JPH10244001A - Medicinal liquid infusion implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an infusion implement which can infuse medicinal liquid by a desired quantity into a body at various different points while preventing tubes from entangling. SOLUTION: A support 2 having opened opposite ends is covered with a balloon 1 made of elastic materials, substantially in its entirety. The support 2 has an inner cavity 21 and a duct wall formed therein in with communication holes 22 through which the inner cavity 21 is communicated with the outside, and is also formed at its opposite ends with outlet passages 23, 24 through which the inner cavity 21 is communicated with the outside. The support 2 is connected at the opposite ends with a first flow control part 41 and a second flow control part 42, the first flow control part 41 being connected with a flow control pipe 412 upstream of which a medicinal liquid passage 411 is provided, being connected with a medicinal liquid injecting part 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drug solution injection device capable of continuously injecting a predetermined amount of a drug solution into a blood vessel, epidural, subcutaneous, or bladder for a long period of time.

[0002]

2. Description of the Related Art Conventionally, as a means for injecting a small amount of a drug solution such as an antibiotic, an anticancer drug, or an anesthetic into a blood vessel, epidural, or the like, a balloon made of an elastic material is filled with the drug solution and the contraction force of the balloon is reduced. 2. Description of the Related Art A drug solution injecting device that continuously injects a drug solution into a blood vessel or the like for a relatively long time using the same has been used. This is a chemical injection device using a balloon having a multilayer structure in which a hollow inner surface of a natural rubber tubular body is covered with a silicone resin.
Comprising a balloon, a liquid injector, and a liquid outlet,
The flow rate is controlled by flow rate control means interposed in the chemical solution passage on the chemical solution outflow side. In use, an injection needle or a catheter is connected to the drug solution injection device, and the drug solution is injected into the human body. And, for example,
When an anticancer drug is administered using this drug solution injection device, a method of injecting a drug solution only into the cancer cell portion is employed in order to avoid adverse effects or side effects on normal cells as much as possible.

[0003]

However, the cancer cells are not always present at only one place, but may be metastasized to a plurality of places. In this method, an anticancer drug cannot be injected into each of a plurality of scattered cancer cell portions. Therefore, a method of connecting a plurality of branched tubes or a three-way cock to inject an anticancer agent into each of a plurality of scattered cancer cell parts can be considered, but in this method, the branched tubes are connected to each other. The problem of entanglement had arisen. The present invention is intended to solve the above problems, without tangling the tubes,
It is an object of the present invention to provide a drug solution injector capable of injecting a desired flow rate of a drug solution into different parts of a human body.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies in order to solve the drawbacks of such a conventional liquid injector, and as a result, provided outflow passages at both ends of a support supporting the balloon. It has been found that the above problems can be solved by connecting a flow control unit having a flow control pipe to the outflow passage of the present invention, and arrived at the present invention. That is, the present invention is a drug solution injection device that can store a drug solution in a balloon made of an elastic material, and can continuously inject the drug solution into a human body over a long period of time by using the contraction force of the balloon. A support having a hole formed in the tube wall for communicating the lumen with the outside, and an outflow passage communicating the lumen with the outside formed at both ends; and A balloon tightly fixed to the outer periphery of both ends of the support, a stopcock interposed in the chemical passage communicating with the outflow passage to open and close the chemical passage, and a flow control tube for controlling the flow of the chemical arranged in the chemical passage And a tube connection portion to which a tube can be connected,
First and second flow control units connected to both end openings of the support, and a chemical injection unit provided in a chemical passage upstream of a flow control pipe of the first flow control unit, It is a drug solution injection device comprising:

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an embodiment of the drug solution injection device of the present invention, FIG. 2 is a cross-sectional view of the drug solution injection device shown in FIG. 1, and FIG. .

