JP6838737B2 - Drip tube holding type drip detector and drip management system - Google Patents

Description

The present invention relates to a detection unit capable of detecting the drip state of an infusion solution, and a drip management system used for confirming the drip state by using the detection unit.

When infusing to a patient, the nurse calculates in advance the number of infusions per minute from the dose and administration time instructed by the doctor, and when adjusting the clamp, infuse while looking at the clock or the like. The work is done to count the number and match it with the calculated number of drops, but this adjustment work is greatly affected by the skill level of the nurse, so it was a burden especially for new nurses.

Utility Model Registration No. 3194008

Therefore, recently, various auxiliary tools have been invented that detect dripping with a sensor attached to a drip tube and notify necessary dripping information.
Among them, Patent Document 1 is a drip counter for drip, which was previously proposed by the applicant and is used by being attached to a drip tube. It is equipped with a detection unit that is attached to the drip tube to detect the drip of the infusion solution, and a display unit that displays the detected drip interval as an analog amount relative to the target drip interval, and displays it as an analog amount. As a feature, the user interface has been devised.

By the way, the drip tube is easily tilted when the patient moves his / her body position or stands up and moves to the toilet, and in that case, the drip trajectory of the infusion solution also deviates from the center of the axis.
Therefore, the detection unit optically detects the dropping of the infusion solution by utilizing the obstruction of the optical path of the detection light by the infusion solution, and the dropping trajectory of the droplet deviates from the optical path of the detection light due to the above-mentioned circumstances. Even if there is an actual drop, it cannot be detected.

If an attempt is made to solve this problem by providing a plurality of light emitting elements and widening the width of the optical path of the detected light, the power consumption will increase accordingly, and it will not be possible to withstand continuous use for a long period of time. On the other hand, easily increasing the battery size goes against the trend of making the detection unit smaller and lighter, and further reducing the number of parts. Furthermore, if a significant load is applied to the drip tube, there is a risk that the drip tube will fall out of the drip bag and impair the stability of the drip, and from the viewpoint of safety, the upper limit of weight reduction should be strictly limited. ing.

The present invention has been made to solve the above problems, and corresponds to an actual detection situation without sacrificing a request for reduction of power consumption, reduction in size and weight, and reduction in the number of parts. An object of the present invention is to provide a novel and useful drip tube holding type drip detection unit capable of significantly increasing the reliability of detection of infusion drip.
Further, the present invention provides a new and useful highly reliable drip management system that can reduce the labor of a nurse in the drip work by using the drip tube holding type drip detection unit as one element. The purpose.

In order to achieve the above object, the invention of claim 1 utilizes an infusion solution of detection light in which a drip tube is inserted between a pair of holder portions and held, and an optical path is provided between the pair of holder portions. A dripping detection unit for detecting the dripping of the infusion solution, which is accommodated and fixed in each of a case consisting of a cover and a cap provided with the pair of holder portions and the peripheral edge of the substrate. The two side parts, the back part, and the upper part are formed in a box shape, and a stepped surface on the inner surface side is provided, and the inner surface side and the outer surface side are substantially similar in shape to be thinned. A pair of reflective trees, a plurality of concave mirrors arranged on a stepped surface on the inner surface side of the reflective tree, and a substrate provided on the cap side, respectively, attached in front of the pair of reflective trees. It is equipped with a point light source and one light receiving element, and on one reflection tree side, it appears that the plurality of concave mirrors are lined up in the vertical direction with the point light source as a common focus as an emission optical system, but when viewed from the horizontal direction. They are arranged in a position that spreads in a fan shape in order from the far side to the near side of the focal distance and does not block each other's optical paths, and the divergent light from the point light source is converted into parallel light by the plurality of concave mirrors. On the other side of the reflection tree, which reflects parallel light, the plurality of concave mirrors appear to be lined up in the vertical direction with the light receiving element as a common focal point, but the focal distance is far when viewed from the lateral direction. They are arranged in a position that spreads in a fan shape in order from one side to the near side and does not block each other's optical paths. The parallel light is converted into convergent light by the plurality of concave mirrors, and the convergent light is reflected to receive the received light. It is a drip tube holding type drip detection unit characterized by converging toward the element.

The invention of claim 2 is characterized in that, in the drip tube holding type drip detection unit according to claim 1 , a plurality of concave mirrors are composed of a mirror surface layer applied to the surface of one resin molded product. It is a drip tube holding type drip detection unit.

