CN218923534U

CN218923534U - Adjustable bending medical device

Info

Publication number: CN218923534U
Application number: CN202221632743.7U
Authority: CN
Inventors: 顾延君
Original assignee: Wantao Medical Technology Jiangsu Co ltd
Current assignee: Wantao Medical Technology Jiangsu Co ltd
Priority date: 2022-06-27
Filing date: 2022-06-27
Publication date: 2023-04-28
Anticipated expiration: 2032-06-27

Abstract

The utility model discloses a bendable medical device, which comprises a catheter with an intermediate layer and a control handle, wherein the control handle comprises: the catheter comprises a catheter connector sleeved on a catheter, a rotating block connected with the catheter connector, a luer connector sleeved on the tail of the catheter, a first catheter groove covered on the catheter and two ends of the catheter are respectively connected with the rotating block and the luer connector, a second catheter groove spliced with the first catheter groove, a traction wire passing through the first catheter groove and one end of the traction wire located in the middle layer of the catheter, a traction wire fixing block provided with a first groove and connected with the other end of the traction wire, and a transmission block provided with a second groove and connected with the traction wire fixing block. The utility model has the advantages that: the catheter has a radial multilayer structure of an inner liner tube, a middle layer framework and an outer layer tube; the framework has a knitting structure and good support property; the distal single spring coil ensures that the catheter maintains sufficient rigidity, has good compliance, is flexible to turn, and is easy to pass through tortuous vessels.

Description

Adjustable bending medical device

Technical Field

The utility model belongs to the technical field of medical treatment, and particularly relates to an adjustable bending medical device.

Background

Interventional medicine is a new technology which is rapidly developed in recent years, and is a problem which needs to be solved as a medical instrument to be inserted into a human body and popularized for vascular injury and clinical operation of the human body. The prior interventional catheter basically carries out shaping processing on the head of the catheter according to the distribution shape of the blood vessel of a human body or the structure of the human body, and combines different shapes and structures to customize the catheters with different shapes so as to meet the requirement of reaching a lesion part in a roundabout blood vessel. In view of the other requirements of catheter use, the catheter must have a degree of rigidity to ensure that the physician can rotate or pull the catheter in the body while holding the tail for operation so that the catheter head enters the tortuous vessel. But also has enough toughness to ensure that the bending part can bend along with the natural bending part of the blood vessel, so that the bending part at the front end of the catheter is in line with the natural curvature of the blood vessel of a human body as much as possible. Even if the methods are adopted, the damage to the vessel wall is not avoided, because the completely shaped polymer material or the catheter has certain rigidity, the damage to the vessel wall and even the rupture are easily caused due to the expansion of the blood vessel by bending shaping in the whole conveying process, and the whole process needs to be performed by a doctor with abundant experience, otherwise, the catheter or the medicine cannot be conveyed to the lesion part.

Disclosure of Invention

The utility model aims at: the utility model provides a but bending-adjustable medical device can make the distal end of bending-adjustable medical device form different curved shapes in time through controlling the bending-adjustable handle, and different curved shapes can be close human lumen different positions department respectively and then be applied to the endovascular passageway construction.

The technical scheme of the utility model is as follows: an adjustable bend medical device comprising: having an intermediate layer catheter, a control handle, wherein the control handle comprises: the catheter comprises a catheter connector sleeved on a catheter, a rotating block connected with the catheter connector, a luer connector sleeved on the tail of the catheter, a first catheter groove covered on the catheter and connected with the rotating block and the luer connector at two ends respectively, a second catheter groove spliced with the first catheter groove, a traction wire penetrating through the first catheter groove and provided with one end at the middle layer of the catheter, a traction wire fixing block provided with a first groove and connected with the other end of the traction wire, a transmission block provided with a second groove and connected with the traction wire fixing block, a first front shell covered on the upper part of the first catheter groove, a first rear shell covered on the upper part of the first catheter groove and connected with the first front shell, a second front shell covered on the lower part of the second catheter groove and a second rear shell covered on the lower part of the second catheter groove and connected with the second front shell.

