CN219847810U

CN219847810U - Implantable infusion device

Info

Publication number: CN219847810U
Application number: CN202321242557.7U
Authority: CN
Inventors: 李林勍; 江兴华
Original assignee: Second Xiangya Hospital of Central South University
Current assignee: Second Xiangya Hospital of Central South University
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-10-20
Anticipated expiration: 2033-05-22

Abstract

The utility model belongs to the technical field of medical devices, and discloses an implantable infusion device which comprises an infusion port and a catheter, wherein the infusion port comprises a shell with front and rear openings, a titanium inner cavity with front and rear openings is arranged in the shell, the end face of the rear end of the titanium inner cavity is an inclined plane, the tail end of the titanium inner cavity is provided with a silica gel puncture diaphragm, the catheter is communicated with the infusion port through a catheter locking structure, the surface of the catheter is provided with a first metal stimulation ring and a second metal stimulation ring, and the outer wall of the catheter is provided with a Carff ring; the implanted infusion device has the advantages that the implanted port and the catheter are fully implanted into the subcutaneous part of a patient, so that retrograde infection of the catheter is avoided, the problem that the external catheter is easy to accidentally separate and pull or break is avoided, and the comfort level of the patient is improved; the wound of the subcutaneous puncture indwelling catheter is conveniently sealed and treated by arranging the kafu fixation on the surface of the catheter, so that the formation of cerebrospinal fluid leakage is avoided, and the risk that the subcutaneous tunnel bacterial infection enters the vertebral canal along the catheter is avoided.

Description

Implantable infusion device

Technical Field

The utility model relates to an implantable infusion device, and belongs to the technical field of medical devices.

Background

The intraspinal administration technology comprises the epidural cavity and subarachnoid cavity administration technology, a catheter is placed into the epidural cavity or subarachnoid cavity in the spinal canal by a percutaneous puncture minimally invasive method, and therapeutic drugs are administered or cerebrospinal fluid is drained, so that the operations of central nervous administration analgesia, chemotherapy, perfoliate infection, spasmolysis and the like in various clinical treatments or cerebrospinal fluid drainage, replacement, pressure measurement and the like are achieved, and the advantages of minimally invasive operation and convenience in blood brain barrier administration are achieved.

The catheters in the existing intraspinal drug delivery technology are mostly external, and have the following problems and disadvantages:

(1) Catheter-external related infection: at present, after the catheter is kept outside the body through a puncture point and exposed and kept for a long time, bacteria around wounds of the skin of the catheter are easy to invade, retrograde infection is carried out along a subcutaneous tunnel of the catheter, and central abscess, bacteremia or sepsis occurs in severe cases;

(2) Nursing difficulty: the current catheter is exposed and fixed on the skin, so that the catheter is easy to accidentally separate during daily life such as bath or sports, and is pulled or broken, thereby causing inconvenience or serious psychological burden to the daily life of a patient;

(3) Cerebrospinal fluid leakage: because of the pressure in the subarachnoid space, cerebrospinal fluid will normally leak back out of the catheter along the catheter and subcutaneous tunnel, continually leaking out of the body or into the subcutaneous sac to form a pseudocyst;

(4) Comfort level is poor: the existing subcutaneous implantation section of the dialysis catheter has a small bending angle with the subcutaneous tunnel section at the internal jugular vein puncture position, so that the bending section of the local catheter continuously forms tension compression on surrounding local skin or subcutaneous soft tissues, and discomfort of the neck of a patient is easily caused;

(5) The catheter positioning is not accurate: the current imbedding depth of the intraspinal catheter is generally determined by approximately estimating the bone anatomical marker position of the human body or under the radioactive projection in the operation, and often has low positioning precision or can not timely find and judge whether the catheter is implanted into the subarachnoid space under certain special conditions.

Disclosure of Invention

The object of the present utility model is to provide an implantable infusion device.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides an implantable infusion device, includes infusion port and pipe, the infusion port includes front and back open-ended shell, the inside open-ended titanium metal inner chamber around being equipped with of shell, the terminal surface of titanium metal inner chamber rear end is the inclined plane, the opening of titanium metal inner chamber rear end flushes with the opening of shell rear end, titanium metal inner chamber tail end is equipped with silica gel puncture diaphragm, the pipe is linked together in the opening of shell front end through pipe locking structure and outstanding in titanium metal inner chamber front end, the rear portion of pipe is equipped with first metal stimulation ring, front end is equipped with the second metal stimulation ring, the pipe outer wall is equipped with the karf ring.

