WO2023015653A1

WO2023015653A1 - Introducer sheath sealing device

Info

Publication number: WO2023015653A1
Application number: PCT/CN2021/117587
Authority: WO
Inventors: 夏顺; 黄定国
Original assignee: 上海腾复医疗科技有限公司
Priority date: 2021-08-10
Filing date: 2021-09-10
Publication date: 2023-02-16

Abstract

An introducer sheath sealing device. The introducer sheath sealing device comprises an introducer sheath body (1), a connector housing (2), a sealing assembly (3), and an adjustment knob (4); the sealing assembly (3) comprises a tubular sealing valve (30) that can be elastically twisted; the inner ends of the introducer sheath body (1) and the sealing valve (30) are fixedly provided in the connector housing (2); the introducer sheath body (1) is communicated with the sealing valve (30); the adjustment knob (4) is disposed on the connector housing (2), connected to the outer end of the sealing valve (30), and used for driving the outer end of the sealing valve (30) to rotate to adjust the sealing force of the sealing valve (30); the adjustment knob (4) has an instrument introduction channel communicated with the sealing valve (30). The introducer sheath sealing device enables an introducer sheath to have both a sealing property and low introduction resistance, thereby improving the convenience and efficiency in surgical operations.

Description

A conduit sealing device

cross reference

This application refers to the Chinese patent application No. 202110915943.7 entitled "A Conduit Sealing Device" filed on August 10, 2021, which is incorporated by reference in its entirety into this application

technical field

The present application relates to the technical field of medical devices, in particular to a catheter sealing device.

Background technique

Minimally invasive endovascular interventional surgery has gradually become the mainstream trend in the treatment of vascular diseases. In general, all interventional procedures require the introduction of surgical instruments through an introduction sheath. Clinical application requires that the introduction sheath must have both tightness and low introduction resistance. Sealing requires that the introduction sheath can be well sealed to prevent blood from flowing out when used alone or in combination with other instruments. Low introduction resistance requires that the introduction sheath has very little resistance when providing an introduction channel for other instruments, so as to avoid inability to introduce or damage the instrument during introduction.

However, it is often impossible to have both sealing performance and low introduction resistance performance. That is to say, if good sealing performance is required, the introduction resistance will be greater; if the introduction resistance is small, the sealing performance will decrease.

Contents of the invention

The purpose of some embodiments of the present application is to provide a catheter sealing device, which solves the problem that the existing catheter sealing device cannot achieve both sealing performance and low introduction resistance.

An embodiment of the present application provides a catheter sealing device, including: a catheter body; a connector housing, in a tubular structure; a sealing assembly, the sealing assembly includes: an elastically twistable tubular sealing valve body, the catheter body and the inner end of the sealing valve body are all fixed in the connector housing, the conduit body communicates with the sealing valve body; and the adjustment knob is arranged on the connector housing and connected to the The outer end of the sealing valve body is connected to drive the outer end of the sealing valve body to rotate to adjust the sealing force of the sealing valve body; the adjusting knob has an instrument introduction channel communicated with the sealing valve body.

In addition, the adjusting knob is threadedly connected with the outer end of the connector housing, and the sealing force of the sealing valve body can be adjusted by the number of rotations and the screw pitch.

In addition, the inner end of the adjustment knob is provided with an internal thread, the outer end of the connector housing is provided with an external thread, and the adjustment knob and the connector housing are threaded through the internal thread and the external thread. connect.

In addition, the sealing assembly also includes internal fixing parts arranged at both ends of the sealing valve body, and the sealing valve body is fixed on the inner wall of the connector housing through the internal fixing parts at the internal ends of the sealing valve body. The valve body is fixedly connected with the adjusting knob through the inner fixing part at the outer end.

In addition, the sealing valve body is dumbbell-shaped or straight-pipe-shaped.

In addition, the sealing valve body includes an elastic valve body body and a superslip film layer arranged on the inner wall of the elastic valve body body.

In addition, the super-slip film layer is made of polytetrafluoroethylene or expanded polytetrafluoroethylene.

In addition, the sealing valve body is a straight tube balloon filled with liquid or gas.

