WO2011033788A1 - 薬液注入装置および薬液注入方法 - Google Patents
薬液注入装置および薬液注入方法 Download PDFInfo
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- WO2011033788A1 WO2011033788A1 PCT/JP2010/005691 JP2010005691W WO2011033788A1 WO 2011033788 A1 WO2011033788 A1 WO 2011033788A1 JP 2010005691 W JP2010005691 W JP 2010005691W WO 2011033788 A1 WO2011033788 A1 WO 2011033788A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/2096—Combination of a vial and a syringe for transferring or mixing their contents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/20—Arrangements for transferring or mixing fluids, e.g. from vial to syringe
- A61J1/22—Arrangements for transferring or mixing fluids, e.g. from vial to syringe with means for metering the amount of fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J2200/00—General characteristics or adaptations
- A61J2200/70—Device provided with specific sensor or indicating means
- A61J2200/76—Device provided with specific sensor or indicating means for fluid level
Definitions
- the present invention relates to a chemical solution injection apparatus and a chemical solution injection method used when mixing a chemical solution such as an injection drug with a syringe or the like in the field of medicine or the like.
- FIG. 16 is a configuration diagram of the chemical injection device disclosed in Patent Document 1.
- the chemical injection device in FIG. 16 dissolves the powdery or granular drug 2 in the drug bottle 1 by injecting the solution 4 contained in any of the plurality of liquid bottles 3 into the drug bottle 1.
- Device. As shown in FIG. 16, the compressed gas is supplied by the compressed gas supply device 5 to the upper part of the solution 4 in the liquid bottle 3 through the injection needle 7 by the feeding pipe 6, and the solution 4 is sufficiently higher than the atmospheric pressure. By pushing with pressure, the solution 4 is injected into the medicine bottle 1 via the feeding pipe 8.
- An open / close cock 9 is arranged between the injection needle 7 of the liquid bottle 3 and the feeding pipe 6 and between the injection needle 7 of the medicine bottle 1 and the feeding pipe 8.
- the open / close cock 9 is normally closed, and only the used one of the open / close cocks 9 of the drug bottle 1 and the plurality of liquid bottles 3 is opened.
- FIG. 16 only the opening / closing cock 9 of the rightmost liquid bottle 3 and the opening / closing cock 9 of the medicine bottle 1 are opened, and the solution 4 is being injected into the medicine bottle 1.
- this configuration is intended to safely inject the solution 4 into the medicine bottle 1 semi-automatically using compressed gas without using human hands.
- the chemical liquid injector of FIG. 16 is configured to spray a compressed gas from the injection needle 7 onto the liquid surface of the solution 4. Therefore, when the liquid level of the solution 4 and the tip of the injection needle 7 are close to each other, the solution 4 is entrained in the compressed gas fed, and the solution 4 (chemical solution) is foamed. In order to prevent this, adjustment of the insertion amount of the injection needle 7 and adjustment of the inflow amount of the compressed gas are separately required. At this time, for example, if the flow rate of the compressed gas is reduced in order to suppress foaming of the solution 4, it takes time to inject the solution 4, resulting in poor working efficiency.
- the inside of the liquid bottle 3 (chemical solution container) containing the solution 4 (chemical solution) is always positive due to the pressure of the compressed gas. When it is opened, the solution 4 or the like may be blown out suddenly.
- the present invention solves the above-described conventional problems, and provides a chemical solution injection device and a chemical solution injection method capable of accurately and efficiently injecting a chemical solution in a chemical solution container into a syringe while suppressing foaming of the chemical solution.
- the purpose is to do.
- a chemical liquid injector is an injection port that receives a chemical liquid container, a holding port that holds a syringe, and an injection that passes through a needle base and communicates the receiving port and the holding port.
- a compound needle having a needle, and an adjustment needle penetrating the needle base from the side surface of the needle base to the receiving port and disposed in parallel with the injection needle at the receiving port; and Based on a fluid supply part that supplies fluid into the chemical solution container received in the receiving port via a supply pipe connected to an end on the side surface side, and a gasket position in the syringe held in the holding port Then, at least one of the filling amount and the filling speed of the chemical solution injected into the syringe from the chemical solution container through the injection needle by supplying the fluid from the fluid supply unit.
- a measuring unit for measuring a characterized by comprising a control unit for controlling the supply of fluid in the fluid supply unit based on the measurement result in the measurement unit.
- the liquid medicine injection method of the present invention includes a needle base, an injection needle that passes through the needle base and communicates the receiving port and the holding port, and penetrates the needle base from a side surface of the needle base to the receiving port.
- a liquid injection device including a compound needle having an adjustment needle arranged in parallel with the injection needle at the receiving port, holding a syringe at the holding port, and receiving a chemical container at the receiving port , After inserting the injection needle and the adjustment needle into the drug solution container, the tip of the adjustment needle is disposed above the drug solution surface of the vial container, and the tip position of the gasket of the syringe is measured, Based on the tip position of the gasket, the fluid supply unit supplies fluid from the end on the side of the adjustment needle into the chemical solution container, and the chemical solution in the chemical solution container is supplied from the injection needle to the chemical solution container. Injected into Nji, characterized in that.
- the chemical solution in the chemical solution container can be accurately and efficiently injected into the syringe while suppressing foaming of the chemical solution.
- FIG. 1 is a schematic side view showing an overall configuration of a chemical liquid injector according to a first embodiment of the present invention.
- the diagram which shows the drive pattern with respect to the time-axis of the flow control valve of Embodiment 1 of this invention (in the case of fixed quantity open drive).
- the diagram which shows the drive pattern with respect to the time-axis of the flow control valve of Embodiment 1 of this invention in the case of intermittent open drive.
