JP2013063105A - Liquid medicine administration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform stable installation on the body surface of a patient while realizing miniaturization.SOLUTION: This liquid medicine administration device 100 includes: a flexible and contractible reservoir 11 capable of storing a liquid medicine; a needle 13 provided insertably into the patient, and injecting the liquid medicine stored in the reservoir 11 into the body of the patient; pumps 25A, 25B supplying the liquid medicine stored in the reservoir 11 to the needle 13; a control part 17 controlling the supply of the liquid medicine by the pumps 25A, 25B; and a case 21 having a sticking part capable of being stuck to the body surface of the patient and bendable plastic regions 5, and storing the reservoir 11, the pumps 25A, 25B and the control part 17. The pumps 25A, 25B and the control part 17 are made of rigid material, and are disposed in regions shifted to the plastic regions 5 of the case 21.

Description

  The present invention relates to a chemical solution administration device.

  DESCRIPTION OF RELATED ART Conventionally, the chemical | medical solution administration apparatus attached to a patient's body surface and administering a chemical | medical solution into a patient's body is known (for example, refer patent document 1). The chemical solution administration device described in Patent Document 1 includes a reservoir that stores a chemical solution, a needle that injects a chemical solution stored in the reservoir into the body of a patient, a pump that supplies the chemical solution from the reservoir to the needle, and each of these members A package made of a rigid material that accommodates and a sealing member that spreads outward over the entire periphery of the package. In the drug solution administration device described in Patent Document 1, a seal member is attached to a patient's body surface with an adhesive and is attached to the patient.

Special table 2009-539444 gazette

  However, when the chemical solution administration device described in Patent Document 1 is attached to the body surface of a portion having a large curvature, such as the arm or stomach of a small woman or child, there is a gap between the package made of rigid material and the body surface. Since a gap is formed, the area of the seal member must be sufficiently larger than the package, and there is a disadvantage that the entire apparatus cannot be reduced in size.

  This invention is made | formed in view of such a situation, Comprising: It aims at providing the chemical | medical solution administration apparatus which can be stably attached to a patient's body surface, aiming at size reduction.

In order to achieve the above object, the present invention provides the following means.
The present invention relates to a reservoir for storing a chemical solution, a needle for injecting the chemical solution stored in the reservoir into the body of a patient, a pump for supplying the chemical solution stored in the reservoir to the needle, and the pump A control unit that controls the supply of the medicinal solution according to the above, a sticking unit that is attached to the body surface of a patient, and a case that accommodates the reservoir, the pump, and the control unit, and includes the reservoir, the pump, and the control unit. Provided is a drug solution administration device in which a portion is made of a rigid material and is arranged in a region shifted from a plastic region of the case.

  According to the present invention, a needle is inserted into a patient, and a case affixing part is affixed to the body surface and attached to the patient. Then, the pump is operated under the control of the control unit, the chemical solution stored in the reservoir is supplied to the needle, and the chemical solution is injected into the patient's body from the needle. Thereby, a chemical | medical solution can be administered in a patient's body, attaching to a patient's body surface.

  Here, when the case is curved along the plastic region, the affixing portion can be affixed to the body surface in a state where the case is bent following the shape of the patient's body surface. In this case, by disposing the pump and the control unit made of a rigid material in a region shifted from the plastic region of the case, the pump and the control unit can be prevented from being hindered when the case is curved. it can.

  Therefore, even on the body surface of a patient with a large curvature, such as the arms and stomach of a small woman or child, the case is bent following the shape, and a gap is formed between the pasting part and the body surface. A pasting part can be pasted without it. Thereby, it can attach stably to a patient's body surface, aiming at size reduction.

  The present invention has a shrinkable double-structure wall body having a storage space for storing a chemical solution, a case having an affixing portion to be attached to a patient's body surface on the outer surface of the wall body, and storage in the storage space A needle for injecting the medicinal solution into the patient's body, a pump accommodated in the case and supplying the medicinal solution stored in the storage space to the needle, accommodated in the case, and A control unit for controlling the supply of the chemical solution, the wall of the case has a bendable plastic region, the pump and the control unit are made of a rigid material, and are shifted with respect to the plastic region of the wall There is provided a drug administration device arranged in a region.