In addition, the elasticity of the two ends of the straight tubular balloon is greater than that of the middle part of the balloon.

In addition, the catheter sealing device further includes a transfusion tube connected to the side wall of the connector body, and the transfusion tube communicates with the catheter tube body.

It can be seen from the above technical solutions that the embodiments of the present application have at least the following advantages and beneficial effects:

In the catheter sealing device of the embodiment of the present application, the sealing assembly is used as a sealing structure extending from the adjustment knob at the outer end to the introduction channel at the distal end of the catheter body. The sealing valve body is an elastic and twistable tubular structure, and the inner end of the sealing valve body is sealed. It is fixed in the connector housing and communicated with the conduit body. The outer end of the sealing valve body is connected with the adjustment knob. The outer end of the sealing valve body can be driven to rotate by operating the adjustment knob, thereby driving the sealing valve body to twist. By controlling the sealing The degree of torsion of the valve body adjusts the size of its sealing force. When it is necessary to seal the introduction channel, it can provide a large sealing force, and when it is necessary to introduce the device, it can make it have a small introduction resistance, which is convenient for the rapid introduction of the device. . Therefore, the catheter sealing device of the embodiment of the present application can simultaneously take into account the sealing performance and low-resistance introduction performance, greatly improving the convenience of operation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. It can be understood that the accompanying drawings in the following description It is only an embodiment of the present application, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic structural view of a catheter sealing device provided in an embodiment of the present application;

Fig. 2 is a schematic cross-sectional structural view of the conduction state of the catheter sealing device provided by the embodiment of the present application;

3 is a schematic cross-sectional structural view of the sealing state of the catheter sealing device provided by the embodiment of the present application;

Fig. 4 is a structural schematic diagram of a sealing component of the catheter sealing device provided in the embodiment of the present application;

Fig. 5 is a structural schematic diagram of another sealing assembly of the catheter sealing device provided in the embodiment of the present application;

Fig. 6 is a structural schematic diagram of another sealing component of the catheter sealing device provided in the embodiment of the present application;

FIG. 7 is a structural schematic diagram of the sealing state of the sealing assembly of the conduit sealing device shown in FIG. 6 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, various implementations of the present application will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present application, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in this application can also be realized.

Unless otherwise specified, the proximal end and the distal end mentioned in this application have the same meaning in terms of orientation, that is, in the state of use, the distal end is the end away from the operator, the proximal end is the end close to the operator, and the operator is at the proximal end. Control conduit seal. It should be understood that the orientation or positional relationship indicated by the terms "inner", "outer", "middle", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the application.

Please refer to FIG. 1 to FIG. 5 , a catheter sealing device provided by Embodiment 1 of the present application can be used for endovascular interventional surgery. The catheter sealing device of the embodiment of the present application mainly includes: a catheter tube body 1 , a connector housing 2 , a sealing assembly 3 , an adjustment knob 4 and an infusion tube 5 .

The connector housing 2 has a tubular structure and is used for the sealed connection of the catheter body 1 , the infusion tube 5 and the sealing assembly 3 . The infusion tube 5 is connected to the side wall of the connector housing 2 . The transfusion tube 5 communicates with the catheter body 1, and thrombus suction and the like can be carried out by the transfusion tube 5. In some examples, the catheter sealing device may not include an infusion tube. In this case, the connector housing 2 is mainly used for the sealed connection between the catheter body 1 and the sealing assembly 3 . The sealing assembly 3 is disposed in the connector housing 2 . The sealing assembly 3 includes: an elastically twistable tubular sealing valve body 30 , the inner ends of the conduit body 1 and the sealing valve body 30 are fixed in the connector housing 2 , and the conduit body 1 communicates with the sealing valve body 30 .

The adjustment knob 4 is arranged on the connector housing 2 and connected with the outer end of the sealing valve body 30 , for driving the outer end of the sealing valve body 30 to rotate to adjust the sealing force of the sealing valve body 30 . The adjustment knob 4 has an instrument introduction channel communicated with the sealing valve body 30 . An axial instrument introduction channel is formed in the catheter sealing device from the outer end of the adjustment knob 4 to the distal end of the catheter tube body 1 .