The invention of claim 3 is the recess between the battery housed in the case and the power receiving terminal for charging the battery in the drip tube holding type drip detection unit according to claim 1 or 2. It is a drip tube holding type drip detection unit characterized by having it on the bottom surface.

The invention of claim 4 utilizes the result of the drip tube holding type drip detection unit for data acquisition in the drip tube holding type drip detecting unit according to any one of claims 1 to 3. , A drip status monitoring unit that measures the drip interval time and the drip elapsed time and counts the number of drip is provided, and the drip tube holding type drip detection unit and the measured value of the drip interval time are used as the actual drip interval. It consists of a screen control processing unit that creates a screen that displays as an analog amount relative to the target drip interval, and a portable device that has a display unit that displays the screen. In a drip management system that enables the display unit to display an analog amount by providing various data of the drip status monitoring unit by the drip tube holding type drip detection unit in response to a request from the portable device. is there.

By using the drip tube holding type drip detection unit of the present invention, the reliability of drip detection can be improved without sacrificing the demand for reduction of power consumption, miniaturization and weight reduction, and reduction of the number of parts. Can be effectively enhanced.
Further, if the drip management system using the drip tube holding type drip detection unit is used, the labor of the nurse in the drip work can be reduced.

It is explanatory drawing of the use state of the drip management system which concerns on embodiment of this invention. It is an enlarged perspective view of the drip tube holding type drip detection part in FIG. It is a partially exposed perspective view of the drip tube holding type drip detection part of FIG. It is a perspective view of the concave mirror tree of FIG. It is an optical path explanatory view of the detection light of the drip tube holding type drip detection part of FIG. FIG. 5 is an optical path explanatory view of the detection light of the drip tube holding type drip detection unit when FIG. 5 is viewed from another direction. It is explanatory drawing of the screen displayed on the portable device at the time of using the drip management system of FIG.

The drip management system 1 according to the embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a state in which the infusion bag B is hung on a drip stand (not shown). The drip tube holding type drip detection unit 3 is attached to the drip tube S connected to the infusion bag B.
The drip tube holding type drip detection unit 3 is lightweight, and the size of the case 5 forming the outer shape thereof is compact, so that it can be easily attached to the drip tube S and adds a significant weight to the drip tube S. There is nothing.

As shown in detail in FIG. 2, the case 5 is divided into a cover 7 and a cap 21. The cover 7 and the cap 21 are detachably integrated by fitting. Both the cover 7 and the cap 21 are thin and are configured so that the outer shape and the inner shape are substantially similar.

The entire cover 7 is transparent so that light can be transmitted through the cover 7.
The cover 7 has an opening on the side facing the cap 21, and the internal accommodation space is sealed by fitting and integrating with the cap 21.
The cover 7 has a double-headed tubular shape, and the axial base end side, that is, the fitting side with the cap 21 is opened at an end edge perpendicular to the axial direction to form an opening 9 having a circular cross section. .. Flat cylindrical portions 11 are formed in the same diameter along the edge of the opening 9. The top portion 13 of the cylindrical portion 11 is substantially flat and has a plane perpendicular to the axial direction (shown by the alternate long and short dash line). A pair of exposed holes 15 and 15 are provided as one set near the center of the axis of the top portion 13, for a total of two sets.

A pair of holder portions 17 and 17 stand up from the top portion 13. The outer surface side of the holder portion 17 is substantially flush with the cylindrical portion 11 and has a curved surface, while the inner surface side has a flat surface parallel to the axial direction. Further, the holder portion 17 is closed by a virtual spherical surface (shown by a dotted line) centered on one point in the axial direction. The pair of holder portions 17, 17 are arranged so as to face each other with the center of the shaft interposed therebetween.
That is, the outer shape of the pair of holder portions 17 and 17 is formed into a double-headed shape by cutting out a virtual cylindrical body in which the cylindrical portion 11 is coaxially extended and closed in a spherical shape from a rectangular plate material passing through the center of the axis. It has become a rectangle.