- FIG. 1A and 1B show a schematic configuration of a chemical liquid injector 10 according to a first embodiment of the present invention
- FIG. 1A is a side view showing the overall configuration of the chemical injector 10
- FIG. 1B is an enlarged view of a flow rate controller 11. It is.
- a chemical liquid injection device 10 includes a compound needle 12 for injecting a chemical liquid, a pressure generating unit 13 that sends out compressed gas, and a flow rate control that controls the flow rate of compressed air.
- Unit 11 measuring unit 14 that measures the filling amount and filling speed of the chemical solution, and control unit 15.
- the control unit 15 controls the pressure generation unit 13, the flow rate control unit 11, and the measurement unit 14.
- the compound needle 12 has a needle base 12c, an injection needle 12d, and an adjustment needle 12e.
- the needle base 12c is made of an elastic material such as rubber or resin.
- an upper part of the needle base 12c is depressed to form a receiving port 12e for receiving a vial container 16 (medical solution container), and a lower part of the needle base 12c is depressed to form a holding port 12b for holding the syringe 17.
- the injection needle 12d is disposed through the needle base 12c from the receiving port 12a to the holding port 12b.
- the adjustment needle 12e passes through the needle base portion 12c from the side surface 12f of the needle base portion 12c to the receiving port 12a, and is disposed up to the receiving port 12a in parallel with the injection needle 12d.
- the wall surface of the receiving port 12a is in close contact with the opening side of the vial container 16 and the rubber stopper 51, so that the injection needle 12d and adjustment
- the inside of the vial container 16 is maintained in a sealed state except for the path passing through the needle 12e.
- the injection port side of the syringe 17 is arranged in the holding port 12b, the wall surface of the holding port 12b is in close contact with the injection port side of the syringe 17, so that the inside of the syringe 17 is maintained in a sealed state except for the path passing through the injection needle 12d. Is done.
- the pressure generating unit (fluid supply unit) 13 sends out compressed air as compressed gas to the vial container 16 through a tube (supply pipe) 18 connected to the end 12g of the adjusting needle 12e of the compound needle 12.
- the measuring unit 14 measures the filling amount and the filling speed of the chemical solution injected into the syringe 17 by measuring the tip position 17b of the gasket 17a in the syringe 17 held in the holding port 12b of the compound needle 12.
- the tip 12h of the adjustment needle 12e is arranged above the chemical surface 16a of the vial container 16 (outside the chemical solution), and compressed air is introduced into the vial container 16 from the tip 12h of the adjustment needle 12e.
- the compressed air introduced into the vial container 16 presses the liquid surface 16a downward.
- the drug solution 16b in the vial container 16 is injected into the syringe 17 via the injection needle 12d whose tip 12i is located in the drug solution 16b.
- Compressed air generated and sent out by the pressure generator 13 shown in FIG. 1A passes through the tube 18 and is introduced from the tip 12h of the adjustment needle 12e of the compound needle 12 toward the bottom 16c of the vial container 16, and then the drug solution The surface 16a is pressed.
- the tip 12h of the adjustment needle 12e protrudes upward from the chemical liquid surface 16a, and the compressed air is introduced upward toward the bottom 16c of the vial container 16, not toward the chemical liquid surface 16a. Therefore, the compressed air introduced into the vial container 16 does not entrain the drug solution 16b and does not cause the drug solution 16b to foam.
- the chemical liquid 16b is injected into the syringe 17 through the injection needle 12d arranged in the lower part of the liquid when the chemical liquid surface 16a in the upper part of the liquid is pressed downward by the compressed air. Part of the injected chemical liquid 16b pushes down the gasket 17a inside the syringe 17.
- the measuring unit 14 measures the filling amount of the liquid medicine into the syringe 17 by reading the tip position 17b of the gasket 17a inside the syringe 17 through the scale 17c of the syringe 17.
- the measurement unit 14 includes a measurement camera in which the entire travel of the gasket 17a is stored in the imaging field of view, and performs image processing on the images of the gasket 17a and the scale 17c captured by the measurement camera.
- the scale 17c at the tip position 17b of the gasket 17a is recognized.
- the measurement part 14 measures the filling amount of a chemical
- the filling amount (measured value) of the chemical solution measured by the measuring unit 14 is converted into an electric signal, for example, and sent to the control unit 15 and compared with the amount of chemical solution to be injected.
- the control unit 15 When the filling amount of the chemical solution in the syringe 17 measured by the measuring unit 14 does not reach the planned chemical solution amount, the control unit 15 continues to supply the compressed air from the pressure generating unit 13 and continues downward on the chemical liquid surface 16a. And the injection of the chemical solution 16b into the syringe 17 is continued. On the other hand, when the filling amount of the chemical solution in the syringe 17 measured by the measuring unit 14 has reached the planned chemical solution amount, the control unit 15 stops the supply of compressed air from the pressure generating unit 13 and the inside of the syringe 17 The injection of the medicinal solution 16b is terminated.
- prescription information such as a planned amount of medicinal solution and the type of medicinal solution
- prescription DB a prescription database
- the prescription information records the work contents of the injection of the drug solution 16b into the syringe 17 by the prescription DB 19.
- the chemical solution injector 10 can accurately and efficiently inject the drug solution 16b in the vial container 16 into the syringe 17 while suppressing foaming of the drug solution 16b.
- the chemical injection device 10 can arrange the vial container 16 and the syringe 17 above and below the needle base 12c. Furthermore, since the chemical injection device 10 directly measures and reads the tip position 17b of the gasket 17a through the scale 17c of the syringe 17 by the measuring unit 14, a compact device suitable for space saving can be realized.