FIG. 1 and FIG. 2 are drawings of a drug solution injection device showing an example of the present invention, in which a balloon 1 made of an elastic material is covered almost all over a support 2 having both ends opened. The support 2 has a lumen 21 and a tube wall, and a communication hole 22 for communicating the lumen 21 with the outside is formed in the tube wall, and the lumen 21 and the outside are formed at both ends. Outflow passages 23 and 24 communicating with each other are formed. A first flow control unit 41 and a second flow control unit 42 are respectively connected to both ends of the support 2. Is the chemical injection part 3
Is provided.

The support 2 is usually formed in a cylindrical shape.
A lumen 21 is formed along the longitudinal direction. The lumen 21 communicates with a first flow control unit 41 and a second flow control unit 42 through outflow passages 23 and 24, respectively. Have been. At least one communication hole 22 is formed in the tube wall of the support 2 so that the lumen 21 and the inside of the balloon 1 can communicate with each other. After flowing into the lumen 21 through 23, it further flows into the balloon 1 through the communication hole 22 to inflate the balloon 1. Here, the communication hole 22
It is preferable that a plurality of the balloons 1 are evenly arranged so that the entire balloon 1 is evenly inflated. Further, it is preferable that the lumen 21 be formed small in consideration of the remaining amount of the drug solution after injecting the drug solution into the human body. For example, the lumen 21 may be formed to have the same size as the outflow passage 23. Examples of the material of the support 2 employed here include polycarbonate, polypropylene, and polyethylene.

The balloon 1 is tightly fixed by fixing rings 51 and 52 on the outer periphery of both ends of the support 2.
The balloon 1 has a tube shape (not shown) having an inner diameter enough to be in close contact with the outer wall of the support 2 in a contracted state in which the liquid medicine is not injected, and expands when the liquid medicine is injected. In addition, as a material of the balloon 1, a rubber-like elastic material such as a synthetic rubber or a natural rubber can be used.

The first flow control unit 41 includes a chemical passage 411 communicating with the outflow passage 23 of the support 2 and a chemical passage 411.
Flow control pipe 4 arranged in the inside to control the chemical solution at a predetermined flow rate
12 and a stopcock 413 interposed in the chemical solution passage 411, preferably upstream of the flow control pipe 412, for switching the chemical solution passage 411 between an open state and a closed state.
And a tube connecting portion 414 to which the tube 61 shown in FIG. 3 can be connected by means such as screwing. The second flow control unit 42 has the same configuration as the first flow control unit 41, and has a chemical passage 421 communicating with the outflow passage 24 of the support 2, and a predetermined flow rate of the chemical arranged in the chemical passage 421. And a stopcock 423 that is preferably interposed in the chemical solution passage 421 upstream of the flow control tube 422 and that can switch between the open state and the closed state of the chemical solution passage 421, and FIG. Tube 6 shown
Tube connecting portion 42 which can connect 2 by screwing or the like.
And 4. Here, the flow control pipe 412,
As the 422, a stainless steel or synthetic resin hollow tube having an inner diameter smaller than the inner diameter of the chemical liquid passages 411 and 421 (preferably about 1/5 to 1/500) is preferably adopted. The flow rate controlled by the flow rate control pipe 412 and the flow rate controlled by the flow rate control pipe 422 may be the same flow rate or different flow rates depending on the use form of the drug solution injector. The flow control pipe 412 of the first flow control unit 41 in the present embodiment is interposed at the inner end of the chemical liquid passage 411 downstream of the stopcock 413 for easy manufacturing, but is limited to this arrangement. Not something. this is,
The same can be said for the second flow control unit 42.

The chemical liquid injection section 3 includes an injection port 31 through which a chemical liquid can be injected with a syringe or the like, and a check valve 32 which permits the passage of the chemical liquid from the injection port 31 to the chemical liquid passage 411 but does not permit the passage of the chemical liquid in the opposite direction. It has. Here, the chemical injection unit 3
Is preferably provided upstream of the stopcock 413 of the flow control unit 41 (between the end of the support 2 and the stopcock 413). This is because, when the stopcock 413 and the stopcock 423 are both closed and a drug solution is injected from the drug solution injection unit 3, the balloon 1 can be filled with the drug solution. In addition, the check valve 32 and the stopcock 413 can be replaced with a three-way stopcock (not shown). It should be noted that air that has slightly entered during the injection of the chemical solution is collected by gathering the air near one of the flow control units 41 or 42 and then priming (filling the tubes 61 and 62 with the chemical solution). Can be easily drained.