  According to the present invention, the case body itself has a function as a reservoir for storing a chemical solution, so that the number of members accommodated in the case can be reduced and the body surface of the patient can be stably provided while being downsized. Can be attached.

In the said invention, it is good also as having the uneven | corrugated shape which the said wall body protrudes in the clearance gap between the said pump and the said control part.
By comprising in this way, the storage space of a chemical | medical solution can be ensured effectively, without enlarging a case. Therefore, it is possible to increase the capacity of the chemical solution while reducing the size.

  According to the present invention, there is an effect that it can be stably attached to the body surface of a patient while downsizing.

It is a whole lineblock diagram showing the medical fluid administration device concerning a 1st embodiment of the present invention. It is the longitudinal cross-sectional view which cut | disconnected the chemical | medical solution administration apparatus of FIG. 1 in the thickness direction. It is a figure which shows the state which curved the chemical | medical solution administration apparatus of FIG. 2 in the thickness direction along the plastic region. It is the longitudinal cross-sectional view which cut | disconnected the chemical | medical solution administration apparatus which concerns on 2nd Embodiment of this invention in the thickness direction. It is the longitudinal cross-sectional view which cut | disconnected the chemical | medical solution administration apparatus which concerns on the modification of 2nd Embodiment of this invention in the thickness direction. It is a figure which shows an example of the number and position of a plastic region which the case of the chemical | medical solution administration device which concerns on each embodiment of this invention has. It is a figure which shows the other example of the number and position of the plastic region which the case of the chemical | medical solution administration device which concerns on each embodiment of this invention has. It is a figure which shows the other example of the number and position of the plastic region which the case of the chemical | medical solution administration device which concerns on each embodiment of this invention has. It is a figure which shows the other example of the number and position of the plastic region which the case of the chemical | medical solution administration device which concerns on each embodiment of this invention has.

[First Embodiment]
A drug solution administration device according to a first embodiment of the present invention will be described below with reference to the drawings.
The chemical solution administration device 100 according to the present embodiment is attached to the body surface of a patient, and can automatically administer the chemical solution to the patient at a preset dose and time interval.

  As shown in FIGS. 1 and 2, the drug solution administration device 100 includes a retractable reservoir 11 that can store a drug solution, a needle 13 that injects a drug solution stored in the reservoir 11 into a patient's body, and a reservoir 11. A pump unit 15 for supplying a chemical solution to the needle 13, a control unit 17 for controlling the pump unit 15, a battery 19 made of a rigid material for supplying power to the control unit 17, a pump unit 15, the control unit 17 and the battery 19. And a thin flexible substrate 23 having flexibility, and a box-shaped case 21 that accommodates the reservoir 11, the pump unit 15, the control unit 17, the battery 19, and the flexible substrate 23.

  The case 21 is lightweight and has a substantially rectangular parallelepiped shape so as to be easily attached to a patient. At the bottom of the case 21, that is, the outer surface on the side attached to the patient, a flat pasting portion 22 that can be pasted on the patient's body surface is provided. In addition, the case 21 is provided with an input unit (not shown) that allows the user to input a set flow rate and supply time interval of the chemical solution. The set flow rate and supply time interval of the chemical liquid input by the input unit are sent to the control unit 17.

  In addition, on the inner surface of the case 21 facing the bottom and the top, the flexible substrate 23 and the pump unit 15 mounted on the flexible substrate 23, the control unit 17, and the battery 19 are not fixed by screws or bonding. A plurality of fixing portions 21A that can contact and fix them by friction are provided. Even when the wall of the case 21 is curved, the flexible substrate 23, the pump unit 15, the control unit 17, and the battery 19 are fixed by friction. A function is provided that can relieve the slippage that is held by being arbitrarily displaced from the portion 21A. If it is the fixing method by the friction which relieves the snap of the fixing | fixed part 21A when the wall body of case 21 is curved, it will not be limited only to the description content of a present Example.

