JP2017189277A - Flow rate control chip and infusion set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow rate control chip capable of preventing an infusion rate adjustment error due to an artificial operation, and preventing an illegal operation of an infusion set by a third party including a patient.SOLUTION: A flow rate control chip 1 is disposed in the middle of a tube connected to an infusion bottle holding infusion liquid and includes inside a decompressed flow channel 20 for keeping a flow velocity of the infusion liquid that flows in the tube constant. The flow rate control chip 1 also includes inside an infusion liquid reservoir 18 capable of storing the infusion liquid. In the decompressed flow channel 20, the downstream end in an infusion liquid flowing direction is connected to the infusion liquid reservoir 18. The infusion liquid reservoir 18 is divided in a first chamber 25 and a second chamber 26 by a mesh filter 24. The downstream end of the decompressed flow channel 20 is connected to the first chamber 25. An infusion liquid supply path 28 for supplying the infusion liquid passing through the mesh filter 24 to the downstream side in an infusion liquid flowing direction is connected to the second chamber 26.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a flow rate control chip that is used for infusion (infusion) or the like and allows a predetermined amount of fluid such as an infusion solution to flow, and an infusion set including the flow rate control chip.

  Conventionally, infusion (infusion) using an infusion set (infusion set) has been performed for administration of drugs and the like to patients. In the infusion using this infusion set, the dose (infusion rate) of a drug or the like per unit time is determined by a doctor, and the nurse operates the infusion set so that the infusion rate is as determined by the doctor.

  FIG. 6 is a view showing a use state of the conventional infusion set 100. As shown in FIG. 6, an infusion set 100 includes a bottle needle 102 inserted into an infusion bottle 101 suspended from an infusion stand (not shown), a tube 103 with the bottle needle 102 attached to one end, and the tube An indwelling needle 104 attached to the other end of 103 and inserted into the patient's body, an infusion tube 105 disposed between the bottle needle 102 and the indwelling needle 104, and an infusion tube 105 and the indwelling needle 104. The clamp 106 is provided. In the infusion set 100 shown in FIG. 6, the clamp 106 has a function of adjusting the infusion rate. The drip tube 105 is a part for observing the number of drops of infusion solution (drug, nutrient, blood, etc.) used for infusion, and a nurse or the like knows the rate of infusion by observing the number of infusion solutions. Be able to.

  As shown in FIG. 7, the clamp 106 is engaged so that the tube 103 is inserted into the inner space of the clamp body 107 and the rotation shaft 110 of the roller 108 is slidable in the guide groove 112 formed in the inner side wall 111 of the clamp body 107. When the roller 108 is slid along the guide groove 112, the distance between the outer peripheral surface of the roller 108 and the tube support wall 113 of the clamp body 107 changes, and the outer peripheral surface of the roller 108 and the tube support wall 113 are changed. The amount of crushing of the tube 103 located between the two is changed, the amount of squeezing of the infusion solution flowing in the tube 103 is changed, and the infusion rate is adjusted (see Patent Document 1).

JP 2002-336351 A

  However, in the conventional infusion set 100, since the infusion speed is adjusted by manually operating the roller 108 of the clamp 106, mistakes are likely to occur in the adjustment of the infusion speed. Further, in the conventional infusion set 100, the roller 108 of the clamp 106 is easily manipulated by a third party such as a patient (a person other than a medical staff such as a doctor or a nurse), and the infusion speed is shifted from an appropriate speed. This makes it easier for medical accidents to occur.

  Therefore, the present invention provides a flow rate control chip that can prevent an adjustment error of the infusion speed due to an artificial operation, and that can prevent an unauthorized operation of the infusion set by a third party such as a patient, and an infusion set including the same.

  The flow rate control chips 1 and 31 according to the present invention are arranged in the middle of the tube 5 connected to the infusion bottle 3 in which the infusion solution is accommodated, and keep the flow rate of the infusion solution flowing through the tube 5 constant. The decompression flow paths 20 and 44 are provided inside.

  The infusion sets 2 and 32 according to the present invention are disposed in the flow rate control chips 1 and 31 and the tube 5 on the downstream side of the flow rate control chips 1 and 31 in the flow direction of the infusion solution. And an on-off valve 7 for opening and closing the valve.

  According to the present invention, since a predetermined infusion speed is maintained by the decompression flow path, infusion speed adjustment by an artificial operation becomes unnecessary, an adjustment error of the infusion speed due to an artificial operation can be prevented, and a patient or the like can be prevented. Unauthorized operation of the infusion set by a third party can be prevented.