Preferably, a limiting ring is arranged at the opening at the rear end of the shell.

Preferably, the shell comprises a rear shell wrapped on the rear outer wall of the titanium inner cavity and a front shell wrapped on the front outer wall of the titanium inner cavity, and the front shell and the rear shell are integrally connected.

Preferably, the included angle between the end face of the rear end of the titanium metal inner cavity and the axis of the infusion port is 0-90 degrees.

Preferably, the tail end of the infusion port is triangular, and the closed end of the front end of the catheter is in a passivated conical shape or a hemispherical shape.

Preferably, the catheter locking structure comprises a catheter locking interface fixedly connected with the front end opening of the titanium metal inner cavity, the catheter locking interface is of a hollow truncated cone-shaped structure, and a joint sleeve sleeved outside the catheter locking interface is fixedly connected to the rear end of the catheter.

Preferably, a catheter guide wire channel and a catheter infusion channel are arranged in the catheter 6, and the catheter guide wire channel, the catheter infusion channel and the catheter are integrally formed.

Preferably, a metal guide wire is arranged in the guide wire channel of the catheter, and the metal guide wire is connected with the first metal stimulation ring and the second metal stimulation ring.

Preferably, the outer wall of the first metal stimulation ring is clamped with a metal buckle, and an extension wire electrically connected with an external electric stimulation instrument is arranged on the metal buckle.

Preferably, the side wall of the front end of the catheter is provided with more than two side holes, and the side holes are arranged on the side wall of the catheter in a non-linear manner.

Advantageous effects

1. The implanted infusion device disclosed by the utility model has the advantages that the infusion port and the catheter are fully implanted into the subcutaneous part of a patient, so that retrograde infection of the catheter is avoided, the external catheter is easy to accidentally separate during daily life such as bathing or sports, and the problems of inconvenience or serious psychological burden are caused to the daily life of the patient due to traction or breakage, and the comfort level of the patient is improved; the unique overall triangle outline at the tail end of the infusion port is beneficial to increasing the touch hand feeling, is convenient for subcutaneous positioning of a silica gel puncture diaphragm, and improves the percutaneous puncture success rate of a nondestructive puncture needle; the wound of the subcutaneous puncture indwelling catheter is conveniently sealed and treated by arranging the kafu fixation on the surface of the catheter, so that the formation of cerebrospinal fluid leakage is avoided, and the risk that the subcutaneous tunnel bacterial infection enters the vertebral canal along the catheter is avoided.

2. According to the implantable infusion device, the inclined silica gel at the tail end of the infusion port at 0-90 degrees punctures the end face of the diaphragm, so that the puncture of the straight type nondestructive puncture needle is realized, and meanwhile, the nondestructive puncture needle can be integrally adhered to the skin for fixation, so that daily nursing is facilitated, and the infusion device is not easy to fall off;

3. the implanted infusion device has the electrophysiological positioning function, can accurately judge the position of the head end of the catheter in the vertebral canal, and improves the convenience and success rate of operation.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the front end of the catheter according to the present utility model;

fig. 3 is a schematic diagram of a connection structure between a first metal stimulation ring and an electro-stimulator according to the present utility model.

In the figure: 1. a housing; 2. a conduit; 3. a titanium metal lumen; 4. a silica gel puncture diaphragm; 5. a liquid storage cavity; 6. a first metal stimulation ring; 7. a second metal stimulation ring; 8. a kaff ring; 9. a limiting ring; 10. a rear housing; 11. a front housing; 12. a catheter lock interface; 13. a joint sleeve; 14. a catheter guidewire channel; 15. a catheter infusion channel; 16. a metal guide wire; 17. a side hole; 18. a atraumatic puncture needle; 19; a closed end; 20. a metal buckle; 21. and (5) extending the lead.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