A set of holding pieces 19 and 19 project vertically from the inner surface side plane of the holder portion 17. The sandwiching piece 19 has a narrow elongated plate shape, and is arranged so that the long side direction thereof is substantially parallel to the axial direction. The long side edge of the holding piece 19 on one end side in the axial direction is a free end bulging in a curved shape, and the other end side is connected to and integrated with the top portion 13 of the cylindrical portion 11. The pair of holding pieces 19 and 19 are arranged symmetrically so that the distances from the axial direction are equal.
Since the two holder portions 17, 17 are provided, a total of four holding pieces 19, 19, ... Are in a state of protruding inward. In FIG. 1, the drip tube S is inserted between the holder portions 17, 17, and is held in a state of being sandwiched at four places by the sandwiching pieces 19, 19, .... Since the doorway is narrowed by the swollen free end of the holding piece 19, the drip tube S is difficult to fall off.

The cap 21 is colored as a whole for shading, and has a flat bottomed cylindrical shape.

FIG. 3 shows a state in which the cover 7 is removed.
Reference numeral 23 indicates a substrate, which has a substantially disk shape. A pair of reflective trees 25, 25 are attached to the upper surface of the substrate 23, that is, the cover 7 side. The pair of reflective trees 25, 25 are housed and fixed in the holder portions 17, 17 in a one-to-one correspondence. Since the holder portion 17 is transparent and can transmit light, the optical characteristics of the reflection tree 25 are not impaired.

The main body of the reflective tree 25 is an injection-molded product, and the entire surface of the reflective tree 25 is plated with aluminum to form a mirror surface layer.
The reflection tree 25 is composed of two side portions 27 and 29, a back portion 31 and an upper portion 33 in a box shape, and the mirror surface layer on the inner surface side thereof is a concave mirror, which is used as a parabolic mirror in this embodiment. .. The reflection tree 25 is in a raised state near the peripheral edge of the substrate 23, and the inner surface side faces the center of the axis. The pair of reflective trees 25, 25 face each other in the radial direction with the center of the axis interposed therebetween.

As shown in FIG. 4, four parabolic mirrors 35A, 35B, 35C, and 35D are arranged on the stepped surface on the inner surface side of the upper portion 33 and the side portion 27 of one reflection tree 25. Since these parabolic mirrors 35A, 35B, 35C, and 35D are arranged according to their respective focal lengths, they appear to be arranged in the vertical direction from the direction shown in FIG.
However, when viewed from the horizontal direction, they are spread out in a fan shape and are not overlapped even in the direction shown in FIG.
Since these parabolic mirrors 35A to 35D share one focal point and this focal point is on the substrate 23 side, the radius of curvature of the parabolic mirrors 35A to 35D is different due to different focal lengths. ing.

On the other hand, the reflection tree 25 is used as a light emitting optical system 37, and in this light emitting optical system 37, a divergent point light source 39 is used as one focal point. As shown in FIG. 3, the point light source 39 is composed of an infrared LED and is attached in front of the reflection tree 25.
The other reflection tree 25 is used as a light receiving optical system 41, and in this light receiving optical system 41, a light receiving element 43 is located on the substrate 23 side instead of a point light source 39 as one focal point. The light receiving element 43 is composed of an infrared photodiode. In order to increase the sensitivity of the light receiving element 43, it is housed in a rubber light-shielding frame 45. The arrangement relationship between the reflection tree 25 and the light receiving element 43 is the same as that of the light emitting optical system 37.

The parabolic mirrors 35A to 35D of the reflection tree 25 of the light emitting optical system 37 convert the divergent light L2 from the point light source 39 into parallel light L1 and reflect the parallel light L1. On the other hand, the parabolic mirrors 35A to 35D of the reflection tree 25 of the light receiving optical system 41 reflect the parallel light L1 incident from the light emitting optical system 37 and converge it toward the light receiving element 43.
In the light emitting optical system 37, the optical path of the divergent light L2 from the point light source 39 toward one parabolic mirror 35 and the optical path of the parallel light L1 reflected from the light path are blocked by the other three parabolic mirrors 35. The entire parabolic mirror 35 is used for incident and exit.
Further, also in the light receiving optical system 41, the optical path of the parallel light L1 incident on the one parabolic mirror 35 and the optical path of the convergent light L2 reflected from the optical path are one parabolic mirror 35 as in the light emitting optical system 37. The whole of is used for incident and exit.