It is a figure which shows the use condition of the infusion set provided with the flow control chip concerning this 1st Example of this invention, and this flow control chip. It is a figure which shows the detail of a flow control chip | tip, FIG. 2 (a) is a front view of a flow control chip, FIG.2 (b) is a flow control chip shown by cut | disconnecting along the A1-A1 line of Fig.2 (a). 2C is a rear view of the flow rate control chip, and FIG. 2D is a plan view of the flow rate control chip viewed from the direction of arrow B1 in FIG. It is a figure which shows the detail of a flow control chip | tip, FIG. 3 (a) is a front view (figure corresponding to FIG. 2 (a)) of the flow control chip | tip which shows the flow state of infusion solution, FIG.3 (b) is infusion solution. FIG. 3C is a rear view of the flow rate control chip showing the flow state of the infusion solution. FIG. 3C is a cross-sectional view of the flow rate control chip showing the flow state of FIG. It is a figure which shows the use condition of the infusion set provided with the flow control chip concerning this 2nd Example of this invention, and this flow control chip. It is a figure which shows the detail of a flow control chip | tip, FIG. 5 (a) is a front view of a flow control chip, FIG.5 (b) is a flow control chip shown by cut | disconnecting along the A2-A2 line of Fig.5 (a). FIG. 5C is a plan view of the flow rate control chip viewed from the direction of the arrow B2 in FIG. It is a figure which shows the use condition of the conventional infusion set. It is sectional drawing of the clamp which comprises the conventional infusion set.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
FIG. 1 is a diagram showing a usage state of a flow rate control chip 1 and an infusion set 2 including the flow rate control chip 1 according to the first embodiment of the present invention. As shown in FIG. 1, an infusion set 2 includes a bottle needle 4 inserted into an infusion bottle 3 suspended from an infusion stand (not shown), a tube 5 having the bottle needle 4 attached to one end thereof, and a tube 5 An indwelling needle 6 that is attached to the other end of the patient and inserted into the patient's body, a flow control chip 1 that is disposed in the middle of the tube 5 that connects the bottle needle 4 and the indwelling needle 6, the flow control chip 1 and the indwelling needle. And an on-off valve 7 disposed in the tube 5 between the two. The infusion set 2 shown in FIG. 1 has a configuration in which the drip tube 105 and the clamp 106 of the conventional infusion set 100 are replaced with the flow rate control chip 1 and the on-off valve 7 as compared with the conventional infusion set 100 shown in FIG. It has become.

  2 to 3 are diagrams showing details of the flow rate control chip 1. 2A is a front view of the flow rate control chip 1, FIG. 2B is a cross-sectional view of the flow rate control chip 1 cut along the line A1-A1 of FIG. 2A, and FIG. FIG. 2C is a rear view of the flow rate control chip 1, and FIG. 2D is a plan view of the flow rate control chip 1 viewed from the direction of arrow B1 in FIG. 3A is a front view of the flow control chip 1 showing the flow state of the infusion solution (a diagram corresponding to FIG. 2A), and FIG. 3B is a flow control chip showing the flow state of the infusion solution. 1 is a sectional view (corresponding to FIG. 2B), and FIG. 3C is a rear view of the flow rate control chip 1 showing a flow state of the infusion solution.

  The flow control chip 1 shown in these drawings covers a chip body 8 formed of a synthetic resin material (for example, polyethylene (PE), polypropylene (PP), polyamide (PA)) and the front side of the chip body 8. The first film 10 made of an elastically deformable and transparent synthetic resin material (for example, polyethylene (PE), polypropylene (PP), polyamide (PA)) fixed to the substrate and the back side of the chip body 8 is covered. And a second film 11 made of a synthetic resin material (for example, polyethylene (PE), polypropylene (PP), polyamide (PA)) that is fixed and elastically deformable and transparent.

  The chip body 8 includes an infusion solution flow path forming portion 12 which is a plate having a substantially rectangular front shape, and a pipe integrally formed on one end side in the longitudinal direction (Y-axis direction) of the infusion solution flow passage forming portion 12. And a pipe-like infusion solution supply passage forming portion 14 integrally formed on the other end side in the longitudinal direction (Y-axis direction) of the infusion solution passage forming portion 12. ing.

