luer adapter provided in the chemical liquid supply means.
- a notification unit 220 is formed on the outer peripheral surface of the tip portion (or the tip portion and its vicinity) of the tip mounting portion.
- the notification unit 220 is located inside the housing 1 when the spool 2 is at the connection position, and protrudes axially rearward from the housing 1 when the spool 2 is at the blocking position.
- the sealing member 222 is externally fitted and fixed to the distal end portion of the base portion 219 via elastic deformation, and is housed in the spool hole 210.
- the sealing member 222 and the distal end portion of the base portion 219 An inflow port 212 that communicates with the communication passage 225 and the spool hole 210 and that is connected to the outflow port 213 intermittently by sliding of the spool 2 is formed through the side wall in the radial direction.
- first to fourth lands 241 to 244 are arranged in the axial direction from the distal end portion to the proximal end portion, and these outer peripheral portions serve as a seal portion.
- the inner surface of the spool hole 210 is slidably (pressed) in the liquid-tight state (air-tight state) so as to be slidable in the axial direction.
- the contact makes it possible to hold the spool 2 at an arbitrary sliding position, and an external force greater than the external force required for sliding the spool (sliding start external force, set external force) is applied.
- the spool 2 is slidable. That is, the seal portion on the outer periphery of the lands 241 to 244 also has a function as a setting means for determining the external force for starting the sliding.
- seal portions are usually formed integrally with the lands 241 to 244, but may be constituted by separate seal members.
- the first and second lands 241 and 242 form a blocking group 245 that communicates with the outflow port 213 when the connection between the inflow port 212 and the outflow port 213 is cut off.
- a connection group 246 is provided between the second and third lands 242, 243. The group 246 always communicates with the inflow port 212 and communicates with the outflow port 213 only when the inflow port 212 and the outflow port 213 are connected. Further, the distance between the third and fourth lands 243, 244 is larger than the distance between the connection position of the spool 2 and the blocking position.
- the distal end surface of the base portion 219 has a tapered surface 247 which is slightly tapered toward the rear in the axial center direction so that the communication passage 225 and the inflow portion 221 for operation can communicate well. Being done. Then, the communication passage 225 or the through-hole 224 and the communication passage 225 Although a liquid supply stopping means is configured, the chemical liquid supply stopping means may include an inflow portion 221 for operation.
- an injection needle attachable to the tip of a syringe, an indwelling needle already indwelled in a blood vessel, or an injection line extending the catheter force is attached to the injection line attachment portion 209.
- a tip of a syringe filled with a drug solution is mounted on the tip mounting section 208 as a drug solution supply means.
- the spool 2 is at the connection position shown in FIGS. 29 and 31, and the inflow port 212 and the outflow port 213 are connected by the connection gnoreve 36.
- the plunger of the syringe is depressed so that the flow path to the patient, that is, the through hole 224, the working inflow portion 221, the inflow port 212, the connection group 246, and the outflow port 2 13.
- the injection line mounting part 209 and the inside of the injection line with a drug solution to remove the air inside the so-called "priming"
- the injection needle is punctured into the patient's blood vessel.
- the priming may be performed using a physiological saline solution.
- the plunger of the syringe is pressed.
- the blood vessel is secured, that is, the injection needle of the injection line is punctured into the blood vessel, and the injection line is connected to the blood vessel.
- the spool 2 is held at the connection position as described below, so that the drug solution flows into the blood vessel and the injection can be performed as usual.
- the pressure of the medicinal solution acts from the communication passage 225 into the inflow portion 221 for operation, so that the normal injecting pressure equal to or lower than the set injecting pressure of the medicinal solution, that is, the gauge of the needle of the syringe at the time of injection,
- the normal pressure increase of the chemical due to the cross-sectional area of the syringe, etc. for example, the pressure increase of the chemical at the initial stage of sliding of the plunger of the syringe, and the pressure increase of the chemical due to the regular injection speed of the chemical, etc.
- An external force acts axially rearward on the surface. However, since the external force at which the spool 2 starts sliding is larger than this external force, there is no danger of the spool 2 sliding unexpectedly. As described above, injection can be performed as usual.