On the basis of the technical scheme, the method further comprises the following auxiliary technical scheme:

the outer diameter of the catheter is 2.03mm-2.7mm, the inner diameter is 1.81mm-2.3mm, the outer layer is made of nylon, polyether amide and polyurethane, the middle layer is made of stainless steel or nickel-titanium alloy, and the inner layer is made of polytetrafluoroethylene.

The intermediate layer comprises a developing mark, the material of the developing mark is gold, tantalum, platinum iridium alloy and platinum tungsten alloy which are not transparent to X-rays, the developing mark is in a ring-shaped appearance, and the wall thickness is 0.02-0.15mm. The developing mark is fixed by means of mechanical crimping, glue bonding, brazing, laser welding and the like.

The traction wire is a stainless steel wire with a polytetrafluoroethylene coating, the diameter of the traction wire is 0.08-0.16mm, and the traction wire passes through the first groove and the second groove.

The first conduit groove is provided with a third groove, and the traction wire fixing block and the transmission block are buried in the third groove.

The utility model has the advantages that: the catheter has a radial multilayer structure of an inner liner tube, a middle layer skeleton and an outer layer tube. The framework has a knitting structure and good support property; the distal single spring coil ensures that the catheter maintains sufficient rigidity, has good compliance, is flexible to turn, and is easy to pass through tortuous vessels.

The outer sleeve is provided with an axial multi-section structure from the proximal end to the distal end, and is divided into a plurality of different sections according to the material hardness sequence, and the sections are gradually changed from the proximal end to the distal end; the two adjacent sections of outer sleeves are provided with the characteristic of the inclined cutting joint part, so that a more gentle natural transition is formed, and the flexibility and the support of the whole catheter are better considered.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of the present utility model;

FIG. 2 is a block diagram of an intermediate layer of a catheter in accordance with the present utility model;

FIG. 3 is a state diagram of the utility model before the rotating block and the transmission block move cooperatively;

FIG. 4 is a state diagram of the utility model after the rotating block and the driving block move cooperatively;

FIG. 5 is a state diagram of the catheter before bending;

fig. 6 is a state diagram of the catheter after bending.

Detailed Description

Examples: referring to fig. 1-4, an embodiment of a bending-adjustable medical device is disclosed, comprising: a catheter 1 with an intermediate layer, a control handle 2, wherein the control handle comprises: the catheter comprises a catheter connector 100 sleeved on a catheter 1, a rotating block 200 connected with the catheter connector 100, a luer connector 300 sleeved on the tail of the catheter 1, a first catheter groove 400 covered on the catheter 1 and connected with the rotating block 200 and the luer connector 300 at two ends respectively, a second catheter groove 500 spliced with the first catheter groove 400, a traction wire 600 passing through the first catheter groove 400 and having one end positioned in the middle layer of the catheter 1, a traction wire fixing block 700 provided with a first groove 701 and connected with the other end 600 of the traction wire, a transmission block 800 provided with a second groove 801 and connected with the traction wire fixing block 700, a first front shell 10 covered on the upper part of the first catheter groove 400, a first rear shell 20 covered on the upper part of the first catheter groove 400 and connected with the first front shell 10, a second front shell 30 covered on the lower part of the second catheter groove 500 and spliced with the first front shell 10, and a second rear shell 40 covered on the lower part of the second catheter groove 500 and spliced with the first rear shell 20.

The outer diameter range of the catheter 1 is 2.03mm-2.7mm, the inner diameter range is 1.81mm-2.3mm, the outer layer is made of nylon, polyether amide and polyurethane, the middle layer comprises a winding spring 101 and a braiding structure 102, the material is stainless steel or nickel-titanium alloy, and the inner layer is made of polytetrafluoroethylene.

The intermediate layer also comprises a development mark 103, the material of which is gold, tantalum, platinum iridium alloy and platinum tungsten alloy which are not transparent to X-rays, the development mark 103 is in an annular shape, and the wall thickness of the development mark is 0.02-0.15mm. The developing mark 103 is fixed by mechanical crimping, glue bonding, brazing, and laser welding.