- the measurement part 14 may measure the back end position (not shown) of the plunger 17d of the syringe 17 and read the filling amount etc. of the chemical
- the measurement unit 14 may directly measure the rear end position of the plunger 17d using, for example, a linear potentiometer. Thereby, the measurement part 14 does not need to image-process the image imaged with the measurement camera, and can improve the reading precision, such as the filling amount of the chemical solution 16b, and the controllability of the filling of the chemical solution 16b.
- the measurement unit 14 may measure the filling rate of the liquid medicine into the syringe 17 together with or instead of the filling amount into the syringe 17 and send it to the control unit 15. In this case, the measurement unit 14 measures the filling amounts at a plurality of different points in the syringe 17 and calculates the filling speed by calculating these.
- a measuring cylinder (not shown) may be arranged in the holding port 12b, and the drug solution 16b may be injected into the measuring cylinder.
- the liquid level of the chemical solution 16b filled in the measuring cylinder is detected by the measuring unit 14, and the detection result is fed back to the control unit 15 to control the injection amount of the chemical solution 16b.
- the flow control unit 11 changes the inflow amount of the compressed air by pushing a part of the tube 18 and changing the cross-sectional area of the inner diameter of the tube 18.
- the flow control unit 11 includes a flow control valve 11a, and can continuously change the inflow amount of compressed air by opening and closing the flow control valve 11a.
- the flow control valve 11a is driven to open and close as shown in FIG. 1B, for example, by a valve drive unit 11b using an electronic solenoid. If this function is utilized, the control part 15 can control the flow volume control part 11 according to the filling amount or filling speed of the chemical
- the filling speed of the chemical solution 16b can be reduced, so that an accurate amount of the chemical solution can be injected into the syringe 17. Further, with this configuration, it is possible to inject under conditions suitable for the physical properties (viscosity, etc.) of the chemical liquid 16b.
- a structure in which a bacteria prevention filter 18 a is disposed between the pressure generation unit 13 and the flow rate control unit 11 may be employed.
- bacteria and the like contained in the compressed air can be prevented from entering the inside of the vial container 16 through the tube 18, so that the chemical liquid is contaminated with bacteria when the chemical liquid 16b is injected from the vial container 16 into the syringe 17. Can be prevented.
- control unit 15 may be configured to inject the drug solution 16b of the vial container 16 into the syringe 17 based on the data (prescription information, drug information, etc.) of the prescription DB 19.
- the chemical liquid 16b can be accurately injected into the syringe 17 based on the application data for each patient and the type of the chemical liquid 16b.
- FIG. 2 is a flowchart of the chemical solution injection method according to the first embodiment of the present invention.
- FIG. 3 shows details of the chemical liquid injection step S4 in FIG. 2, and shows a specific chemical liquid injection flowchart of the chemical liquid injection method according to the first embodiment of the present invention.
- the chemical solution injection method of the first embodiment uses the above-described chemical solution injection device 10 (see FIG. 1), a syringe holding step S ⁇ b> 1, a container receiving step S ⁇ b> 2, and a measurement unit arranging step S ⁇ b> 3. And a chemical solution injection step S4.
- the syringe holding step S1 is a step of holding the syringe 17 in the holding port 12b of the needle base 12c of the compound needle 12. At this time, the gasket 17a of the syringe 17 is pushed to the upper part of the syringe by the plunger 17d so as to prevent excess air from entering the syringe 17.
- the vial container 16 is received in the receiving port 12a of the needle base portion 12c in an inverted state, and the tip 12i of the injection needle 12d and the tip 12h of the adjusting needle 12e are passed through the rubber stopper 51 to fill the vial.
- the tip 12h of the adjustment needle 12e is placed above the chemical liquid surface 16a of the vial container 16 (outside the chemical liquid) after being inserted into the container 16.
- an imager of the measurement unit 14, for example, a measurement camera is arranged.
- the measurement camera is arranged so that the tip position 17b of the gasket 17a inside the syringe 17 can be measured in comparison with the scale 17c of the syringe 17.
- the compressed air from the pressure generating unit 13 is sent into the vial container 16 from the tip 12h of the adjustment needle 12e, and the medicinal solution 16b in the vial container 16 is injected into the syringe 17 from the injection needle 12d. inject.
- This method can suppress the bubbling of the drug solution 16b in the vial container 16, and can realize an accurate and efficient injection of the drug solution 16b into the syringe 17.
- step S11 pressurization by the pressure generator 13 is performed for the purpose of supplying compressed air to the space above the medicinal solution surface 16a in the vial container 16 through the tube 18 and the adjusting needle 12e. Is started (step S11).
- step S12 the flow control valve 11a on the downstream side of the pressure generating unit 13 is in an “open” state, and the compressed air supplied from the pressure generating unit 13 into the vial container 16 through the tube 18 and the adjusting needle 12e.
- the chemical liquid surface 16a starts to be pressurized (step S12).
- the chemical liquid 16b starts to be injected into the syringe 17 held in the holding port 12b of the compound needle 12.
- the injection of the chemical solution 16b is performed, for example, until the designated chemical solution amount specified by the prescription from the prescription DB 19 is reached (step S13).
- step S14 when the injection of the chemical liquid 16b reaches the designated chemical liquid volume, the flow control valve 11a is in a “closed” state (step S14). Thereafter, the supply of compressed air by the pressure generator 13 is stopped, and pressurization is stopped (step S15).
- FIG. 4 shows a flowchart of another chemical solution injection method according to the first embodiment of the present invention.
- FIG. 5 shows details of the chemical liquid injection step S4 in FIG. 4, and shows a specific chemical liquid injection flowchart of another chemical liquid injection method according to the first embodiment of the present invention.