As shown in fig. 1-3, the present utility model provides a technical solution: an implantable infusion device comprises an infusion port and a catheter 2, wherein the infusion port comprises a shell 1 with front and rear openings, a titanium inner cavity 3 with front and rear openings is arranged in the shell 1, the titanium inner cavity 3 is a hollow integrated part, the outer wall of the titanium inner cavity 3 is fixedly connected with the inner wall of the shell 1, the end face of the rear end of the titanium inner cavity 3 is an inclined plane, the included angle between the plane of the end face of the rear end of the titanium inner cavity 3 and the axis of the infusion port is 0-90 degrees, the opening of the rear end of the titanium inner cavity 3 is flush with the opening of the rear end of the shell 1, the tail end of the titanium inner cavity 3 is provided with a silica gel puncture diaphragm 4, the end face of the rear end of the silica gel puncture diaphragm 4 is flush with the opening of the rear end of the titanium inner cavity 3, a drug delivery or drainage passage is built by the non-invasive puncture needle 18 penetrating the silica gel puncture diaphragm 4 into the inner cavity 5 of the titanium inner cavity 3 in a percutaneous way, the silica gel puncture diaphragm 4 is blocked at the rear part of the titanium inner cavity 3, the front part of the titanium metal inner cavity 3 is a liquid storage cavity 5, the opening at the rear end of the shell 1 is provided with a limiting ring 9, the inner diameter of the limiting ring 9 is smaller than the outer diameter of the silica gel puncture diaphragm 4, the limiting ring 9 is used for blocking the silica gel puncture diaphragm 4 from being pulled out outwards, the tail end of the infusion port is triangular, the touch feeling is favorably increased, the subcutaneous positioning of the silica gel puncture diaphragm 4 is facilitated, the percutaneous puncture success rate of a nondestructive puncture needle 18 is improved, the catheter 2 is made of soft polyurethane, the surface of the catheter 2 is provided with an ultra-smooth anticoagulant coating, the catheter 2 is 9F-15F specification, the catheter 2 is communicated with the opening of the front end of the titanium metal inner cavity 3 protruding out of the front end of the shell 1 through a catheter locking structure, the rear part of the catheter 2 is provided with a first metal stimulation ring 6, the front end is provided with a second metal stimulation ring 7, the first metal stimulation ring 6 and the second metal stimulation ring 7 are exposed on the outer wall of the catheter 2, through setting up first metal stimulation ring 6 and second metal stimulation ring 7 and making pipe 2 have electrophysiology locate function, can accurately judge the intraductal position of pipe 2 head end, improve the convenience and the success rate of operation, the pipe 2 outer wall is equipped with the karff ring 8, the karff ring 8 is dacron material, the detachable setting of karff ring 8 in this embodiment is on pipe 2, the karff ring 8 side is equipped with the opening, the dismouting karff ring 8 of being convenient for, the karff ring 8 both sides are provided with the needle passageway, be convenient for sew up, and then be convenient for fix the karff ring 8 on pipe 2 outer wall, the karff ring 8 in this embodiment is used for the wound closure processing of catheter 2 is kept somewhere in the puncture under skin, the formation of cerebrospinal fluid hourglass is avoided to the maximum extent, avoid the risk that the bacterial infection of subcutaneous tunnel gets into the intraductal along pipe 2 simultaneously, the blind end 19 of pipe 2 front end is the conical or hemispherical of passivation, be convenient for implant pipe 2.

The shell 1 comprises a rear shell 10 wrapped on the rear outer wall of the titanium inner cavity 3 and a front shell 11 wrapped on the front outer wall of the titanium inner cavity 3, and the front shell 11 and the rear shell 10 are integrally connected.

The catheter locking structure comprises a catheter locking interface 12 fixedly connected with the front end opening of the titanium inner cavity 3, the catheter locking interface 12 is of a hollow truncated cone-shaped structure, the diameter of a large circle of the truncated cone-shaped catheter locking interface 12 is larger than the outer diameter of the front end opening of the titanium inner cavity 3, a joint sleeve 13 is sleeved outside the catheter locking interface 12, a truncated cone-shaped clamping groove is formed in the joint sleeve 13, the truncated cone-shaped clamping groove is in interference fit with the catheter locking interface 12, and the joint sleeve 13 is fixedly connected to the rear end of the catheter 2 and communicated with the catheter 2.

The catheter 2 is internally provided with a catheter guide wire channel 14 and a catheter infusion channel 15, the diameter of the catheter guide wire channel 14 is smaller than that of the catheter infusion channel 15, the catheter guide wire channel 14, the catheter infusion channel 15 and the catheter 2 are integrally formed, the catheter guide wire channel 14 is internally provided with a metal guide wire 16, two ends of the metal guide wire 16 are connected with the first metal stimulation ring 6 and the second metal stimulation ring 7, two ends of the metal guide wire 16 are respectively welded with the first metal stimulation ring 6 and the second metal stimulation ring 7, the outer wall of the first metal stimulation ring 6 is clamped with a metal buckle 20, the metal buckle 20 is detachably connected with the first metal stimulation ring 6, the metal buckle 20 in the embodiment is a C-shaped buckle, the inner wall is attached to the outer wall of the first metal stimulation ring 6, and an extension lead 21 electrically connected with an external electrical stimulation instrument is arranged on the metal buckle 20.