  The infusion solution introduction path forming unit 13 is fitted with an end of a tube 5 extending from the bottle needle 4, and the infusion solution in the infusion bottle 3 is passed through the tube 5 to the internal space (first space) of the infusion solution channel forming unit 12. An infusion solution introduction path 16 for introduction into the infusion solution reservoir 15) is formed. The infusion solution introduction path forming portion 13 is formed with a ring-shaped first retaining protrusion 17 on the outer peripheral surface for preventing the fitted tube 5 from coming off. The first retaining protrusion 17 has an arcuate outer surface and can be smoothly fitted in a state where the tube 5 is elastically deformed.

  In the infusion solution flow path forming part 12, a first infusion solution reservoir 15 communicating with the infusion solution introduction path 16 is formed on one end side. The first infusion solution reservoir 15 is a rectangular hole that opens on the front and back of the infusion solution flow path forming portion 12, and the opening portions on the front and back of the infusion solution flow passage forming portion 12 are the first film 10 and the second film 11. It is blocked by. In addition, the infusion solution flow path forming unit 12 is formed with a labyrinth-like decompression flow channel 20 that connects the first infusion solution reservoir 15 and the second infusion solution reservoir 18. The decompression channel 20 has a two-layer structure on the front side and the back side, and the infusion solution that has flowed from the first infusion solution reservoir 15 into the first decompression channel unit 20a on the front side passes through the first connection channel 20b. The infusion solution that has been guided to the second reduced pressure channel portion 20c on the back surface side and has flowed through the second reduced pressure channel portion 20c is guided to the third reduced pressure channel portion 20e on the back surface side through the second connection channel 20d, and The infusion solution that has flowed through the third decompression channel portion 20e is guided to the fourth decompression channel portion 20g on the surface side via the third connection channel 20f, and the infusion solution that has flowed through the fourth decompression channel portion 20g is the fourth connection. The infusion solution that is guided to the surface side fifth decompression channel portion 20i through the path 20h and flows through the fifth decompression channel portion 20i is dripped into the second infusion solution reservoir 18 through the fifth connection channel 20j. It has become. The decompression flow path 20 is a narrow flow path in which the first to fifth decompression flow path portions 20a, 20c, 20e, 20g, and 20i are extended while being regularly bent. The decompression flow path 20 allows the infusion solution in the first infusion solution reservoir 15 to drop into the second infusion solution reservoir 18 by a predetermined number (predetermined amount) within a predetermined time (at a predetermined infusion rate). The flow path width, the flow path depth, and the flow path length are set. In FIG. 3, the flow direction of the infusion solution is indicated by a thick line arrow.

  Further, the infusion solution flow path forming unit 12 connects the second infusion solution reservoir 18 and the third infusion solution reservoir 21 via the sixth connection path 22. The second infusion solution reservoir 18 is a rectangular hole that opens on the front and back of the infusion solution flow path forming unit 12, and the opening portions on the front and back of the infusion solution flow channel forming unit 12 are formed by the first film 10 and the second film 11. It is blocked. The second infusion solution reservoir 18 can observe the instillation state of the infusion solution 23 from the outside, and a nurse or the like can visually confirm the instillation state of the infusion solution 23 (FIG. 3). reference). The third infusion solution reservoir 21 is a round hole that opens on the front and back of the infusion solution flow path forming unit 12, is formed on the other end side of the infusion solution flow channel forming unit 12, The opening is closed by the first film 10 and the second film 11. The third infusion solution reservoir 21 is divided into two chambers by a mesh filter 24 inside. In the first chamber 25 of the third infusion solution reservoir 21 divided by the mesh filter 24, the sixth connection path 22 is opened. The second chamber 26 of the third infusion solution reservoir 21 separated by the mesh filter 24 flows so that the infusion solution that has flowed into the first chamber 25 via the sixth connection path 22 flows after passing through the mesh filter 24. It has become.

  The mesh filter 24 is fitted and fixed to the filter installation step portion 27 formed in the third infusion solution reservoir 21 to remove bubbles and foreign matters in the infusion solution flowing into the first chamber 25, and the bubbles and foreign matters are removed. The infusion solution thus prepared is allowed to flow into the second chamber 26. In the mesh filter 24, a filter portion 24b is formed inside a cylindrical outer tube 24a, and a large number of rectangular openings are formed in the filter portion 24b. The mesh filter 24 having such a shape and function is formed of a synthetic resin material (for example, polyethylene (PE), polypropylene (PP), polyamide (PA)), and is formed with high accuracy by injection molding. Yes. Note that the mesh filter 24 is formed such that the length of one side of the opening is 0.1 to 1.0 mm, for example.