- a large abnormal injection pressure equal to or higher than the set injection pressure of the liquid acts on the distal end surface of the spool 2 via the communication passage 225 and the inflow portion 221 for operation, and the external force acting on the spool 2 in the axial rearward direction is slid. It becomes more than the external force at the start of movement.
- the spool 2 slides rearward in the axial direction, and continues to flow into the working inflow portion 221 via the chemical liquid communication passage 225 of the syringe.
- the spool 2 comes to the blocking position shown in FIGS. 30 and 33, the contact portion 229 contacts the lid 205, the outflow port 213 communicates with the blocking group 245, and the outflow port 213 flows out of the inflow port 212.
- the connection of the port 213 is interrupted, and the notification unit 220 projects from the housing 1 rearward in the axial center.
- the plunger of the syringe cannot be pressed, and the drug solution is not forcibly injected into a portion that is not a necessary portion, so that the patient may not feel significant pain.
- the patient can smoothly receive the required medical treatment, and can prevent additional medical treatment such as treatment due to leakage of the drug solution out of the blood vessel. It is expected that it can be improved.
- the practitioner can easily know the above-mentioned abnormality, that is, that the blood vessel is not secured, at the hand side. Since the notification unit 220 protrudes from the housing 1, the practitioner can easily visually recognize the notification unit, and also can easily know at hand that the blood vessel is not secured.
- the drug solution in the tip mounting portion 208 and the like can be returned into the syringe.
- the drug solution can be prevented from being wasted, thereby preventing an increase in medical costs. it can.
- the pressure of the chemical in the inflow portion 221 for operation may decrease, and the spool 2 may return to the connection position. By pressing the spool forward in the axial direction to return the spool 2 to the connection position.
- the drug solution in the operation inflow portion 221 can be returned to the syringe again.
- a syringe for administering a drug solution must In the case of a syringe filled with a drug solution (prefilled syringe) that often cannot pull the plunger, or in the case of administering a drug solution via a catheter inserted deep into the patient, or When administering radiopharmaceuticals, even if the syringe and injection line are covered with a protective wall to prevent exposure to the practitioner, even if the drug solution leaks out of the blood vessels, there is Can be performed.
- the chemical solution is injected at a speed higher than the normal injection speed. There is nothing. That is, if the injection speed of the drug solution becomes faster than the normal injection speed after the initial stage of the injection, as described above, a large abnormal injection pressure equal to or higher than the set injection pressure of the drug solution is generated by the communication passage 225 and the inflow portion 221 for operation.
- the external force acting on the distal end surface of the spool 2 through the shaft 2 and acting on the spool 2 in the axially rearward direction is equal to or greater than the external force at the start of sliding.
- the spool 2 is brought into the shut-off position, and it becomes impossible to inject the medicinal solution. Therefore, a large burden is not applied to the patient, and the notifying unit 220 informs the user of this. Can be easily found at hand. Therefore, after returning the spool 2 to the connection position, the practitioner presses the plunger of the syringe at a lower speed than before, and injects the medicinal solution at the normal injecting speed of the medicinal solution.
- FIG. 34 shows a twelfth embodiment of the present invention, which is provided with a setting mechanism (means) 233 for setting a value of an external force necessary for sliding of the spool 2, and is configured as follows.
- a peripheral projection 234 having a larger diameter than the base of the base portion 219 is formed at the tip of the tip mounting portion 208 of the spool 2.
- the base end of the first member 203 of the housing 1 is provided with an adjusting cylinder externally fitted to the base 219.
- Adjusting cylinder 235 is externally fitted and fixed. Adjusting cylinder 235 is integrally formed of elastically deformable material A tapered single thread portion 236 tapered upward is formed on the outer peripheral surface of the distal end portion. A circumferential projection 237 that is located axially rearward of the first member 203 and protrudes inward in the radial direction is formed integrally with a halfway portion of the inner circumferential surface of the adjusting cylinder 235 in the axial direction. 237 is disposed axially rearward of the circumferential projection 234 of the spool 2. Further, a slit (not shown) penetrating in the radial direction is provided in a portion extending from the base end of the adjusting cylinder 235 to the peripheral projection 234. As the constituent material of the adjusting cylinder 235, the same material as that of the spool 2 is used.
- the cover 205 is externally fitted to the adjusting cylinder 235, and the female screw portion 238 on the inner periphery thereof is screwed to the tapered screw portion 236.