The side wall of the front end of the catheter 2 is provided with more than two side holes 17, in the embodiment, the number of the side holes 17 is 3-6, and the side holes 17 are arranged on the side wall of the catheter 2 in a non-linear manner.

The use method of the utility model comprises the steps of implanting a catheter 2 and an infusion port into the skin of a patient, connecting and communicating the catheter 2 and the infusion port through a catheter locking structure, clamping a metal buckle 20 on a first metal stimulation ring 6, accurately judging the position of the head end of the catheter 2 through a first metal stimulation ring 6 and a second metal stimulation ring 7 on the surface of the catheter 2 by using accurate feeling or motion induction test, accurately implanting the catheter 2, taking down the metal buckle 20 after the catheter 2 is implanted into a proper position, fixing a kafu ring 8 on the catheter 2, and suturing an implantation wound, thus the implantation of the device can be completed, the puncture needle penetrates through a silica gel puncture membrane 4 after penetrating through the skin tissue of the patient when the liquid medicine is required to be infused, the liquid medicine is injected into a liquid storage cavity 5 of a titanium metal cavity 3, and is conveyed to a medicine-required position under the drainage of the titanium metal cavity 3 and the catheter 2, and body fluid can be led out of the body through the device.

Claims

1. An implantable infusion device comprising an infusion port and a catheter (2), characterized in that: the infusion port comprises a front-back opening shell (1), a front-back opening titanium inner cavity (3) is formed in the shell (1), the end face of the rear end of the titanium inner cavity (3) is an inclined plane, the opening of the rear end of the titanium inner cavity (3) is flush with the opening of the rear end of the shell (1), a silica gel puncture diaphragm (4) is arranged at the tail end of the titanium inner cavity (3), a catheter (2) is communicated with the opening of the front end of the shell (1) by a catheter locking structure, a first metal stimulation ring (6) is arranged at the rear part of the catheter (2), a second metal stimulation ring (7) is arranged at the front end of the catheter, and a Carff ring (8) is arranged on the outer wall of the catheter (2).

2. An implantable infusion device according to claim 1, wherein: a limiting ring (9) is arranged at the opening of the rear end of the shell (1).

3. An implantable infusion device according to claim 1, wherein: the shell (1) comprises a rear shell (10) wrapped on the rear outer wall of the titanium inner cavity (3) and a front shell (11) wrapped on the front outer wall of the titanium inner cavity (3), the front shell (11) and the rear shell (10) are integrally connected, and the first metal stimulation ring (6) and the second metal stimulation ring (7) are exposed out of the outer wall of the catheter (2).

4. An implantable infusion device according to claim 1, wherein: the included angle between the end face of the rear end of the titanium metal inner cavity (3) and the axis of the infusion port is 0-90 degrees.

5. An implantable infusion device according to claim 1, wherein: the tail end of the infusion port is triangular, and the closed end (19) of the front end of the catheter (2) is in a passivated conical shape or a hemispherical shape.

6. An implantable infusion device according to claim 1, wherein: the catheter locking structure comprises a catheter locking interface (12) fixedly connected with the front end opening of the titanium inner cavity (3), the catheter locking interface (12) is of a hollow truncated cone-shaped structure, a joint sleeve (13) is sleeved outside the catheter locking interface (12), and the joint sleeve (13) is fixedly connected to the rear end of the catheter (2).

7. An implantable infusion device according to claim 1, wherein: a catheter guide wire channel (14) and a catheter infusion channel (15) are arranged in the catheter (2), and the catheter guide wire channel (14), the catheter infusion channel (15) and the catheter (2) are integrally formed.

8. An implantable infusion device according to claim 1, wherein: a metal guide wire (16) is arranged in the guide wire channel (14), and two ends of the metal guide wire (16) are respectively connected with the first metal stimulation ring (6) and the second metal stimulation ring (7).

9. An implantable infusion device according to claim 1, wherein: the outer wall of the first metal stimulation ring (6) is connected with a metal buckle (20) in a clamping mode, and an extension lead (21) electrically connected with an external electric stimulation instrument is arranged on the metal buckle (20).

10. An implantable infusion device according to claim 1, wherein: the side wall of the front end of the catheter (2) is provided with more than two side holes (17), and the side holes (17) are arranged on the side wall of the catheter (2) in a non-linear manner.