JPH1147278A - Medicinal liquid injection port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a protective lock protrude from the thickness of a port main body, provide an engaging part for fingers, and facilitate a removing operation by a method wherein the protective lock is formed into a non-cylindrical shape, and at the same time, the width of the protective lock is made larger than the thickness of the port main body by rotating at a specified angle based on the port main body. SOLUTION: A protective lock 11 has a fitting hole at the center through which a catheter 21 is inserted, and the shape has dimensions wherein the protective lock does not protrude from the thickness of a port main body 1 when being fitted in the port main body 1, but the width of the protective lock 11 protrudes from the thickness of the port main body 1 when being rotated at 90 deg. based on the port main body 1. That is, the protective lock 11 has a non-cylindrical shape, and is close to a flat shape when making an extreme argument, and is preferable to have a smooth curved shape connecting the port main body 1 and the catheter 21, wherein a gap is hard to arise with a main structure when being embedded. Also, it is preferable to provide a protuberance 14 or a recess 15 for positioning of both parts on the fitting surface of the protective lock 11 with the port main body 1 so that they may be respectively fitted with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

TECHNICAL FIELD The present invention relates to an intraarterial infusion of an anticancer drug in chemotherapy for an advanced cancer patient, intravenous infusion for nutritional supplementation, administration of an analgesic to the dura mater for analgesia, and to a diabetic patient. The present invention relates to a medicinal solution injection system that can be implanted subcutaneously for continuously and periodically injecting a medicinal solution into a specific part of a patient's body for a long period of time, such as insulin administration.

2. Description of the Related Art Chemotherapy is administered to unresectable malignant tumors by administering anticancer drugs. However, systemic administration causes side effects. And the terminal was left exposed outside the body as an anticancer drug injection port, or the catheter was reinserted each time the anticancer drug was administered. (Arterial Infusion Therapy) Also, in the case of continuous infusion of high-calorie infusion, the tip of the catheter was placed in the central vein and the terminal was exposed outside the body as an infusion inlet. (IVH) For this reason, prevention of infection from the skin wound where the catheter is inserted is a matter of concern, but keeping the skin wound clean at all times is extremely difficult in real life, and the patient's free behavior and bathing are difficult. There were also restrictions on this, and this was a major obstacle to rehabilitation. As a solution to such a problem, a subcutaneously implantable catheter assembly that can be used while being left in the body for a long time has been developed. The catheter assembly has an internal space for storing a drug solution, a drug solution inlet compressed and mounted with a cylindrical elastic body communicating with the internal space, and a port body having a drug solution outflow passage provided with a connector, A catheter formed with a lumen for injecting a drug solution is connected to the connector so that the lumen communicates with the outflow channel, and a protective lock for fixing the catheter and preventing kink is fitted to the port body. It is a thing. The subcutaneous implantable catheter assembly is placed in a state where the catheter is inserted into a target blood vessel or the like and the drug solution injection port is fixed to the subcutaneous tissue. Then, when injecting the drug solution, the drug solution inlet of the drug solution injection port is confirmed by palpation from above the skin, and the drug solution is sent into the port body by puncturing the elastic body of the drug solution inlet with an injection needle,
A drug solution is injected into a target blood vessel or the like via a catheter.
However, these conventional chemical injection ports are disclosed in
A small cylindrical protection lock as described in JP-A-29269 and JP-A-8-215319;
The protection lock in the existing liquid injection port is as small as about 2 to 3 times the outer diameter of the connecting catheter and about 10 mm in total length, and is a general size in terms of reducing the indwelling space. The operation may be slippery due to blood or the like, making it extremely difficult to handle, and is particularly remarkable when the protection lock is removed again after connection for the purpose of replacement or the like.

SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem. When a non-cylindrical protection lock is rotated by 90 degrees, the width of the protection lock exceeds the thickness of the port body. Therefore, it is intended to provide a chemical liquid injection port which can be easily removed for replacement.