- the slits 235 expand and contract in the circumferential direction, and the inner diameter of the circumferential projection 237 expands and contracts.
- the outer diameter of the peripheral projection 234 is set to be larger than this inner diameter.
- the outer diameter of the contact portion 229 of the base portion 219 is made larger than the inner diameter, so that the circumferential projection 237 serves as a stopper of the contact portion 229.
- the adjusting cylinder 235 may be formed with a normal screw portion that does not use the taper screw portion 236, and the lid 205 may be formed with a tapered screw portion.
- the peripheral protrusion 237 of the adjusting cylinder 235 and / or the peripheral protrusion 234 of the spool 2 are elastically deformed, and the periphery of the spool 2 is deformed.
- the projection 234 needs to pass through the inside of the peripheral projection 237 of the adjustment cylinder 235. Therefore, by expanding and contracting the inner diameter of the circumferential projection 237 of the adjusting cylinder 235, the external force required for the circumferential projection 234 of the spool 2 to pass through the inside of the circumferential projection 237 of the adjusting cylinder 235, that is, the external force at which the sliding starts, is automatically increased. Can be set for any reason.
- FIG. 35 to FIG. 38 show a thirteenth embodiment of the present invention, in which the connecting portion 214 of the second member 204 of the housing 1 is fitted over the entire first member 203. Further, the distal end of the base part 219 is fitted into the base of the sealing member 222 of the spool 2 via elastic deformation and integrated, and a through hole 224 is formed in the base part 219 and the sealing member 222. ing.
- the return operation of the spool from the shut-off position to the connection position is performed by manually operating the spool or by pulling the plunger of the syringe with the force S and the return.
- various panels such as a coil panel and a compressed air panel for pressing the spool forward in the axial direction, or other return means may be provided.
- the drug solution administration set includes a syringe filled with a drug solution as a drug solution supply means and the drug solution supply control device according to the present invention.
- the syringe is connected to the chemical liquid supply control device by screwing the luer lock adapter provided on the syringe with the flange of the tip mounting part of the chemical liquid supply control device; ) Connecting the injection line between the syringe and the drug supply control device and connecting the injection needle to the injection line mounting part of the drug solution supply control device; and (3) connecting the drug solution control device and the injection needle May be connected to an injection line.
- a drug solution is supplied to a drug solution supply means and a drug solution supply control device, and further into a catheter, an injection needle, an indwelling needle, a three-way cock (a three-way cock function), an extension tube, and other blood vessels of a living body.
- a drug solution supply means and a drug solution supply control device for controlling the drug concentration of a drug solution.
- the drug solution supply control method according to the present invention the drug solution supply control device used in the method, and the drug solution administration set using the device are provided as a method, a device, and a set for administering a drug solution to a patient. Useful.
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Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2005506750A JP4600280B2 (ja) | 2003-06-02 | 2004-06-01 | 薬液供給制御装置及びその装置を用いた薬液投与セット |
Applications Claiming Priority (6)
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JP2003156679 | 2003-06-02 | ||
JP2003-156679 | 2003-06-02 | ||
JP2003-329256 | 2003-09-22 | ||
JP2003329256 | 2003-09-22 | ||