  The infusion solution supply path forming section 14 is fitted with the end of the tube 5 extending from the on-off valve 7 to form an infusion solution supply path 28 that connects the second chamber 26 of the third infusion solution reservoir 21 and the tube 5. ing. Further, the infusion solution supply path forming portion 14 is formed with a ring-shaped second retaining protrusion 30 on the outer peripheral surface for preventing the fitted tube 5 from coming off. The second retaining protrusion 30 of the infusion solution supply path forming part 14 has an arc surface on the outer surface, like the first retaining protrusion 17 of the infusion liquid introduction path forming part 13, and elastically deforms the tube 5. It can be smoothly fitted in the state.

  The first film 10 and the second film 11 have the same shape (substantially rectangular shape) as the front shape of the infusion solution flow path forming portion 12, and are formed of the same synthetic resin material and the same thickness. Therefore, the flow rate control chip 1 of the present embodiment fixes the first film 10 to the front side of the infusion solution flow path forming unit 12 and fixes the second film 11 to the back side of the infusion solution flow channel forming unit 12. However, the second film 11 may be fixed to the front side of the infusion solution flow path forming unit 12 and the first film 10 may be fixed to the back side of the infusion solution flow channel forming unit 12.

  In the infusion set 2 including the flow control chip 1 having such a configuration, the bottle needle 4 is inserted into the infusion bottle 3 with the open / close valve 7 closing the flow path of the tube 5, and the first film 10 of the flow control chip 1 is inserted. Further, the second film 11 is squeezed a plurality of times so as to be pushed inward of the second infusion solution reservoir 18, whereby the infusion solution is dripped and accumulated in the second infusion solution reservoir 18 from the fifth connection path 20 j. Then, the infusion set 2 provided with the flow rate control chip 1 opens the flow path of the tube 5 with the on-off valve 7 when the infusion solution is accumulated in the space of the second infusion solution reservoir 18 by about 1/3 to 1/2. After the infusion solution is filled up to the tip of the indwelling needle 6, the indwelling needle 6 is inserted into the patient's body (arm, etc.), and the infusion is started.

  Such a flow rate control chip 1 according to the present embodiment makes it possible to depressurize the infusion solution through the decompression channel 20 and drop it into the second infusion solution reservoir 18 at a predetermined rate, and to maintain the infusion rate at a constant rate. Since it can hold | maintain, the infusion speed adjustment by human operation becomes unnecessary, the adjustment mistake of the infusion speed resulting from human operation can be prevented, and the unauthorized operation of the infusion set 2 by third parties, such as a patient, can be prevented. Note that the flow rate control chip 1 is prepared for each infusion rate, and the infusion rate according to the doctor's instructions is selected and used.

  Moreover, since the flow rate control chip 1 according to the present embodiment has the mesh filter 24 installed in the third infusion solution reservoir 21, the mesh filter 24 removes bubbles and foreign matters in the infusion solution supplied to the patient. Is possible.

[Second Embodiment]
FIG. 4 is a diagram illustrating a usage state of the flow rate control chip 31 and the infusion set 32 including the flow rate control chip 31 according to the second embodiment of the present invention. As shown in FIG. 4, an infusion set 32 includes a bottle needle 4 inserted into an infusion bottle 3 suspended from an infusion stand (not shown), a tube 5 with the bottle needle 4 attached to one end, and a tube 5 An indwelling needle 6 that is attached to the other end of the tube and inserted into the patient's body, a drip tube 33 disposed in the middle of the tube 5 that connects the bottle needle 4 and the indwelling needle 6, and the drip tube 33 via the tube 5 And the on-off valve 7 disposed in the tube 5 between the flow control chip 31 and the indwelling needle 6. The infusion set 32 shown in FIG. 4 has a configuration in which the clamp 106 of the conventional infusion set 100 is replaced with the flow control chip 31 and the on-off valve 7 as compared with the conventional infusion set 100 shown in FIG. .

  FIG. 5 is a diagram showing details of the flow rate control chip 31. 5A is a front view of the flow control chip 31, FIG. 5B is a cross-sectional view of the flow control chip 31 cut along the line A2-A2 of FIG. 5A, and FIG. c) is a plan view of the flow rate control chip 31 as seen from the direction of arrow B2 in FIG.