- another chemical solution injection method of the first embodiment uses the above-described chemical solution injection device 10 (see FIG. 1), a syringe holding step S ⁇ b> 1, a container receiving step S ⁇ b> 2, and a measurement unit arrangement.
- This is a method including step S3 and chemical injection step S4.
- the syringe holding step S1, the container receiving step S2, and the measuring unit arranging step S3 are the same as those in the medicine injecting method in FIG.
- the part including the opening step S4A and the intermittent driving step S4B in the chemical solution injection step S4 is different from the chemical solution injection method shown in FIG.
- the opening drive step S4A is a step in which the compressed air is sent from the pressure generating unit 13 with the flow rate control valve 11a of the flow rate control unit 11 opened.
- the intermittent drive step S4B is a step of operating the flow control valve 11a while alternately repeating the open state and the closed state. And in intermittent drive step S4B, according to the increase in the chemical
- steps S21 and S22 correspond to the opening drive step S4A of FIG. 4
- steps S23 to S29 correspond to the intermittent drive step S4B of FIG. 6A and 6B
- FIG. 6A shows the drive pattern in the case of the quantitative release drive
- FIG. 6B is a diagram showing a driving pattern in the case of intermittent open driving.
- step S11 immediately after the start, for the purpose of supplying compressed air to the space above the chemical surface 16a in the vial container 16, the tube 18 and the adjustment needle 12e are used. Pressurization by the pressure generator 13 is started (step S11). In the step close to the end, when the injection of the chemical solution 16b reaches the designated chemical solution amount or the final target value, the flow control valve 11a is in a “closed” state (step S14). Thereafter, the sending of the compressed air by the pressure generator 13 is stopped, and the pressurization is stopped (step S15).
- step S11 immediately after the start and steps S14 and S15 close to the end are the same as those in the chemical solution injection flowchart shown in FIG.
- the flow rate control valve 11a remains open until the chemical solution 16b is injected by the designated chemical amount, and is closed. It does not become a state. Thereby, when the injection speed is set relatively fast in order to complete the injection of the chemical liquid 16b in a short time, the chemical liquid 16b larger than the designated chemical liquid amount may be injected. In order to prevent such over-injection, for example, if a small amount of the chemical solution 16b is injected slowly over a long period of time, the working efficiency of the chemical solution injection step S4 is deteriorated.
- the chemical injection step S4 includes an opening drive step S4A and an intermittent drive step S4B. Specifically, in the chemical injection flowchart for preventing over-injection shown in FIG. 5, after the start of pressurization (step S11), the quantitative release drive is started (step S21).
- the open rate of the flow control valve 11a is set to 1 (the flow control valve 11a is fully opened), and compressed air is allowed to flow into the vial container 16.
- the opening rate of the flow rate control valve 11a is defined in the range of 0 to 1.
- the opening rate is 1, the flow rate control valve 11a is fully open, and when the opening rate is 0, the flow rate control valve 11a is Closed state.
- Quantitative release drive operation is continued, and when the amount of chemical in the syringe 17 reaches the first intermediate target value 1 (step S22), the constant release drive is stopped and intermittent release drive is started (step S23).
- the intermittent opening drive is performed with an opening time a in which the opening rate of the flow rate control valve 11a is 1 (the flow rate control valve 11a is in an open state) and an open rate 0 (the flow rate control valve 11a is in a closed state).
- the closing time b to be operated alternately and repeatedly.
- the amount of compressed air flowing from the pressure generator 13 into the vial container 16 is easily changed by changing the ratio of the opening time a and the closing time b by the opening / closing operation of the flow control valve 11a stepwise. be able to. That is, by periodically changing the duty ratio between the opening time a and the closing time b, the amount of compressed air flowing in per unit time can be changed to adjust the filling speed of the chemical liquid 16b injected into the syringe 17. .
- the ratio occupied by the closing time b (off duty ratio) is used as the duty ratio for the opening time a and the closing time b.
- the duty ratio in this case is defined by the following equation.
- step S27 Such intermittent release driving is repeated, and every time the chemical amount reaches the intermediate target value n (step S27), the duty ratio (off duty ratio) of the intermittent driving is gradually increased, for example, 0.7, 0,. It is changed to 8, 0.85, 0.9,... (Step S28).
- Step S28 Such an operation is performed until the amount of the chemical reaches the final target value (step S29), and when the final target value is reached, the flow control valve 11a is closed with the open rate 0 (step S14). Then, the operation of the pressure generating unit 13 is stopped and the pressurization is stopped (step S15).
- the flow rate control valve 11a substantially approaches the closed state by gradually increasing the duty ratio (off duty ratio) of the intermittent opening drive.
- the filling speed of the chemical solution 16b gradually decreases.
- FIG. 7 shows the change of the amount of the chemical solution with respect to time when the chemical amount of the final target value is injected into the syringe 17 by the chemical injection method including the intermittent drive step of the first embodiment.
- the flow rate control valve 11a is driven in a fixed release state by the release drive step S4A until the amount of the chemical solution reaches the intermediate target value 1 from 0. Then, the amount of the chemical solution reaches the intermediate target value 1 in the shortest time. Until the amount of the chemical solution reaches the intermediate target value 1 and reaches the final target value, the flow rate control valve 11a is driven in an intermittently opened state by the intermittent drive step S4B. That is, the duty ratio (off duty ratio) is gradually increased to drive in an intermittently open state.
- the chemical liquid 16b can be injected with high accuracy without causing excessive injection of the chemical liquid 16b into the syringe 17 due to the residual pressure of the compressed air. Further, since the injection to the intermediate target value 1 is performed in the shortest time, the chemical solution 16b can be injected efficiently and accurately in a short time.