JP2003-379558 | 2003-11-10 | ||
JP2003379558 | 2003-11-10 |
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PCT/JP2004/007503 WO2004108192A1 (ja) | 2003-06-02 | 2004-06-01 | 薬液供給制御方法、その方法に使用する薬液供給制御装置及びその装置を用いた薬液投与セット |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007229392A (ja) * | 2006-03-03 | 2007-09-13 | Nippon Sherwood Medical Industries Ltd | 液体混注具 |
JP2011516172A (ja) * | 2008-04-01 | 2011-05-26 | ユーコン・メディカル,リミテッド・ライアビリティ・カンパニー | 複式容器用流体移送装置 |
US8920356B2 (en) | 2002-04-10 | 2014-12-30 | Baxter International Inc. | Conductive polymer materials and applications thereof including monitoring and providing effective therapy |
US8920355B2 (en) | 2007-02-09 | 2014-12-30 | Baxter International Inc. | Acoustic access disconnection systems and methods |
US9138536B2 (en) | 2008-04-01 | 2015-09-22 | Gambro Lundia Ab | Apparatus and a method for monitoring a vascular access |
JP2016521189A (ja) * | 2013-05-16 | 2016-07-21 | サイファーム ソシエテ ア レスポンサビリテ リミテSciPharm S.a r.l. | 新規の能動緊急供給弁 |
US10155082B2 (en) | 2002-04-10 | 2018-12-18 | Baxter International Inc. | Enhanced signal detection for access disconnection systems |
US10463778B2 (en) | 2007-02-09 | 2019-11-05 | Baxter International Inc. | Blood treatment machine having electrical heartbeat analysis |
CN113350613A (zh) * | 2021-06-04 | 2021-09-07 | 北京泰杰伟业科技有限公司 | 药液控制装置及药液供给系统 |
JP2022500137A (ja) * | 2018-09-11 | 2022-01-04 | ベクトン・ディキンソン・アンド・カンパニーBecton, Dickinson And Company | カテーテルプライミング装置 |
JP7547460B2 (ja) | 2019-07-24 | 2024-09-09 | ジヴエッセ ソチエタ ぺル アチオーニ | 三方コネクタ |
Families Citing this family (1)
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KR101638139B1 (ko) * | 2014-06-25 | 2016-07-20 | 한국기계연구원 | 실린더 튜브형 수액주입용 선형유량조절장치 |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
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US8920356B2 (en) | 2002-04-10 | 2014-12-30 | Baxter International Inc. | Conductive polymer materials and applications thereof including monitoring and providing effective therapy |
US10155082B2 (en) | 2002-04-10 | 2018-12-18 | Baxter International Inc. | Enhanced signal detection for access disconnection systems |
JP2007229392A (ja) * | 2006-03-03 | 2007-09-13 | Nippon Sherwood Medical Industries Ltd | 液体混注具 |
US9352078B2 (en) | 2007-02-09 | 2016-05-31 | Baxter International Inc. | Electrical heartbeat access disconnection systems |
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US9089654B2 (en) | 2007-02-09 | 2015-07-28 | Baxter International Inc. | Acoustic access disconnection systems and methods |
US9138528B2 (en) | 2007-02-09 | 2015-09-22 | Baxter International Inc. | Acoustic access disconnection systems and methods |
US8920355B2 (en) | 2007-02-09 | 2014-12-30 | Baxter International Inc. | Acoustic access disconnection systems and methods |
US10463778B2 (en) | 2007-02-09 | 2019-11-05 | Baxter International Inc. | Blood treatment machine having electrical heartbeat analysis |
US9138536B2 (en) | 2008-04-01 | 2015-09-22 | Gambro Lundia Ab | Apparatus and a method for monitoring a vascular access |
JP2011516172A (ja) * | 2008-04-01 | 2011-05-26 | ユーコン・メディカル,リミテッド・ライアビリティ・カンパニー | 複式容器用流体移送装置 |
US8821436B2 (en) | 2008-04-01 | 2014-09-02 | Yukon Medical, Llc | Dual container fluid transfer device |
JP2016521189A (ja) * | 2013-05-16 | 2016-07-21 | サイファーム ソシエテ ア レスポンサビリテ リミテSciPharm S.a r.l. | 新規の能動緊急供給弁 |
JP2022500137A (ja) * | 2018-09-11 | 2022-01-04 | ベクトン・ディキンソン・アンド・カンパニーBecton, Dickinson And Company | カテーテルプライミング装置 |
US11724087B2 (en) | 2018-09-11 | 2023-08-15 | Becton, Dickinson And Company | Catheter priming devices, systems and methods |
JP7374182B2 (ja) | 2018-09-11 | 2023-11-06 | ベクトン・ディキンソン・アンド・カンパニー | カテーテルプライミング装置 |
JP7547460B2 (ja) | 2019-07-24 | 2024-09-09 | ジヴエッセ ソチエタ ぺル アチオーニ | 三方コネクタ |
CN113350613A (zh) * | 2021-06-04 | 2021-09-07 | 北京泰杰伟业科技有限公司 | 药液控制装置及药液供给系统 |
Also Published As
Publication number | Publication date |
---|---|
JP4600280B2 (ja) | 2010-12-15 |
JPWO2004108192A1 (ja) | 2006-07-20 |
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