The middle layer also includes a traction wire 600 which is a stainless steel wire with a polytetrafluoroethylene coating and has a diameter of 0.08-0.16mm.

The first guide groove 400 is provided with a third groove 401, and the traction wire fixing block 700 and the transmission block 800 are buried in the third groove 401.

Luer fitting 300 is mounted on the rear of catheter 1 and may be used to connect other catheters.

The hydrophilic coating is coated outside the bendable medical device, and after the treatment by special equipment, the device has good lubricity, effectively reduces sliding friction with the inner wall of a blood vessel, and reduces the risk of damaging the blood vessel.

As can be seen from the motion state diagrams of fig. 3 and fig. 4, the rotating block 200 has a threaded structure inside, and can be matched with a toothed structure on the upper portion of the transmission block 800, and the transmission block 800 is driven by the rotating block 200 to slide backward to pull the traction wire 600 to complete the bending action of the front section of the catheter.

Fig. 5 is a state diagram of the catheter 1 before the bending operation of the front section of the catheter 1, in which the rotation block 200 does not perform the cooperative motion with the transmission block 800; fig. 6 is a state diagram of the catheter 1 after the front section of the catheter 1 performs bending motion, at this time, the rotating block 200 and the transmission block 800 complete matching motion, and according to the completion degree of the matching motion, the distal end of the catheter 1 forms different curved shapes in real time, and the different curved shapes can be respectively close to different positions of the body cavity, so as to be applied to the construction of the intravascular passageway.

The above embodiments are merely for illustrating the technical concept and features of the present utility model, and are not intended to limit the scope of the present utility model to those skilled in the art to understand the present utility model and implement the same. All equivalent changes or modifications made according to the spirit of the main technical proposal of the utility model should be covered in the protection scope of the utility model.

Claims

1. A bending-adjustable medical device, characterized in that it comprises: catheter (1) with an intermediate layer, control handle (2), wherein the control handle (2) comprises: the catheter comprises a catheter connector (100) sleeved on a catheter, a rotating block (200) connected with the catheter connector (100), a luer connector (300) sleeved on the tail of the catheter (1), a first catheter groove (400) covered on the catheter (1) and two ends of which are respectively connected with the rotating block (200) and the luer connector (300), a traction wire (600) penetrating through the first catheter groove (400) and one end of which is positioned at the middle layer of the catheter (1), a traction wire fixing block (700) provided with a first groove (701) and connected with the other end of the traction wire (600), and a transmission block (800) provided with a second groove (801) and connected with the traction wire fixing block (700), wherein the rotating block (200) is in rotary fit with the transmission block (800), and the traction wire (600) is pulled to complete bending action of the catheter (1).

2. The adjustable bend medical device according to claim 1, wherein: the traction wire (600) is a stainless steel wire with polytetrafluoroethylene coating, the diameter of the traction wire is 0.08-0.16mm, and the traction wire (600) passes through the first groove (701) and the second groove (801).

3. The adjustable bend medical device according to claim 1, wherein: the upper part of the first conduit groove (400) is provided with a third groove (401), and the traction wire fixing block (700) and the transmission block (800) are connected and buried in the third groove (401) together.

4. The adjustable bend medical device according to claim 1, further comprising: the novel plastic pipe comprises a second pipe groove (500) spliced with the first pipe groove (400), a first front shell (10) covered on the upper part of the first pipe groove (400), a first rear shell (20) covered on the upper part of the first pipe groove (400) and connected with the first front shell (10), a second front shell (30) covered on the lower part of the second pipe groove (500) and spliced with the first front shell (10), and a second rear shell (40) covered on the lower part of the second pipe groove (500) and spliced with the first rear shell (20).

5. The adjustable bend medical device according to claim 1, wherein: the inside of the rotating block (200) is provided with a thread structure, and the upper part of the transmission block is provided with a tooth-shaped structure.