That is, the present invention provides an internal space for storing a chemical solution, a chemical liquid inlet communicating with the internal space, an elastic body for sealing the chemical liquid inlet, and the internal space. A drug solution outflow passage communicating with the port, a port body provided with a connector at the tip of the drug solution outflow passage, and a drug solution injection port in which a protection lock at the time of catheter connection is combined, wherein the protection lock is non-cylindrical. In addition, the chemical liquid injection port is characterized in that when it is rotated by 90 degrees with respect to the port main body, the width becomes greater than the thickness of the port main body.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic view of a liquid injection port according to the present invention, FIG. 2 is an a) top view showing one embodiment, and b) is a side sectional view. FIG. FIG. 4 is a top view showing another embodiment.
As shown in FIGS. 1 and 2, the liquid injection port of the present invention comprises a port main body (1) and a protection lock (11), and the port main body (1) has an internal space (4) for storing a chemical liquid.
A drug solution inlet (2) equipped with an elastic body (3) is provided at the upper part thereof, and a drug solution outlet channel (5) is provided in one radial direction. 6) is attached. In addition, although the chemical | medical solution outflow path (5) makes a chemical | medical solution flow out as needed, it is one of the preferable embodiments to provide a one-way valve for preventing backflow. The material of the port body (1) is required to be excellent in biocompatibility, for example, a resin such as polyurethane resin, polyether sulfone resin, silicone rubber, a metal such as stainless steel or titanium, or a combination thereof. But it doesn't matter. Further, as the material of the elastic body (3),
It is an elastic substance having self-sealing properties, for example, rubber such as silicone, isoprene, latex, etc. can be considered, but soft vinyl chloride resin or polyurethane resin can be used if it has excellent needle sticking durability and biocompatibility. . Further, the material of the connector (6) is preferably a metal such as stainless steel or titanium from the viewpoint of strength, but is not limited. The port body (1) is assembled by insert molding, bonding, welding and the like of the above-mentioned constituent members. Next, the protection lock (11) will be described. There is a fitting hole (13) for inserting the catheter (21) at the center, and the shape of the fitting hole (13) when the fitting is made to the port body (1). Although it does not protrude with respect to the thickness, when rotated 90 degrees with respect to the port body (1), the port body (1)
The width of the protection lock (11) is greater than the thickness of the protection lock (11). In other words, the protection lock (11) is non-cylindrical and almost flat when considered in extreme terms, and when implanted, it is difficult to form a gap (dead space) with body tissue and the port (1) and the catheter (2).
It is preferable to have a smooth curved shape connecting 1) and 2).
A projection (1) is provided on the fitting surface of the protection lock (11) with the port body (1) to align the two (to prevent rotation).
4) or the recesses (15) are desirably provided so as to fit each other. The material of the protection lock (11) is the same as that of the port (1), but the fitting portion of the rear end portion with the port body (1) is desirably a hard material, and the portion of the front end portion that contacts the catheter is the catheter. It is desirable that an elastic portion (12) be provided for the purpose of following the movement of the body and preventing kinks and the like. Next, a method of using the drug solution injection port according to the present invention will be described. As shown in FIG. 1, the assembling method includes the catheter (2) previously passed through the protective lock (11).
1) is inserted and connected to the connector (6) of the port body (1), and the protective lock (11) is slid over the catheter (21) to be fitted and fixed to the port body (1). Also, when removing, as shown in FIG.
When 1) is rotated 90 degrees with respect to the port body (1),
The thickness H of the port body (1) and the width W of the protection lock (11)
Since H <W, both ends of the protection lock (11) are pinched with fingers and pulled to separate them.

As described above, the chemical liquid injection port according to the present invention is extremely useful as a tool which can be easily caught by a finger because it can protrude beyond the thickness of the port body when the protective lock is rotated 90 degrees. Useful.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a chemical injection port according to an embodiment of the present invention.

FIGS. 2A and 2B are diagrams showing an embodiment of the present invention, wherein FIG. 2A is a top view and FIG.

FIG. 3 is a side view when the protection lock according to the embodiment of the present invention is rotated by 90 degrees.

FIG. 4 is a top view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chemical liquid injection port 2 Chemical liquid inlet 3 Elastic body 4 Internal space 5 Chemical liquid outflow path 6 Connector 11 Protection lock 12 Elastic part 13 Fitting hole 14 Projection 15 Depression 21 Catheter

Claims (3)

[Claims] 1. An internal space for storing a chemical solution, a chemical liquid inlet communicating with the internal space, an elastic body sealing the chemical liquid inlet, and a chemical liquid outflow passage communicating with the internal space. A liquid injection port in which a port main body having a connector at the tip of the liquid outflow path is combined with a protective lock at the time of catheter connection, wherein the protective lock has a non-cylindrical shape, and is 90 degrees with respect to the port main body. A liquid injection port characterized in that when rotated, the width becomes greater than the thickness of the port body. 2. The liquid injection port according to claim 1, wherein when the protection lock is connected to the port main body, the protection lock is integrated with the outer periphery of the port main body, and the integrated shape when viewed from the top is substantially circular. 3. The chemical injection port according to claim 1, wherein a projection or a dent to which both are fitted is provided on the port body and the protection lock for the purpose of alignment.