  A flow control chip 31 shown in FIG. 5 covers a chip body 34 formed of a synthetic resin material (for example, polyethylene (PE), polypropylene (PP), polyamide (PA)) and the front side of the chip body 34. And a fixed elastically deformable and transparent synthetic resin material (for example, polyethylene (PE), polypropylene (PP), polyamide (PA)) film 35.

  The chip body 34 is a pipe integrally formed on one end side in the longitudinal direction (Y-axis direction) of the infusion liquid flow path forming part 36 and a transfusion liquid flow path forming part 36 that is a plate-like body having a substantially rectangular front shape. And a pipe-like infusion solution supply passage formation portion 38 integrally formed on the other end side in the longitudinal direction (Y-axis direction) of the infusion solution passage formation portion 36. ing.

  The infusion solution introduction path forming unit 37 is fitted with an end of a tube 5 extending from the bottle needle 4, and the infusion solution in the infusion bottle 3 is passed through the tube 5 to the internal space (first space) of the infusion solution channel forming unit 36. An infusion solution introduction path 41 for introduction into the infusion solution reservoir 40) is formed. Further, the infusion solution introduction path forming portion 37 has a ring-shaped first retaining protrusion 42 formed on the outer peripheral surface for preventing the fitted tube 5 from coming off. The outer surface of the first retaining protrusion 42 has an arc shape and can be smoothly fitted in a state where the tube 5 is elastically deformed.

  In the infusion liquid channel forming portion 36, a first infusion liquid reservoir 40 communicating with the infusion liquid introduction path 41 is formed on one end side in the longitudinal direction (Y-axis direction). The first infusion solution reservoir 40 is a bottomed rectangular hole that opens to the surface side of the infusion solution channel forming portion 36, and the opening portion on the surface side of the infusion solution channel forming portion 36 is closed by the film 35. It is peeling off. The infusion liquid channel forming part 36 is formed with a labyrinth-like decompression channel 44 that connects the first infusion solution reservoir 40 and the second infusion solution reservoir 43. This decompression channel 44 is formed only on the surface side, and the infusion solution that has flowed from the first infusion solution reservoir 40 into the first decompression channel unit 44a enters the second decompression channel unit 44c via the first connection channel 44b. The infusion liquid that has been guided and flows through the second decompression flow path section 44c is guided to the third decompression flow path section 44e via the second connection path 44d, and the infusion liquid that has flowed through the third decompression flow path section 44e is the third. The liquid is dropped into the second infusion solution reservoir 43 through the connection path 44f. The decompression flow path 44 is a narrow flow path in which the first to third decompression flow path portions 44a, 44c, and 44e are extended while being regularly bent. The decompression flow path 44 allows the infusion solution in the first infusion solution reservoir 40 to drop into the second infusion solution reservoir 43 by a predetermined number (predetermined amount) within a predetermined time (at a predetermined infusion rate). The flow path width, the flow path depth, and the flow path length are set.

  Further, the second infusion solution reservoir 43 of the infusion solution flow path forming part 36 is a bottomed round hole opened on the surface side of the infusion solution flow path forming part 36, and the longitudinal direction of the infusion solution flow path forming part 36 ( The opening part on the surface side of the infusion solution flow path forming part 36 is closed by the film 35. The second infusion solution reservoir 43 is divided into two chambers by a mesh filter 45 inside. In the first chamber 46 of the second infusion solution reservoir 43 divided by the mesh filter 45, the third connection path 44f is opened. The second chamber 47 of the second infusion solution reservoir 43 separated by the mesh filter 45 flows so that the infusion solution that has flowed into the first chamber 46 via the third connection path 44f flows after passing through the mesh filter 45. It has become.

  The mesh filter 45 is fitted and fixed to the filter installation step portion 48 formed in the second infusion solution reservoir 43 to remove bubbles and foreign matters in the infusion solution flowing into the first chamber 46, and the bubbles and foreign matters are removed. The infusion solution thus prepared is allowed to flow into the second chamber 47. In the mesh filter 45, a filter portion 45b is formed inside a cylindrical outer tube 45a, and a large number of rectangular openings are formed in the filter portion 45b. The mesh filter 45 having such a shape and function is formed of a synthetic resin material (for example, polyethylene (PE), polypropylene (PP), polyamide (PA)), and is formed with high accuracy by injection molding. Yes. The mesh filter 45 is formed such that the length of one side of the opening is, for example, 0.1 to 1.0 mm.