The balloon 1 may be housed in a housing (not shown). The housing prevents the balloon from touching and damaging external sharp objects,
Further, when a liquid leaks from the balloon due to a defect such as a pinhole of the balloon itself, it is possible to prevent the chemical solution from scattering to the outside. The housing is preferably made of a transparent material so that the injection state of the drug solution can be visually observed from the outside. Further, a hydrophobic air filter or the like is provided on the housing so as not to affect the expansion and contraction of the balloon. Is preferably provided.

Next, an example of use of the drug solution injector of the present invention will be described with reference to the drawings. As shown in FIG. 3, the tube connection portions 414, 424 of the respective flow control portions 41, 42.
Are connected to tubes 61 and 62 made of a soft synthetic resin. With the stopcocks 413 and 423 closed, a drug solution is injected into the balloon 1 and after priming is completed, an injection needle or a catheter is connected to the other ends of the tubes 61 and 62, and the drug solution is injected into two places on the human body. For example, when cancer cells are scattered in two places in the human body, an anticancer agent can be injected into each of the cancer cell parts. In this case, it is preferable that the flow rate control pipe 412 of the first flow rate control unit 41 and the flow rate control pipe 422 of the second flow rate control unit 42 be controlled to the same flow rate. Also, the flow control pipe 41 of the first flow control unit 41
When the flow rate control pipes 422 of the second and second flow rate control sections 42 are controlled to different flow rates, the tube 61 is connected from one tube connection section 414 to the other tube connection section 424 to inject a drug solution into a human body. The amount can also be changed. In this case, the stopcocks 413 and 423 or the tubes 61 and 62 can be seen at a glance from the flow rate of the chemical solution flowing out of the flow rate control unit 41 and the flow rate of the chemical solution flowing out of the flow rate control unit 42.
It is preferable that there is an indication of the flow rate at the tip of the.

[0013]

As is apparent from the above description, the liquid injector according to the present invention is provided with outflow passages at both ends of the support supporting the balloon, and is provided with a flow control pipe in each of the outflow passages. Since the flow control units described above are connected in series, it is possible to inject a desired flow rate of the drug solution into different parts of the human body without the flow control tubes being entangled with each other.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a drug solution injector according to the present invention.

FIG. 2 is a cross-sectional view of the drug solution injector shown in FIG.

FIG. 3 is an explanatory view of a use state of the drug solution injector shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Balloon 2 Support body 21 Lumen 22 Communication hole 23, 24 Outflow path 3 Chemical liquid injection part 31 Injection port 32 Check valve 41 First flow control part 42 Second flow control part 411, 421 Chemical liquid passage 412, 422 Flow rate Control tube 413, 423 Stopcock 414, 424 Tube connection part 51, 52 Fixing ring 61, 62 Tube

Claims (1)

[Claims] 1. A medicine injecting device which accommodates a medicine in a balloon made of an elastic material and continuously injects the medicine into a human body over a long period of time by utilizing the contraction force of the balloon. A support having a hole formed in the tube wall for communicating the lumen with the outside, and an outflow passage communicating the lumen with the outside at both ends; and a cover for covering the support. A balloon tightly fixed to the outer periphery of both ends of the support, a stopcock interposed in the chemical passage communicating with the outflow passage to open and close the chemical passage, and a flow control for controlling the flow of the chemical arranged in the chemical passage A first and second flow control units connected to both ends of the support body, each of which comprises a tube and a tube connection unit to which a tube can be connected; and a flow control tube of the first flow control unit. And a chemical liquid injection section provided in the chemical liquid passage on the upstream side. Drug injection device.