- the flow rate control valve 11a is driven to be opened to the final target value only by the opening drive step S4A, over-injection due to the residual pressure in the vial container 16 occurs. In this case, the over-injected chemical solution 16b needs to be discarded later, which is inefficient.
- the chemical solution injection method according to the first embodiment it is possible to prevent the occurrence of inefficient work requiring the disposal of the chemical solution 16b.
- the flow rate control unit 11 of the chemical solution injection device 10 shown in FIG. 1 includes a flow rate control valve 11a that sets the open ratio of the inner diameter of the tube 18 to 1 or 0.
- the flow rate control valve 11a is controlled to periodically set the opening rate to 1 or 0 at a predetermined duty ratio.
- the opening rate is set to 1 until the filling amount of the chemical liquid 16b in the syringe 17 reaches a predetermined filling amount, and after the predetermined filling amount is exceeded, the opening rate becomes 0.
- the closing time is periodically inserted into the chemical injection process. At this time, the closing time is gradually increased stepwise until the filling amount of the chemical exceeds the predetermined filling amount and approaches the final filling amount.
- FIG. 8 is a side view showing a schematic configuration of the chemical liquid injector 20 according to the second embodiment of the present invention.
- the chemical injection device 20 of the second embodiment is similar to the chemical injection device 10 of the first embodiment, the compound needle 12 for chemical injection, the pressure generating unit 13 that sends out compressed gas, A flow rate control unit 11 that controls the flow rate of the compressed air, a measurement unit 14 that measures the filling amount and the filling speed of the chemical solution 16b, a pressure generation unit 13, and a control unit 15 that controls the flow rate control unit 11 and the measurement unit 14. It is equipped with.
- the tip 12h of the adjustment needle 12e is arranged above the liquid surface 16a of the vial container 16, and compressed air is introduced into the vial container 16 from the tip 12h of the adjustment needle 12e. Then, the compressed air presses the chemical liquid surface 16a downward, and can inject the chemical liquid 16b into the syringe 17 from the tip 12i of the injection needle 12d in the chemical liquid 16b.
- the chemical injection device 20 includes a syringe holding portion 23 having a barrel holding portion 21 and a plunger holding portion 22.
- the barrel holding part 21 holds the syringe 17 so that the position of the barrel 17f of the syringe 17 is fixed.
- the plunger holding portion 22 holds the plunger 17d that changes the position of the gasket 17a and slides in the direction of the central axis ⁇ of the barrel 17f together with the plunger 17d.
- the plunger holding part 22 includes a rod-like part 22a and gripping parts 22b and 22c that are provided on the lower end side of the rod-like part 22a and sandwich and hold the jaw part 17g of the plunger 17d. .
- the syringe holding part 23 is provided with the brake part 24 which locks the slide operation
- the brake unit 24 locks the slide operation
- a stopper 52 that locks the sliding operation by abutting the lower end side of the plunger holding portion 22 may be provided instead of the brake portion 24.
- the illustrated stopper 52 includes an abutting portion 52b against which the plunger holding portion 22 abuts at the lower end of the rod-shaped portion 51a.
- the bearing portion 51c of the rod-shaped portion 51a is supported by the support portion 52c so as to be slidable in the direction of the central axis ⁇ of the barrel 17f.
- the stopper 52 is moved in advance to the slide position corresponding to the specified chemical amount, and the stopper 52 is manually fixed by tightening the positioning screw 52d.
- the stopper 52 may be configured to automatically move based on the prescription data obtained from the prescription DB 19, or may be configured to abut against and engage with the rear end of the plunger 17d.
- a pressure gauge 25 is provided in the tube 18 between the flow control valve 11a and the adjustment needle 12e, and a detection signal for detecting the pressure of the gas above the liquid surface 16a of the vial container 16 is detected. Transmit to the control unit 15. Thereby, when the amount of the chemical injected into the syringe 17 approaches the final target value, the control unit 15 controls the flow rate control unit 11 and the pressure generation unit 13 based on the detection signal of the pressure value of the pressure gauge 25. Thus, the excessive injection of the chemical solution 16b can be prevented.
- the chemical injection device 20 of the second embodiment includes a pressure gauge 25 in a part of the tube 18 between the flow rate control unit 11 and the adjustment needle 12e. Based on the detection signal from the pressure gauge 25, at least one of the pressure generation unit 13, the flow rate control unit 11, and the syringe holding unit 23 is controlled by the control unit 15, and the chemical solution 16 b injected into the syringe 17. Adjust the filling amount. With this configuration, the pressure of the gas in the vial container 16 can be read directly, and the state of filling or injection of the drug solution 16b can be accurately grasped.
- FIG. 9 is a flowchart of the chemical solution injection method according to the second embodiment of the present invention.
- FIGS. 10 and 11 show details of the process in the chemical injection step (step S4) of the flowchart of FIG. 9, and show a specific chemical injection flowchart of the chemical injection method according to the second embodiment of the present invention.
- the chemical solution injection method of the second embodiment uses the above-described chemical solution injection device 20 (see FIG. 8), a syringe holding step S1, a container receiving step S2, and a measuring unit arranging step S3. And chemical
- Brake step S5 is a step in which the plunger holding part 22 is locked by the brake part 24 when it is measured by the measuring part 14 that the amount of the chemical solution designated in the syringe 17 is filled.
- a chemical solution injection method including a pressure release step S6 after the chemical solution injection step S4 may be employed.
- the pressure release step S6 is a step in which the pressure of the gas in the vial container 16 is reduced by the pressure generator 13 through the adjustment needle 12e, the tube 18 and the flow rate control valve 11a to below atmospheric pressure. It is.