  The case 21 is made of, for example, a thermoplastic polyester elastomer resin whose resin strength has flexibility near the body temperature, and has a plastic region 5 that can be curved in the thickness direction and maintain its shape. Yes. The plastic region 5 is disposed along the center line L extending in the longitudinal direction at the approximate center in the width direction of the case 21 and has a predetermined width dimension. Therefore, as shown in FIG. 3, the case 21 can maintain its shape while being bent into a substantially arcuate shape along both ends of the width direction along the plastic region 5 in the same direction.

  The reservoir 11 has flexibility and contractility. The reservoir 11 is provided with a septum (chemical solution injection part) 12 made of compressed silicone rubber having high airtightness. The septum 12 is disposed so as to be exposed on the surface of the case 21, and a chemical solution can be injected into the reservoir 11 by inserting a needle or the like into the septum 12.

  The needle 13 (soft cannula) is made of, for example, a flexible material. One end of the needle 13 is disposed inside the case 21, and the other end is disposed so as to protrude outward from the attaching portion 22 of the case 21. By sticking the affixing portion 22 of the case 21 to the patient's body surface, the other end of the needle 13 can be punctured under the patient's skin.

  The pump unit 15 includes two pumps 25A and 25B made of a rigid material having different flow ranges and connected in parallel. Hereinafter, a pump having a large flow rate range is referred to as “large flow pump (H_Pump) 25A”, and a pump having a small flow rate range is referred to as “small flow pump (L_Pump) 25B”.

  The large flow rate pump 25A is capable of delivering a large flow rate of chemical solution in one step as compared with the small flow rate pump 25B. On the other hand, the small flow rate pump 25B is capable of delivering a small flow rate chemical solution in a single step as compared with the large flow rate pump 25A. These large flow rate pump 25 </ b> A and small flow rate pump 25 </ b> B are individually driven by the operation of the control unit 17.

  The large flow pump 25A and the small flow pump 25B are connected to the reservoir 11 by separate tubes 27 and 28, respectively. The large flow pump 25 </ b> A and the small flow pump 25 </ b> B are connected to the needle 13 by a tube 29. The tube 29 includes a main body portion 29A connected to one end of the needle 13, one branch portion 29B divided into two branches from the main body portion 29A and connected to the large flow pump 25A, and the other connected to the small flow pump 25B. And a branch 29C.

  The controller 17 is made of a rigid material. The controller 17 controls the supply of the chemical solution by the large flow pump 25A and the small flow pump 25B based on the set flow rate and supply time interval of the chemical solution input from the user by the input unit. Further, the control unit 17 drives the large flow pump 25 </ b> A to rotate forward so that the chemical solution is sucked from the reservoir 11 through the tube 27 and is sent out to the needle 13 through the tube 29. Further, the control unit 17 can add or reduce the supply amount of the chemical solution supplied to the needle 13 by driving the small flow pump 25B by switching between the normal rotation drive and the reverse rotation drive. It has become.

  Specifically, the control unit 17 drives the small flow pump 25B to rotate forward while stopping the driving of the large flow pump 25A, sucks the chemical solution from the reservoir 11 through the tube 28, and the needle 13 through the tube 29. It is designed to send out chemicals. Thereby, the supply amount of the chemical liquid can be added without hindering the supply of the chemical liquid by the small flow pump 25B by the pressure of the chemical liquid sent out by the large flow pump 25A.

  On the other hand, the control unit 17 drives the small flow pump 25B in the reverse direction while the large flow pump 25A is being driven (that is, the chemical liquid is being supplied to the needle 13 by the large flow pump 25A). A part of the chemical liquid fed from the branch portion 29B of the tube 29 to the main body portion 29A by the large flow pump 25A is made to flow in the direction opposite to the supply direction, that is, toward the branch portion 29C by the small flow pump 25B. It has become. Thereby, the supply amount of the chemical liquid can be reduced by the small flow pump 25B while preventing the chemical liquid from flowing back due to the pressure of the chemical liquid fed to the needle 13 by the large flow pump 25A.

