JPH11155958A - Medicinal liquid injecting port - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it less invasive and safer by a method wherein a recessed part having a connector for the attaching of a protective lock is formed on the port main body in the medicinal liquid flow-out passage direction of a drug liquid injecting port, and the protective lock is formed in such a manner that the appearance at the time of fitting may meet the outer shape of the port main body, and the surface is covered with a flexible material of a specified Shore hardness. SOLUTION: This medicinal liquid injecting port is constituted of a port main body 1 and a protective lock 11, and in the port main body 1, an internal space 4 for drug liquid storage and a medicinal liquid injecting port 2 on which an elastic body 3 is fitted are provided. Also, a recessed part 9 is formed for the outer peripheral surface of the port main body 1 in one radial direction, and a medicinal liquid flow-out passage 5 is formed by providing a connector 6. Then, a shape being seen from the side surface when the protective lock 11 is fitted, is made to approx. meet the outer periphery of the port main body 1. The outer peripheral part of the port main body 1 is covered with a flexible material of which the Shore hardness is in a range of 30-70 degrees. By this constitution, the maximum length of a rigid part becomes shorter, and it is made less invasive for a patient, and safer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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.

[0002]

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)

[0003] For this reason, prevention of infection from the skin wound where a 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 passage. Further, a protective lock for fixing the catheter and preventing kink (bending) is provided on the port body. They are fitted.

The subcutaneous implantable catheter assembly is placed in a state where a catheter is inserted into a target blood vessel or the like and a drug solution injection port is fixed to a subcutaneous tissue. Then, when injecting the drug solution, the drug solution inlet port 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 port with a syringe needle. A drug solution is injected into a target blood vessel or the like via the.

However, in the conventional product, a connector is attached to the outer periphery of the port body, and the protective lock connected and fixed by screw fitting or the like further projects beyond the connector tip in order to prevent the catheter from kinking at the connector tip. It is designed to be. Therefore, when the subcutaneous implantable catheter assembly is implanted subcutaneously, the implant space around the outer periphery of the port body is not enough, and it is necessary to make a deep incision on the vertical line of the catheter including the space including the protective lock. Not only is the burden heavy, but it is difficult for the surgeon to confirm the liquid inlet, and the longer the straight line (the longer the hard part) including the port body and the protective lock, the more difficult it is for the patient to follow the movement of the patient, and There is a high possibility that various accidents such as will occur.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to reduce problems such as catheter kinks in the prior art, and to provide a soft outer periphery when a port body and a protective lock are fitted. The covering with the material further shortens the maximum length of the rigid portion, and provides a less invasive and safe liquid injection port for the patient.

[0007]

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 port body provided with a connector at the tip of the drug solution outflow path, and a drug injection port combining a protection lock at the time of catheter connection, wherein the port body only in the drug solution outflow direction. Make a recess,
The connector is installed in the recess, and the appearance when the protection lock is fitted into the recess of the port body is substantially integrated with the outer periphery of the port body, and at that time, the outer peripheral portion that appears on the surface Are all covered with a soft material with a hardness in the range of 30 to 70 degrees Shore A hardness, and compressively fix the needle receiving part that forms the internal space for storing the chemical solution and the elastic body that seals the chemical solution inlet The chemical liquid injection port is characterized in that the holding portion and the connector are hard materials.

[0008]

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, and FIG. 2 is a plan view (a) and a side sectional view (b) showing one 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). The port main body (1) has an internal space (4) for storing a chemical liquid. A chemical liquid inlet (2) having an elastic body (3) mounted thereon, and a chemical liquid outflow passage (5) provided in one radial direction. The port body (1) in that direction has a concave portion (9) with respect to the outer periphery. ), And a connector (6) for connecting a catheter (21) is provided at the center of the concave portion (9). That is, the external appearance of the port body (1) viewed from above is a shape in which a part of the disk shape is missing. In addition, the appearance seen from the side has a shape bulging up and down. 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 made of a combination of a soft material and a hard material, and a needle receiving portion (7) forming an internal space (4) for storing a chemical solution is provided so that an injection needle does not penetrate. A holding part (8) for notifying by a tactile sensation that the tip of the injection needle has completely reached the internal space (4), and for compressing and fixing an elastic body (3) for sealing the chemical liquid inlet (2). ) Applies a strong compressive force to the elastic body (3),
The needle receiving part (7) and the holding part (8) located inside the port body (1) are made of a hard material, and the outer peripheral part of the other port body (1) is 30 degrees Shore A hardness. And a soft material having a hardness ranging from 70 degrees to 70 degrees. To give a specific example of each material, it is necessary to have excellent biocompatibility, for example, a hard material such as polyether sulfone resin, resin such as polyacetal resin and stainless steel,
It is a metal such as titanium, and a soft material is a resin such as a polyurethane resin or a silicone rubber.

Next, the material of the elastic body (3) is an elastic substance having a self-sealing property, for example, rubber such as silicone rubber, isoprene rubber, latex, etc., but soft vinyl chloride resin or polyurethane resin. However, it 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 protective lock (11) will be described. The appearance is the same as the disc-shaped missing portion of the port body (1), and the fitting hole (1) for inserting the catheter (21) in the center is provided.
2), the material is the same as that of the port (1), and the fitting portion of the rear end portion with the port body (1) is desirably a hard material for holding and fixing the catheter end. ), The outer peripheral portion located on the surface is made of a soft material.

Next, a method of using the liquid injection port according to the present invention will be described. As shown in FIG. 1, the assembling method is as follows. A catheter (21) previously passed through a protection lock (11) is inserted and connected to a connector (6) of a port body (1), and further, the protection lock (11) is connected to a catheter (21). Slide up to fit and secure to port body (1). At this time, the liquid injection port of the present invention has a disk shape without the protection lock (11) protruding, and further has a body structure when subcutaneously buried under a subcutaneous shape when viewed from the side because the shape is swollen up and down. It is difficult to form a dead space (gap).

[0012]

As described above, when the liquid injection port according to the present invention is fitted with the port main body and the protection lock, the liquid injection port has a streamlined disk shape with no protruding portion, and the outer periphery is covered with a soft material so as to be hard. Since the partial maximum length is short, it is extremely useful as a minimally invasive and safe tool for patients.

[Brief description of the drawings]

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

FIG. 2 is a view showing one embodiment of the present invention, wherein (a) is a plan view and (b) is a side sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Port main body 11 Protective lock 2 Chemical liquid inlet 12 Fitting hole 3 Elastic body 21 Catheter 4 Internal space 5 Chemical liquid outflow path 6 Connector 7 Needle receiving part 8 Elastic body holding part 9 Recess

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 port body provided with a connector at the tip of the drug solution outflow path, and a drug solution injection port combining a protection lock at the time of catheter connection, wherein the port body forms a recess only in the direction of the drug solution outflow path, and the recess is formed in the recess. A connector is installed, and the appearance when the protective lock is fitted into the concave portion of the port body is substantially integrated with the outer periphery of the port body, and at this time, the outer peripheral portion that appears on the surface is entirely Shore A hardness. A chemical injection port, which is covered with a soft material having a hardness in a range from 30 degrees to 70 degrees. 2. The port body, wherein a needle receiving portion forming an internal space for storing a drug solution, a holding portion for compressing and fixing an elastic body sealing a drug solution inlet, and a connector are hard materials. Liquid injection port. 3. The chemical liquid injection port according to claim 1, wherein when the port body and the protection lock are fitted together, the shape as viewed from the side has a vertically swelling shape.