- FIG. 10 shows a case where the pressure release step S6 is not executed
- FIG. 11 shows a case where the pressure release step S6 is executed.
- the pressure of the gas in the vial container 16 (hereinafter referred to as the pressure in the vial) is controlled by changing the pressure of the pressure generator 13 and releasing the pressure in time in the pressure release step S6. It shows how it works.
- step S14 is replaced with step S31.
- Steps other than step S31 are the same as those described in the first embodiment, and a description thereof will be omitted.
- step S13 of FIG. 10 after the injection of the drug solution 16b into the syringe 17 is performed until the specified drug solution amount specified by the prescription from the prescription DB 19, for example, the slide operation of the plunger holding unit 22 is performed.
- the brake unit 24 of the syringe holding unit 23 is forcibly locked and stopped (step S31).
- the flow control valve 11a is “closed” and is in a closed state. Thereby, the excessive injection
- step S11 since the compressed air is fed from the start of pressurization by the pressure generating unit 13 (step S11) until the pressurization is stopped (step S15), the pressure in the vial is maintained on the positive pressure side. Is done. Thereafter, in order to start the pressure release (step S32), the flow control valve 11a is set to an open state in which it is “open” (step S33). At almost the same time, the pressure on the positive pressure side is released to the outside atmosphere by, for example, the pressure release valve 53 provided in the pressure generating unit 13. The state of release of the pressure in the vial at this time can be observed as the gauge pressure of the pressure gauge 25 (step S34), and decreases until the gauge pressure becomes zero as shown in FIG. When the gauge pressure becomes 0, the flow control valve 11a becomes “closed” and is closed (step S35).
- the pressure inside the vial can always be equal to the atmospheric pressure after the injection of the drug solution 16b is completed. Therefore, when the syringe 17 is removed from the compound needle 12, the drug solution 16b inside the vial container 16 and the syringe 17 Further, it is possible to more surely prevent a sudden exposure to the atmosphere. Thereby, a safe chemical solution injection method can be realized.
- the tip 12h of the adjustment needle 12e of the compound needle 12 is always present above the liquid surface 16a of the liquid medicine 16b in the vial container 16 (outside the liquid medicine), the pressure through the adjustment needle 12e when the pressure is released. The backflow of the chemical liquid 16b to the generation unit 13 side does not occur.
- FIG. 13 is a side view which shows schematic structure of the chemical injection device 30 concerning Embodiment 3 of this invention.
- the chemical injection device 30 measures the compound needle 12 for chemical injection, the filling amount and the filling speed of the chemical solution, similarly to the chemical injection device 20 according to the second embodiment.
- the measurement part 14, the pressure generation part 13, and the control part 15 which controls the flow volume control part 11 and the measurement part 14 are provided.
- medical solution injection apparatus 30 has a pressurization function which sends out compressed air, and a decompression function which decompresses the pressure of air to a pressure a little lower than atmospheric pressure.
- the pressure generating unit 13 of the chemical liquid injector 30 includes a positive pressure generating unit 54 and a negative pressure generating unit 55. Further, the pressure generating unit 13 includes a switching valve 56 that selects and connects either the positive pressure generating unit 54 or the negative pressure generating unit 55 to the inside of the vial container 16 via the tube 18.
- the tip 12h of the adjustment needle 12e is disposed above the liquid surface 16a of the vial container 16, and compressed air is introduced into the vial container 16 from the tip 12h of the adjustment needle 12e. Then, the compressed air presses the chemical liquid surface 16a downward, and can inject the chemical liquid 16b into the syringe 17 from the tip 12i of the injection needle 12d in the chemical liquid 16b.
- a pair of pressure sensors 32 is provided between the syringe holding portion 23 and the flange portion 17g of the plunger 17d instead of the pressure gauge 25 arranged in the second embodiment.
- the pressure sensor 32 for example, a capacitance-type pressure sensor, a resistance-type pressure sensor using a pressure-sensitive rubber, a strain gauge, or the like can be used. With this configuration, when the plunger holding portion 22 is locked, it is possible to determine the direction in which the plunger 17d is pulled by detecting signals from the pair of pressure sensors 32, for example, differential signals.
- the differential signal of the pressure sensor 32 is connected to a detection circuit including a differential amplifier 33 for signal processing.
- the detection circuit including the differential amplifier 33 is connected to the control unit 15.
- This configuration makes it possible to determine in real time whether the pressure of the plunger 17d and the chemical solution 16b in the syringe 17 is positive or negative.
- over-injection of the chemical liquid 16b can be prevented, and the syringe 17 can be efficiently filled with an accurate amount of the chemical liquid 16b.
- the pressure of the gas in the vial container 16 can be surely set to a negative pressure before the syringe 17 is removed from the compound needle 12. Thereby, exposure of the chemical solution 16b from the inside of the vial container 16 and the syringe 17 to the atmosphere outside can be reliably prevented, and safe injection of the chemical solution 16b into the syringe 17 can be realized.
- FIG. 14 is a flowchart in which a decompression process flowchart is added to the subsequent process of the flowchart of FIG. 10 described in the second embodiment.
- FIG. 15 shows how the pressure inside the vial container 16 is controlled by changing over time in the process of pressurization and decompression by the pressure generator 13.
- step S15 After the pressurization by the pressure generating unit 13 (positive pressure generating unit 54) is stopped (step S15), the gas in the vial container 16 is sucked through the tube 18 using the pressure reducing function of the pressure generating unit 13. Then, pressure reduction is started (step S41). Specifically, the connection to the inside of the vial container 16 via the tube 18 is switched from the positive pressure generating unit 54 to the negative pressure generating unit 55 by the switching valve 56 of the pressure generating unit 13. Thereafter, the negative pressure generator 55 is operated to start suction.