  These large flow pump 25 A, small flow pump 25 B, control unit 17, and battery 19 are arranged in a region shifted from the plastic region 5 of the case 21. For example, as shown in FIG. 1, the large flow pump 25 </ b> A and the control unit 17 are arranged on one side in the width direction of the case 21 across the plastic region 5, and the small flow pump 25 </ b> B and the battery are arranged on the other side in the width direction of the case 21. 19 is arranged. The flexible reservoir 11 is disposed in both the width direction of the case 21 across the plastic region 5 of the case 21, and the needle 13 made of a flexible material is disposed on the plastic region 5 of the case 21. Yes.

The operation of the drug solution administration device 100 according to this embodiment configured as described above will be described below.
In order to administer a drug solution to a patient using the drug solution administration device 100 according to the present embodiment, first, the drug solution administration device 100 in which the drug solution is stored in the reservoir 11 is pressed against the patient's body surface, and the needle is applied to the patient's body surface. The affixing part 22 is affixed while puncturing the other end of 13.

  Here, the case 21 is bent in accordance with the shape of the body surface of the patient by maintaining the shape of the case 21 while being curved in the thickness direction along the plastic region 5 extending in the longitudinal direction at the substantially center in the width direction. The pasting part 22 can be pasted on the body surface. In this case, the pump unit 15, the control unit 17, and the battery 19 made of a rigid material are arranged in a region shifted from the plastic region 5 of the case 21. The case 21 can be curved without being obstructed.

  Therefore, the case 21 is curved according to the shape of the body surface of the patient whose curvature is large, such as a small woman or child's arm or stomach, and there is a gap between the attaching portion 22 and the body surface. The affixing part 22 can be affixed without being formed. Thereby, the chemical | medical solution administration apparatus 100 is stably mounted | worn with a patient.

  When the chemical solution administration device 100 is attached to the patient's body surface, the control unit 17 is operated, and the large flow rate pump 25A and the small flow rate pump 25B of the pump unit 15 are set according to the set flow rate and supply time interval of the chemical solution input by the input unit. Drive. Specifically, the large flow rate of the chemical stored in the reservoir 11 is supplied to the needle 13 by driving the large flow rate pump 25A, and the supply amount is finely adjusted by driving the small flow rate pump 25B. Infused regularly into the body.

  As described above, according to the drug administration device 100 according to the present embodiment, the shape of the body surface of the patient is imitated without being hindered by the pump unit 15, the control unit 17, and the battery 19 accommodated in the case 21. The case 21 can be bent along the plastic region 5 and attached to the body surface. Therefore, it can be stably attached to the patient's body surface while downsizing.

[Second Embodiment]
Next, a drug solution administration device according to a second embodiment of the present invention will be described.
As shown in FIG. 4, the drug solution administration device 200 according to the present embodiment is different from the first embodiment in that the reservoir 11 is not provided and the case 121 has a function as a reservoir for storing the drug solution.
In the following, portions having the same configuration as those of the drug solution administration device 100 according to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The case 121 is formed by a contractible double-structure wall body 131 having a storage space 131A capable of storing a chemical solution. The wall 131 has a frame shape, and the storage space 131 </ b> A is provided in all the regions of the bottom, top, and side of the case 121 and is integrally formed. The case 21 has a pasting portion 22 on the outer surface of the bottom portion of the wall 131, and the septum 12 is disposed on the upper outer surface. The wall body 131 has a plastic region 5 arranged along the center line L.

  According to the drug solution administration device 200 configured as described above, the wall body 131 of the case 21 itself has a function as a reservoir for storing the drug solution, so that there is no need to accommodate the reservoir 11 in the case 21. Therefore, the number of members accommodated in the case 21 can be reduced, and it can be stably attached to the patient's body surface while downsizing.

