CN111494751A - Implantable drug delivery device - Google Patents

Abstract

The invention discloses an implantable drug delivery device, which comprises an injection seat and a catheter, wherein the top of the injection seat is provided with a soft rubber pad, the bottom and the peripheral surface of the injection seat are wrapped with an outer soft rubber layer, and the soft rubber pad and the outer soft rubber layer form a fully-wrapped elastic shell of the injection seat; the catheter passes through the outer soft rubber coating and is connected to the interface of the circumferential surface of the injection seat. The bottom surface and the periphery of the injection seat are wholly wrapped by the outer soft rubber layer, and the top of the injection seat is covered by the soft rubber pad, so that the whole appearance of the injection seat is soft and has certain elasticity, the foreign body sensation of a patient after implantation can be reduced, the material types in contact with human tissues are reduced, and the compatibility with a human body is better.

Description

Implantable Drug Delivery Device

technical field

The invention relates to the technical field of medical devices, in particular to an implantable drug delivery device.

Background technique

The implantable drug delivery device is an intravenous infusion device that can be completely implanted into the body. The catheter is placed in the superior vena cava by subcutaneous puncture by surgical methods, and the remaining catheter and implantable drug delivery device seat are buried in the subcutaneous tissue. , only a round bump can be palpated on the patient's body surface. Positioning from here during treatment, the non-invasive needle is percutaneously punctured vertically into the liquid storage tank of the injection seat, which can be used for infusion of various drugs, fluid replacement, nutritional support treatment, blood transfusion and blood sample collection. The implantable drug delivery device provides a reliable venous channel for patients who need long-term infusion therapy, and can also be used for blood sample collection. It only needs one implantation, which can reduce the pain and difficulty of repeated punctures. The operation is simple, and it is subcutaneously implanted. , reducing the risk of infection.

However, in a typical implantable drug delivery device at present, the outer layer of the injection seat is made of a hard material or a half-coated silicone material, so at least a part of the surface of the implantable drug delivery device is hard, so implantation The patient has a strong foreign body sensation after the human body.

Therefore, how to improve the comfort of the patient is a technical problem that needs to be solved by those skilled in the art.

SUMMARY OF THE INVENTION

In view of this, the object of the present invention is to provide an implantable drug delivery device, which can improve the comfort of the patient.

To achieve the above object, the present invention provides the following technical solutions:

An implantable drug delivery device, comprising an injection seat and a catheter, the top of the injection seat is provided with a soft rubber pad, the bottom and the peripheral surface of the injection seat are wrapped with an outer soft rubber layer, and the soft rubber pad and the The outer soft glue layer constitutes a fully wrapped elastic shell of the injection seat; the conduit passes through the outer soft glue layer and is connected to the interface on the peripheral surface of the injection seat.

Preferably, it also includes a ferrule, the interface protrudes from the peripheral surface of the injection seat, one end of the conduit is sleeved on the interface, and the ferrule is sleeved outside the conduit and compresses the The catheter is attached to the interface, and the outer soft glue layer further includes an interface part sleeved on the outer side of the ferrule.

Preferably, the injection seat and the ferrule are made of hard plastic.

Preferably, the material of the injection seat includes at least one of ABS, PET, PC, and POM; the material of the ferrule includes at least one of ABS, PET, PC, and POM.

Preferably, the material of the soft rubber pad includes at least one of silica gel, TPU, TPE, and rubber; the material of the outer soft rubber layer includes at least one of silica gel, TPU, TPE, and rubber.

Preferably, the outer soft adhesive layer is integrally formed.

Preferably, the end of the conduit away from the injection seat is a sealing structure, and a three-way valve opening is provided on the side wall of the conduit.

Preferably, the sealing structure is a blunt circular structure.

Preferably, the catheter is a silicone tube.

The implantable drug delivery device provided by the present invention includes an injection seat and a catheter, the top of the injection seat is provided with a soft rubber pad, the bottom and peripheral surface of the injection seat are wrapped with an outer soft rubber layer, and the soft rubber pad and the outer soft rubber layer are It constitutes a fully wrapped elastic shell of the injection seat; the conduit passes through the outer soft rubber layer and is connected to the interface on the peripheral surface of the injection seat.

The bottom surface and surrounding of the injection seat are completely wrapped by the outer soft rubber layer, and the top of the injection seat is covered by a soft rubber pad, so that the overall appearance of the injection seat is soft and has a certain elasticity, which can reduce the foreign body sensation of the patient after implantation. , and reduces the types of materials that are in contact with human tissue, and has better compatibility with the human body.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a cross-sectional view of an implantable drug delivery device provided by the present invention;

2 is a top view of the implantable drug delivery device provided by the present invention;

FIG. 3 is a structural diagram of a catheter in an implantable drug delivery device provided by the present invention.

Reference number:

1- Outsourcing soft rubber layer, 11- Interface part, 2- Injection seat, 21- Interface, 3- Soft rubber pad, 4- Card sleeve, 5- Catheter, 51- Three-way valve opening, 52- Sealing structure.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The core of the present invention is to provide an implantable drug delivery device, which can improve the comfort of the patient.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

The implantable drug delivery device provided by the present invention is specifically a disposable implantable drug delivery device, and in a specific embodiment, includes an injection seat 2 and a catheter 5 . The top of the injection seat 2 is provided with a soft rubber pad 3 , the bottom and the peripheral surface of the injection seat 2 are wrapped with an outer soft rubber layer 1 , and the soft rubber pad 3 and the outer soft rubber layer 1 constitute a fully wrapped elastic shell of the injection seat 2 . The conduit 5 passes through the outer soft rubber layer 1 and is connected to the interface 21 on the peripheral surface of the injection seat 2 . The implantable drug delivery device is surgically placed into the subcutaneous and blood vessels of the human body to establish a vascular access for drug infusion. When injecting liquid, the needle is pierced through the soft rubber pad 3 and the top of the injection seat 2 to inject liquid into the injection seat 2 .