5 and 6 show the optical path of the parallel light L1 and the optical path of the divergent (= convergent) light L2, and the parallel light L1 is emitted from the light emitting optical system 37 and incident on the light receiving optical system 41. ..
The parallel light L1 is used as the detection light, and as shown in FIG. 5, the vertical width dimensions of the optical path of the parallel light L1 emitted from the parabolic mirrors 35A to 35D of the light emitting optical system 37 are totaled. It is the width dimension of the final detection light, and the detection width is significantly expanded. Further, since a gap is hardly formed between the adjacent parabolic mirrors 35 and 35, the same optical characteristics as when one parabolic mirror is used can be obtained.

The optical path as described above is realized by forming the parabolic mirrors 35A to 35D on the stepped surface on the inner surface side of the upper portion 33 and the side portion 27.
In FIG. 5, the optical paths appear to intersect in the vertical direction on both the divergent light L2 side and the convergent light L2 side, but as shown in FIG. 6, they spread in a fan shape and do not overlap. Although the focused light L2 is shown in FIG. 6, the divergent light L2 is also the same.

By enlarging one parabolic mirror 35, the width dimension of the optical path of the parallel light L1 can be increased, but if it is composed of only one parabolic mirror 35, it becomes larger toward the back side as it approaches the substrate 23. Since it will be retracted, there is a limit to the thin-walled structure, and as a result, the detection unit becomes large.
On the other hand, in the present invention, by using a plurality of parabolic mirrors 35A to 35D in combination and arranging them well, the desired optical characteristics are secured as described above, and the inner surface side and the outer surface side of the reflection tree 25 are arranged. By making the shape similar to that of the above and making it thinner, we have succeeded in reducing the size and weight. Further, since the main body can be integrally molded by injection molding of resin, only one part is required while using a plurality of parabolic mirrors 35A to 35D in combination.

On the cap 21 side, as shown in FIG. 3, a battery case 47 is provided under the substrate 23, and a battery and a substrate (both not shown) are arranged therein. A pair of spacers 48, 48 are provided on the edge side of the battery case 47, and the substrate 23 is placed and fixed on the spacers 48, 48.
A microcomputer including a CPU, a memory, a timer, and the like is mounted on the lower surface side of the substrate 23, and the CPU controls the whole. The battery (power supply) is composed of a lithium-ion battery, and is controlled by the battery to supply power to each part. A pair of power receiving terminals 49, 49 of this battery protrude from the top 13 side. The free end side of the power receiving terminal 49 is folded back, and after protruding from one of a pair of exposed holes 15 and 15, the free end side re-enters and protrudes on the top portion 13 in an inverted U shape. Since the top portion 13 hits the concave bottom portion of the holder portion 17, it does not get in the way when the drip tube S is attached, and since it is between the pair of holder portions 17, 17, it may be caught by surrounding objects. Absent. By using the pair of power receiving terminals 49, 49, the battery can be charged while being housed in the case 5.

Bluetooth (Bluetooth (registered trademark)) is used as a wireless communication function in the CPU, and the communication partner is a dedicated mobile device 51.
The portable device 51 is provided with a CPU, a memory, and the like, and the CPU controls the whole. The CPU has an operation button (operation unit) 53 (dose increment button (△) and decrement button (▽), time increment button (△) and decrement button (▽), which are arranged on the surface. The confirmation button in the center) and the LCD (display) 55 as a display unit are connected, and the input information can be received via the operation of the operation button 53 and can be displayed on the screen by the LCD 55.

Various functional units are realized by executing a dedicated program stored in the memory in each CPU.
On the detection unit 3 side, a "drip status monitoring unit" is realized.
When the detection of the first drip is notified, this "drip status monitoring unit" starts counting the number of drip and starts the addition timer, and the drip elapsed time (in other words, the elapse from the first drip to the present). Start measuring the time. Further, for each infusion count, the infusion interval time (in other words, the time elapsed from the immediately preceding infusion to the immediately following infusion) is measured.
Further, on the mobile device 51 side, a "screen control processing unit" is realized. This "screen control processing unit" creates a screen to be displayed on the LCD 55.

The nurse operates the operation button 53 based on the instruction from the doctor, and for the initial setting, (1) infusion set (0 drops / ml), (2) dose (0 ml), (3). When the administration time (〇h00m) and (4) drop size (standard or large) are input, the screen control processing unit receives the above input data and starts arithmetic processing, and 1) converts the dose into the total number of infusions. 2) Calculate the optimum drip interval.
Based on this result, the screen control processing unit uses the editing tools (design, color, etc.) stored in the memory to sequentially receive data on the drip interval time from the detection unit 3 side, and the moving image for display. Content is created each time and displayed on the LCD 55.
When the nurse moves the roller clamp R attached to the tube T to start the adjustment, the screen control processing unit sequentially receives the data from the detection unit 3 and creates the screen. As shown, the screen on the LCD 55 transitions.
Therefore, the nurse can make the next adjustment with reference to the screen, and it is easy to make an adjustment within an appropriate range.