The sealing assembly 3 may further include: internal fixing parts arranged at both ends of the sealing valve body 30 . The sealing valve body 30 is fixed on the inner wall of the connector housing 2 through the inner fixing part 31 at the inner end, and is fixedly connected with the adjusting knob 4 through the inner fixing part 32 at the outer end. Both the inner fixing part 31 sealing the inner end of the valve body 30 and the inner fixing part 32 sealing the outer end of the valve body 30 are annular support parts. The sealing valve body 30 is supported and fixed on the inner wall of the connector housing 2 by an inner fixing member 31 at its inner end. The outer end of the adjusting knob 4 forms a fixing ring 40 extending axially inward, and the sealing valve body 30 is supported and fixed in the fixing ring 40 of the adjusting knob 4 through the inner fixing member 32 at the outer end. By arranging internal fixing parts at both ends of the sealing valve body 30 , deformation of both ends of the sealing valve body 30 can be prevented, and the sealing valve body 30 can be easily fixed on the connector housing 2 and the adjusting knob 4 .

In some examples, the two ends of the sealing valve body 30 may not be provided with internal fixing parts, but the inner ends of the sealing valve body 30 are directly sleeved on the fixing ring formed in the connector housing 2, and the sealing valve body 30 The outer end is sheathed on the annular fixing structure of the adjusting knob 4 .

The adjusting knob 4 can be a cylindrical structure, and the adjusting knob 4 is threadedly connected with the outer end of the connector housing 2, and the sealing force of the sealing valve body 30 can be adjusted by the number of rotations and the screw pitch. As shown in Figures 2 and 3, the inner end of the adjustment knob 4 is provided with an internal thread, and the outer end of the connector housing 2 is provided with an external thread, and the adjustment knob 4 and the connector housing 2 are threaded through the internal thread and the external thread. In some examples, the inner end of the adjustment knob 4 is provided with an external thread, the outer end of the connector housing 2 is provided with an internal thread, and the adjustment knob 4 and the connector housing 2 are screwed together through the external thread and the internal thread. The threaded connection method is not only convenient for the adjustment knob 4 to drive the sealing assembly 3 to rotate, but also can play a role of rotation locking, which is convenient for locking the sealing assembly 3 at any position. It can be understood that the adjustment knob 4 can also adopt other structures that are conveniently disposed on the connector housing 2 and can drive the sealing assembly 3 to rotate and lock, and no specific limitation is set here.

The sealing assembly 3 is the main part for opening and sealing the introduction passage, and its sealing valve body 30 is twisted and deformed under the driving of the adjustment knob 4, thereby reducing the passage in the sealing valve body 30 until it is completely closed. For example, when the sealing valve body 30 is twisted more than two times, good sealing performance can be provided. When the sealing valve body 30 is not twisted, it can be in an open state as shown in FIG. Injury introduced instrument. Moreover, the narrowing degree of the introduction channel and the closing force after closing can be quantitatively controlled by adjusting the pitch and the rotation angle of the knob 4, so that the sealing performance is precisely and controllable.

In order to make the sealing valve body 30 have better sealing performance, the sealing valve body 30 may include an elastic valve body body 300 and a super-slip film layer 301 disposed on the inner wall of the elastic valve body body 300 . The elastic valve body 300 is made of elastic material, which needs to have certain support and twistability. The structure of the super-sliding film layer 301 can be made of polytetrafluoroethylene (PTFE) or expanded polytetrafluoroethylene (e-PTFE).

As shown in FIG. 4 , the sealing valve body 30 may be in the shape of a dumbbell. The elasticity of the dumbbell-shaped sealing valve body 30 gradually increases from the middle to both ends. Therefore, when the sealing valve body 30 is subjected to torsion force, the central part is more likely to be torsionally deformed, making the sealing performance better and easier to control.

As shown in FIG. 5 , the sealing valve body 30 may also be in the shape of a straight pipe. The straight pipe-shaped sealing valve body 30 can provide a larger introduction diameter in a natural state.