  The end of the tube 5 extending from the on-off valve 7 is fitted to the infusion solution supply path forming unit 38, and an infusion solution supply path 50 that connects the second chamber 47 of the second infusion solution reservoir 43 and the tube 5 is formed. ing. Further, the infusion solution supply path forming portion 38 is formed with a ring-shaped second retaining protrusion 51 on the outer peripheral surface for preventing the fitted tube 5 from coming off. The second retaining protrusion 51 of the infusion solution supply path forming portion 38 has an arc surface on the outer surface, like the first retaining protrusion 42 of the infusion solution introduction path forming portion 37, and the tube 5 is elastically deformed. It can be smoothly fitted in the state.

  The infusion set 32 having the flow rate control chip 31 having such a configuration is obtained by inserting the bottle needle 4 into the infusion bottle 3 with the opening / closing valve 7 closing the flow path of the tube 5 and pinching the drip tube 33 a plurality of times. The infusion solution drops and accumulates in the drip tube 33. The infusion set 32 provided with the flow rate control chip 31 opens the flow path of the tube 5 with the on-off valve 7 when the infusion solution is accumulated in the space of the drip tube 33 by about 1/3 to 1/2. After filling the tip of the indwelling needle 6 through the flow rate control chip 31, the infusion is started by inserting the indwelling needle 6 into the body (arm, etc.) of the patient. The infusion speed is controlled at a constant speed by the flow rate control chip 31, but a nurse or the like can visually confirm the infusion speed by observing the infusion speed of the infusion liquid to the infusion tube 33.

  Such a flow rate control chip 31 according to the present embodiment makes it possible to depressurize the infusion solution through the decompression channel 44 and drop it into the second infusion solution reservoir 43 at a predetermined rate, and to maintain the infusion rate at a constant rate. Therefore, it is not necessary to adjust the infusion speed by an artificial operation, and it is possible to prevent an adjustment error of the infusion speed due to an artificial operation, and to prevent an unauthorized operation of the infusion set 32 by a third party such as a patient. it can. The flow rate control chip 31 is prepared for each infusion rate, and the infusion rate according to the doctor's instruction is selected and used.

  Further, since the flow rate control chip 31 according to the present embodiment has the mesh filter 45 installed in the second infusion solution reservoir 43, the mesh filter 45 removes bubbles and foreign matters in the infusion solution supplied to the patient. Is possible.

  The flow rate control chips 1 and 31 according to the present invention are not limited to the above-described embodiments in which the infusion target is a human, but can be similarly applied to the case where the infusion target is an animal. Moreover, the flow control chips 1 and 31 according to the present invention can also be applied when supplying fertilizer, water and the like to plants.

  Moreover, it is preferable that the flow rate control chips 1 and 31 according to the present invention change the color for each infusion rate and add a number for coloring and / or for each infusion rate so that they can be appropriately selected for each infusion rate.

  1, 31 ... Flow control chip, 2, 32 ... Infusion set, 3 ... Infusion bottle, 5 ... Tube, 7 ... Open / close valve, 20, 44 ... Pressure reducing channel

Claims (4)

Placed in the middle of the tube connected to the infusion bottle containing the infusion solution,
A decompression flow path is provided inside to maintain a constant flow rate of the infusion solution flowing through the tube.
A flow control chip characterized by that. An infusion solution reservoir that can store the infusion solution is provided inside,
The decompression flow path is connected to the infusion solution reservoir at a downstream end along the flow direction of the infusion solution,
The infusion solution reservoir is divided into a first chamber and a second chamber by a mesh filter,
The first chamber is connected to the downstream end of the decompression flow path,
The second chamber is connected to an infusion solution supply path for supplying the infusion solution that has passed through the mesh filter to the downstream side in the flow direction of the infusion solution.
The flow control chip according to claim 1. An infusion solution reservoir for infusion rate monitoring is provided between the decompression channel and the infusion solution reservoir,
The infusion solution reservoir for monitoring the infusion rate is configured to be able to store an infusion solution dripping from the decompression channel, and to observe the infusion solution dripping from the decompression channel so as to be visible from the outside. The infusion solution on the side of the infusion bottle can be introduced by having a window, the observation window is closed with an elastically deformable and transparent film made of a synthetic resin material, and the film is operated a plurality of times so that the film is held. You can do it,
The flow control chip according to claim 1 or 2, wherein The flow rate control chip according to any one of claims 1 to 3,
An on-off valve that is disposed in the tube on the downstream side in the flow direction of the infusion solution from the flow rate control chip, and opens and closes the flow path of the tube;
An infusion set characterized by comprising:

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