Although the embodiments of the present invention have been described above, the specific configuration of the present invention is not limited to the above-described embodiments, and even if there are design changes within the scope of the gist of the present invention, the present invention Included in the invention.
For example, the outer shape of the mobile device and the size and design of various images on the display screen may be any as long as they can fulfill the required functions.

1 ‥‥‥ Drip management system 3 ‥‥‥ Drip tube holding type drip detection part 5 ‥‥ Case 7 ‥‥ Cover 9 ‥‥ Opening 11 ‥‥ Cylindrical part 13 ‥‥ Top 15 ‥‥ Exposed hole 17 ‥‥ Holder part 19 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥ ‥ System 39 ‥‥ Point light source 41 ‥‥ Light receiving optical system 43 ‥‥ Light receiving element 45 ‥‥ Shading frame 47 ‥‥ Battery case 49 ‥‥ Power receiving terminal 51 ‥‥ Mobile device 53 ‥‥ Operation button 55 ‥‥ LCD
B ‥‥‥ Infusion bag S ‥‥‥ Drip tube T ‥‥‥ Tube R ‥‥‥ Clemme L1, L2 ‥‥ Optical path

Claims (4)

A drip detection unit that detects the drip of the infusion solution by inserting the drip tube between the pair of holders and holding the drip tube between the pair of holders and using the shielding of the detection light with the light path between the pair of holders by the infusion solution. ,
A case consisting of a cover and a cap having the pair of holders,
The two side portions, the back portion, and the upper portion are housed and fixed in each of the pair of holder portions, and are in a floating state near the peripheral edge of the substrate. The stepped surface on the inner surface side thereof is formed in a box shape. A pair of reflective trees that are provided and whose inner and outer surfaces are substantially similar in shape and thinned,
A plurality of concave mirrors arranged on the stepped surface on the inner surface side of the reflection tree, and
A substrate provided on the cap side is provided with one point light source and one light receiving element attached in front of the pair of reflection trees, respectively.
On one reflection tree side, as a light emitting optical system,
The plurality of concave mirrors appear to be lined up in the vertical direction with the point light source as a common focal point, but when viewed from the side, they spread in a fan shape in order from the far side to the near side of the focal length and do not block each other's light paths. It is arranged at a position, and the divergent light from the point light source is converted into parallel light by the plurality of concave mirrors, and the parallel light is reflected.
On the other reflection tree side, as a light receiving optical system,
The plurality of concave mirrors appear to be lined up in the vertical direction with the light receiving element as a common focal point, but when viewed from the lateral direction, they spread in a fan shape in order from the far side to the near side of the focal length and do not block each other's light paths. Drip tube holding type drip detection , which is arranged at a position and is characterized in that the parallel light is converted into convergent light by the plurality of concave mirrors, and the convergent light is reflected and converged toward the light receiving element. Department. In the drip tube holding type drip detection unit according to claim 1,
A drip tube holding type drip detection unit, wherein the plurality of concave mirrors are composed of a mirror surface layer applied to the surface of one resin molded product. In the drip tube holding type drip detection unit according to claim 1 or 2.
A drip tube holding type drip detection unit characterized by having a battery housed in a case and a power receiving terminal for charging the battery on a concave bottom surface between a pair of holder parts. In order to acquire data from the drip tube holding type drip detection unit according to any one of claims 1 to 3, the results of the drip tube holding type drip detection unit are used to obtain the drip interval time and the drip passage. Equipped with an infusion status monitoring unit that measures the time and counts the number of infusions
The drip tube holding type drip detection unit and
It is equipped with a screen control processing unit that creates a screen that displays the measured value of the drip interval time as the actual drip interval as an analog amount relative to the target drip interval, and a display unit that displays the screen. Consists of portable devices
By using the communication function, the drip tube holding type drip detection unit provides various data of the drip status monitoring unit in response to a request from the portable device, so that the analog amount can be displayed on the display unit. A drip management system that enables it .