- the flow rate control valve 11a for controlling the inner diameter of the tube 18 is set to “open” to open (step S42), and the detection signal generated by the pressure sensor 32 and the detection circuit is monitored by the control unit 15 to The pressure is reduced until the pressure becomes equal to the atmospheric pressure or slightly lower than the atmospheric pressure (step S43). Then, when the negative pressure is the same as the atmospheric pressure or a predetermined pressure, the flow control valve 11a is set to “closed”, and the pressure generation unit 13 stops the pressure reduction (step S44).
- the inside of the vial container 16 can be surely brought into a negative pressure state below atmospheric pressure. Therefore, when the syringe 17 is pulled out from the compound needle 12, it is possible to more reliably prevent the chemical solution 16b inside the vial container 16 and the syringe 17 from being exposed to the atmosphere. Thereby, a safe chemical solution injection method can be realized.
- the tip 12h of the adjustment needle 12e of the compound needle 12 is always present above the chemical surface 16a of the chemical solution 16b in the vial container 16 (outside the chemical solution). The backflow of the chemical solution 16b to the pressure generating unit 13 side via the needle 12e is not generated.
- a pressure gauge 25 arranged in the chemical liquid injector 20 according to the second embodiment may be added, and the pressure sensor 25 and the pressure gauge 25 may be used to monitor the pressure. Good. Thereby, the pressure in the vial can be monitored more reliably.
- the case where compressed air is used to press the chemical solution has been described as an example.
- gases than air may be used.
- an inert gas such as nitrogen or argon that does not react with the chemical solution.
- a liquid having a specific gravity lower than that of the chemical liquid may be used, and for example, oil or an oil-based liquid may be used. Since the liquid is incompressible, controllability of the filling amount when filling the chemical liquid is better than when gas is used, and the injection amount can be filled with high accuracy with respect to the final target value.
- the chemical solution in the chemical solution container can be accurately and efficiently injected into the syringe while suppressing the bubbling of the chemical solution.
- a medical worker such as a pharmacist or nurse to inhale the chemical solution into a syringe that is safe to use.
- the work load can be greatly reduced, which is useful.
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Abstract
Description
図1Aおよび図1Bは本発明の実施の形態1にかかる薬液注入装置10の概略構成を示し、図1Aは薬液注入装置10の全体構成を示す側面図、図1Bは流量制御部11の拡大図である。
図8は本発明の実施の形態2にかかる薬液注入装置20の概略構成を示す側面図である。
図13は本発明の実施の形態3にかかる薬液注入装置30の概略構成を示す側面図である。
11 流量制御部
11a 流量制御弁
11b 弁駆動部
12 複合針
12a 受入ポート
12b 保持ポート
12c 針基部
12d 注入用針
12e 調整用針
12f 側面
12g 端部
12h,12i 先端
13 圧力発生部
14 計測部
15 制御部
16 バイアル容器
16a 薬液面
16b 薬液
16c 底部
17 シリンジ
17a ガスケット
17b 先端位置
17c 目盛り
17d プランジャー
17f シリンダー
17g 鍔部
18 チューブ
18a 細菌阻止用フィルタ
19 処方DB
21 シリンダー保持部
22 プランジャー保持部
22a,52a ロッド状部
22b,22c 把持部
23 シリンジ保持部
24 ブレーキ部
25 圧力計
32 圧力センサ
33 差動増幅器
51 ゴム栓
52 ストッパー
52b 突き当て部
52c 支持部
52d 位置決めねじ
53 圧力開放弁
54 陽圧発生部
55 負圧発生部
56 切換弁
Claims (13)
- 薬液容器を受け入れる受入ポートと、シリンジを保持する保持ポートと、針基部を貫通して前記受入ポートと前記保持ポートとを連通する注入用針と、前記針基部の側面から前記受入ポートまで前記針基部を貫通し前記受入ポートにおいて前記注入用針と平行に配置された調整用針と、を有する複合針と、
前記調整用針の前記側面側の端部に接続された供給管を介して前記受入ポートに受け入れられた前記薬液容器内に流体を供給する流体供給部と、
前記保持ポートに保持されたシリンジ内のガスケット位置に基づいて、前記薬液容器から前記注入用針を介して前記シリンジ内に注入された薬液の充填量および充填速度の少なくともいずれか一方を計測する計測部と、