Wherein, the soft rubber pad 3 and the outer soft rubber layer 1 are made of soft rubber elastic material, and specifically include at least one of silica gel, TPU, TPE, and rubber. The soft rubber pad 3 or the outer soft rubber layer 1 can be made of only one of the above materials, preferably silica gel, which has better biocompatibility, little impact on the human body, and good durability. Reduce implantation risk. In addition, the soft rubber pad 3 and the outer soft rubber layer 1 can be made of the same material or different materials.

In this embodiment, the bottom surface and the periphery of the injection seat 2 are integrally wrapped by the outer soft rubber layer 1, and the top of the injection seat 2 is covered by the soft rubber pad 3, so that the overall appearance of the injection seat 2 is soft and has a certain elasticity , which can reduce the foreign body sensation of the patient after implantation, and reduce the types of materials that are in contact with human tissue, and have better compatibility with the human body.

Further, the implantable drug delivery device also includes a ferrule 4 . The interface 21 of the injection seat 2 protrudes from the peripheral surface of the injection seat 2 . Correspondingly, the outer soft glue layer 1 further includes an interface portion 11 sleeved on the outer side of the ferrule 4 . The injection seat 2 and the ferrule 4 are made of hard plastic, and the rigid plastic specifically includes at least one of ABS, PET, PC, and POM to ensure the strength of the injection seat 2 and the ferrule 4 . Specifically, the injection seat 2 or the ferrule 4 can be made of only one of the above materials. In addition, the injection seat 2 and the ferrule 4 can be made of the same material or different materials. Since the outer side of the ferrule 4 is also covered by the outer soft rubber layer 1, the foreign body sensation of the patient after implantation can be further reduced.

Further, the outer soft rubber layer 1 is integrally formed, specifically, injection molding. Of course, in other embodiments, the outer soft rubber layer 1 can also be a separate structure, which is produced through an assembly process, and each part cooperates to wrap the injection seat 2 .

Further, the end of the catheter 5 away from the injection seat 2 is a sealing structure 52 , and a three-way valve opening 51 is opened on the side wall of the catheter 5 . The three-way valve design allows the valve to open inward during suction, showing a negative pressure, and blood can be drawn; during infusion, the valve opens outward, showing a positive pressure, and can be administered; when the catheter is not used, the valve is closed, which can improve blood drawing. It can effectively reduce the blood return and air intake during intermittent treatment. Compared with the openings of other structures, the three-way valve can ensure that it can be effectively opened inward or outward when infusion or blood is drawn, and can be kept closed when not in use to reduce air embolism and blood reflux. and condensation. More specifically, the sealing structure 52 is a blunt circular structure to reduce the foreign body sensation at the catheter 5 . In addition, the catheter 5 is a silicone tube to improve compatibility with the human body.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The implantable drug delivery device provided by the present invention has been described in detail above. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (9)

1. An implantable drug delivery device, characterized in that it comprises an injection seat (2) and a conduit (5), the top of the injection seat (2) is provided with a soft rubber pad (3), and the injection seat (2) is provided with a soft rubber pad (3). ) bottom and peripheral surface are wrapped with the outer cover soft rubber layer (1), and the described soft rubber pad (3) and the described outer cover soft glue layer (1) constitute the fully wrapped elastic shell of the described injection seat (2); The conduit (5) passes through the outer soft rubber layer (1) and is connected to the interface (21) on the peripheral surface of the injection seat (2). 2 . The implantable drug delivery device according to claim 1 , further comprising a ferrule ( 4 ), the interface ( 21 ) protruding from the peripheral surface of the injection seat ( 2 ), and the One end of the conduit (5) is sleeved on the interface (21), and the ferrule (4) is sleeved on the outside of the conduit (5) and presses the conduit (5) on the interface (21) , the outer soft glue layer (1) further comprises an interface part (11) sleeved on the outer side of the ferrule (4). 3 . The implantable drug delivery device according to claim 2 , wherein the injection seat ( 2 ) and the ferrule ( 4 ) are made of hard plastic. 4 . 4. The implantable drug delivery device according to claim 3, wherein the material of the injection seat (2) comprises at least one of ABS, PET, PC, and POM; the ferrule (4) The material includes at least one of ABS, PET, PC, POM. 5. The implantable drug delivery device according to claim 2, wherein the material of the soft rubber pad (3) comprises at least one of silica gel, TPU, TPE, and rubber; the outer soft rubber layer is The material of (1) includes at least one of silicone, TPU, TPE, and rubber. 6 . The implantable drug delivery device according to claim 1 , wherein the outer soft glue layer ( 1 ) is integrally formed. 7 . 7. The implantable drug delivery device according to any one of claims 1 to 6, wherein the end of the conduit (5) away from the injection seat (2) is a sealing structure (52), and the A three-way valve opening (51) is opened on the side wall of the catheter (5). 8. The implantable drug delivery device according to claim 7, wherein the sealing structure (52) is a blunt-round structure. 9. The implantable drug delivery device according to claim 7, wherein the conduit (5) is a silicone tube.

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