  In the present embodiment, for example, as shown in FIG. 5, the wall 131 protrudes into the gap between the battery 19, the large flow pump 25 </ b> A, the small flow pump 25, and the control unit 17 in the internal space of the case 21. It is good also as having a shape. Specifically, the inner wall of the wall 131 is formed in a convex shape that protrudes into the gap between the battery 19, the large flow pump 25 </ b> A, the small flow pump 25, and the control unit 17 together with the storage space 131 </ b> A.

  By doing in this way, the storage space 131 </ b> A can be expanded in the internal space as much as the wall 131 protrudes into the internal space of the case 21. Therefore, the chemical solution storage space 131A can be effectively secured without increasing the size of the case 21. Thereby, the residence capacity | capacitance of a chemical | medical solution can be increased, aiming at size reduction.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and includes design changes and the like within a scope that does not depart from the gist of the present invention. . For example, the present invention is not limited to those applied to the above-described embodiments, and may be applied to embodiments obtained by appropriately combining these embodiments, and is not particularly limited. Further, for example, in each of the above-described embodiments, the plastic region 5 provided along the center line L of the case 21 is described as an example of the plastic region. However, the position and number of the plastic regions 5 are limited to this. It is not a thing.

  For example, a plurality of the plastic regions 5 may be arranged in parallel to the direction along the center line L of the case 21 as shown in FIG. 6, or orthogonal to the center line L of the case 21 as shown in FIG. It is good also as arranging two or more parallel to the direction to do. Further, for example, as shown in FIG. 8, a plurality of cases 21 may be arranged in parallel to the direction intersecting the center line L of the case 21, for example, the direction along the diagonal direction. It is good also as arranging two or more in the position where it combined. 6-9, the broken line which shows the plastic region 5 represents only the centerline of each plastic region 5. FIG.

  Further, for example, in each of the above embodiments, the case 21 is made of a thermoplastic polyester elastomer resin. Instead, for example, a thermoplastic resin as shown below is used alone. Alternatively, a plurality of these thermoplastic resins having different chemical structures may be used as a mixture.

  Examples of the thermoplastic resin include saturated polyester resin, acrylic ester resin, methacrylic ester resin, vinyl acetate resin, polyamide resin, epoxy resin (uncured product), hydrocarbon resin, soft vinyl chloride resin, and ethylene-vinyl acid. Examples thereof include copolymer resins, vinyl chloride-vinyl acetate copolymer resins, vinyl chloride-acrylic copolymer resins, styrene resins, and acrylic-styrene copolymer resins.

5 Plastic region 11 Reservoir 13 Needle 17 Control unit 21, 121 Case 22 Pasting unit 25A Large flow pump (pump)
25B Small flow rate pump (pump)
100,200 Chemical solution administration device 131 Wall 131A Storage space

Claims (3)

A reservoir for storing chemicals;
A needle for injecting the medicinal solution stored in the reservoir into the body of a patient;
A pump for supplying the drug solution stored in the reservoir to the needle;
A control unit for controlling the supply of the chemical solution by the pump;
A sticking part to be attached to the patient's body surface and a curved plastic region; and a case for accommodating the reservoir, the pump and the control part,
The liquid medicine administration device, wherein the pump and the control unit are made of a rigid material and are arranged in a region shifted from a plastic region of the case. A case having a shrinkable double-structured wall having a storage space for storing a drug solution, and having an affixing part to be attached to the patient's body surface on the outer surface of the wall;
A needle for injecting the drug solution stored in the storage space into the body of the patient;
A pump that is housed in the case and that supplies the drug solution stored in the storage space to the needle;
A controller that is housed in the case and controls the supply of the chemical solution by the pump;
The wall of the case has a bendable plastic region;
The liquid medicine administration device, wherein the pump and the control unit are made of a rigid material and are arranged in a region shifted from a plastic region of the wall body. The medicinal-solution administration device according to claim 2, wherein the wall body has a concavo-convex shape projecting into a gap between the pump and the control unit.

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