前記計測部での計測結果に基づいて前記流体供給部での流体の供給量を制御する制御部と、を備える、
薬液注入装置。 - 前記制御部は、前記受入ポートに受け入れられた前記薬液容器の薬液面より上部に前記調整用針の先端が配置された状態でのみ、前記流体供給部で流体を供給する制御を行う、
請求項1に記載の薬液注入装置。 - 前記流体供給部は、流体供給管の内径の開放率を制御する流量制御弁を備え、
前記制御部は、所定のデューティ比で前記流量制御弁の前記開放率を制御する、
請求項1または請求項2に記載の薬液注入装置。 - 前記制御部は、前記保持ポートに保持された前記シリンジ内の薬液の充填量が所定の充填量になるまでは前記流量制御弁の前記開放率を常に1とし、前記所定の充填量を超えた後は前記流量制御弁の前記開放率が0になる閉時間と前記開放率が1となる開時間とを周期的に繰り返し、最終の充填量に近づくまで前記閉時間を徐々に長くする制御を行う、
請求項3に記載の薬液注入装置。 - 前記保持ポートに保持された前記シリンジがバレルとガスケットとプランジャーとを備える場合に、前記バレルを保持するバレル保持部と、保持した前記プランジャーと共にスライドしてガスケットの位置を変えるプランジャー保持部と、前記プランジャー保持部がスライドするのをロックするブレーキ部とを備え、
前記制御部は、前記計測部により前記シリンジ内に指定した薬液量が充填されたことを計測した時に、前記ブレーキ部により前記プランジャー保持部をロックする制御を行う、
請求項1から請求項4のいずれか1項に記載の薬液注入装置。 - 前記プランジャー保持部と前記プランジャーの鍔部との間に一対の圧力センサが配置され、
前記制御部は、前記プランジャー保持部がロックされた時に、前記一対の圧力センサからの信号を検出することにより前記プランジャーが引かれている方向を判別し、判別した方向に基づいて前記流体供給部での流体の供給量を制御する、
請求項5に記載の薬液注入装置。 - 前記流体供給部と前記流量制御弁との間に配置された細菌阻止用フィルタをさらに備える、
請求項1から請求項6のいずれか1項に記載の薬液注入装置。 - 前記流体が、気体または前記薬液容器内の薬液よりも低比重の液体である、
請求項1から請求項7のいずれか1項に記載の薬液注入装置。 - 針基部と、前記針基部を貫通して受入ポートと保持ポートとを連通する注入用針と、前記針基部の側面から前記受入ポートまで前記針基部を貫通し前記受入ポートにおいて前記注入用針と平行に配置された調整用針と、を有する複合針を備えた薬液注入装置を設け、
シリンジを前記保持ポートに保持し、
薬液容器を前記受入ポートに受入れ、前記注入用針と前記調整用針とを前記薬液容器に挿入した後に、前記調整用針の先端を前記薬液容器内の薬液の薬液面より上部に配置し、
前記シリンジのガスケットの先端位置を計測し、
前記ガスケットの先端位置に基づいて、前記流体供給部により前記調整用針の前記側面側の端部から前記薬液容器内に流体を供給し、前記注入用針より前記薬液容器内の薬液を前記シリンジに注入する、
薬液注入方法。 - 前記薬液容器内の薬液の前記シリンジへの注入動作は、前記薬液容器内と前記流体供給部とを接続する開放状態と、前記薬液容器内と前記流体供給部とを遮断する閉鎖状態と、を交互に繰返す間欠駆動動作を含み、
前記間欠駆動動作において、前記閉鎖状態の時間を次第に長くする、
請求項9に記載の薬液注入方法。 - 前記薬液注入装置は、前記シリンジのバレルを保持するバレル保持部と、前記シリンジのガスケットの位置を変えるプランジャーを保持し前記プランジャーと共にスライドするプランジャー保持部と、前記プランジャー保持部がスライドするのをロックするブレーキ部とをさらに備え、
前記計測部により前記シリンジ内に指定した薬液量が充填されたことを計測すると、前記ブレーキ部により前記プランジャー保持部をロックする、
請求項9または請求項10に記載の薬液注入方法。 - 前記薬液容器への薬液の注入完了後に、前記薬液容器の中の流体の圧力を前記調整用針および前記供給管および前記流量制御弁を介して、前記流体供給部で減圧して大気圧以下にする圧力開放を行う、
請求項9から請求項11のいずれか1項に記載の薬液注入方法。 - 前記流体が、気体または前記薬液容器内の薬液よりも低比重の液体である、
請求項9から請求項12のいずれか1項に記載の薬液注入方法。
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EP10816902A EP2478888A1 (en) | 2009-09-17 | 2010-09-17 | Medicinal solution injection device and medicinal solution injection method |
CN201080041170.4A CN102497846B (zh) | 2009-09-17 | 2010-09-17 | 药液注入装置及药液注入方法 |
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JP2017515109A (ja) * | 2014-04-02 | 2017-06-08 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツングMerck Patent Gesellschaft mit beschraenkter Haftung | 流体移送デバイスおよび流体を無菌で移送する方法 |
WO2019021985A1 (ja) * | 2017-07-25 | 2019-01-31 | 株式会社ジェイ・エム・エス | 薬液調製装置 |
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JP7254074B2 (ja) | 2017-11-02 | 2023-04-07 | エフ・ホフマン-ラ・ロシュ・アクチェンゲゼルシャフト | 液滴分注デバイスおよびシステム |
JP2021510335A (ja) * | 2018-01-12 | 2021-04-22 | ベクトン・ディキンソン・アンド・カンパニーBecton, Dickinson And Company | 薬剤分注システム |
US11389596B2 (en) | 2018-01-12 | 2022-07-19 | Becton, Dickinson And Company | Smart vial adapter and method |
US11896808B2 (en) | 2018-01-12 | 2024-02-13 | Becton, Dickinson And Company | Smart vial adapter and method |
JPWO2021054142A1 (ja) * | 2019-09-18 | 2021-03-25 | ||
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JP7546694B2 (ja) | 2020-04-29 | 2024-09-06 | ベクトン・ディキンソン・アンド・カンパニー | 空気抜きと検出能力を備えたウェアラブル注入ポンプ用自動充填装置 |
CN112642022A (zh) * | 2020-12-31 | 2021-04-13 | 遵义师范学院 | 一种输液监控系统及监控方法 |
Also Published As
Publication number | Publication date |
---|---|
CN102497846A (zh) | 2012-06-13 |
JP5468082B2 (ja) | 2014-04-09 |
CN102497846B (zh) | 2013-12-18 |
JPWO2011033788A1 (ja) | 2013-02-07 |
US20120197184A1 (en) | 2012-08-02 |
US8926554B2 (en) | 2015-01-06 |
EP2478888A1 (en) | 2012-07-25 |
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