As an alternative to the sealing valve body in the above embodiment, as shown in FIG. 6 , the sealing valve body 30 can also be a straight tubular balloon filled with liquid or gas. The straight tubular balloon has a sealed structure, and a certain amount of liquid or gas is sealed inside. The balloon structure sealing the valve body 30 can be made of elastic body and has good compliance. As shown in Figure 7, when the adjustment knob 4 is rotated, the liquid or gas in the straight tube-shaped balloon-shaped sealing valve body 30 is squeezed to the middle by both ends, and the balloon is inflated in the middle, and finally reaches a tightness. combined state. In some examples, the elasticity of the two ends of the straight tubular balloon is greater than the elasticity of the middle portion of the balloon. For example, when making the balloon sealing valve body 30, the length of its two ends can be made into a solid valve body, and the thickness of the solid valve body can also be made smaller, so that when the sealing valve body 30 is subjected to torsional force, Liquid or gas is squeezed towards the middle part.

In the interventional operation, the catheter sealing device according to the embodiment of the present application is inserted into the blood vessel according to the standard operation, and the adjustment knob is rotated to make the sealing valve body 30 to a tight state, which can play a role in hemostasis. Take the device to be introduced, loosen the adjustment knob 4 according to the size of the device, open the introduction channel to the required size, and quickly insert the device to be introduced, then observe the bleeding situation and rotate the adjustment knob until the bleeding is just stopped.

It can be seen from the above technical solutions that the embodiments of the present application have the following advantages and beneficial effects:

The catheter sealing device of the embodiment of the present application has adjustable inner diameter and adjustable sealing force. When used to introduce other interventional surgical instruments, the sealing force can be adjusted according to the demand, and can reduce the introduction and return as much as possible under the premise of achieving the hemostasis effect. Withdraw resistance. During the operation, the operation time can be saved, and the device can be prevented from being damaged by large resistance. Therefore, the catheter sealing device of the embodiment of the present application can simultaneously take into account the sealing performance and low-resistance introduction performance, greatly improving the convenience of operation.

Those of ordinary skill in the art can understand that the above-mentioned implementation modes are specific examples for realizing the present application, and in practical applications, various changes can be made to it in form and details without departing from the spirit and spirit of the present application. scope.

Claims

A conduit sealing device, characterized in that it comprises:

Catheter body;

The connector housing has a tubular structure;

A sealing assembly, the sealing assembly includes: an elastically twistable tubular sealing valve body, the conduit body and the inner end of the sealing valve body are fixed in the connector housing, the conduit body and the seal valve body communication as described above; and

The adjustment knob is arranged on the connector housing and is connected with the outer end of the sealing valve body, and is used to drive the outer end of the sealing valve body to rotate to adjust the sealing force of the sealing valve body; the adjustment The knob has an instrument introduction channel communicated with the sealing valve body.
The device according to claim 1, wherein the adjusting knob is threadedly connected to the outer end of the connector housing, and the sealing force of the sealing valve body can be adjusted by the number of rotations and the screw pitch.
The device according to claim 2, wherein the inner end of the adjustment knob is provided with internal threads, the outer end of the connector housing is provided with external threads, and the adjustment knob and the connector housing pass through the The internal thread and the external thread are threaded.
The device according to claim 1, wherein the sealing assembly further includes internal fixings arranged at both ends of the sealing valve body, and the sealing valve body is fixed on the The inner wall of the connector housing, the sealing valve body is fixedly connected with the adjusting knob through the inner fixing member at the outer end.
The device according to claim 1, wherein the sealing valve body is dumbbell-shaped or straight-pipe-shaped.
The device according to claim 1, wherein the sealing valve body comprises an elastic valve body body and a super-slip film layer arranged on the inner wall of the elastic valve body body.
The device according to claim 6, wherein the super-slip film layer is made of polytetrafluoroethylene or expanded polytetrafluoroethylene.
The device according to claim 1, wherein the sealing valve body is a straight tubular balloon filled with liquid or gas.
The device according to claim 8, wherein the elasticity of the two ends of the straight tubular balloon is greater than the elasticity of the middle part of the balloon.
The device according to claim 1, wherein the catheter sealing device further comprises a fluid delivery tube connected to the side wall of the connector body, and the fluid delivery tube communicates with the catheter body.