CN219594765U

CN219594765U - Expandable catheter sheath and interventional component

Info

Publication number: CN219594765U
Application number: CN202320539078.5U
Authority: CN
Inventors: 王旭; 张晶; 徐东辉
Original assignee: Fuwai Hospital of CAMS and PUMC
Current assignee: Fuwai Hospital of CAMS and PUMC
Priority date: 2023-03-16
Filing date: 2023-03-16
Publication date: 2023-08-29
Anticipated expiration: 2033-03-16

Abstract

The utility model discloses an expandable catheter sheath and an interventional component, wherein the expandable catheter sheath comprises a hemostatic valve I, a connecting sleeve and a sheath tube which are sequentially connected, and the sheath tube is of a structure capable of being expanded along the radial direction; the hemostatic valve II is also included; the inner hole of the hemostatic valve I is communicated with the inner hole of the hemostatic valve II. The interventional component comprises a radiography catheter with the catheter sheath and the pigtail catheter structure. According to the utility model, only one side femoral artery of a patient needs to be punctured during TAVR operation, which is beneficial to alleviating pain of the patient, reducing the probability of puncture complications and shortening operation time.

Description

Expandable catheter sheath and interventional component

Technical Field

The utility model relates to the field of medical instruments, in particular to an expandable catheter sheath and an interventional component.

Background

The advanced and minimally invasive surgical operations of surgical patients are two major trends of cardiac surgery at present; intervention has been increasingly accepted and selected by more particularly advanced patients by penetrating blood vessels, transcatheter aortic valve replacement (transcatheter aortic valve replacement, TAVR for short) than traditional open chest, surgical aortic valve replacement with established extracorporeal circulation; in recent years, significant progress has been made in TAVR technology, and related operational procedures, operational devices and materials in TAVR surgery are continuously improved and optimized along with technological progress.

Currently, catheters for clinical use are shown in patent CN217489502U (name: catheter sheath and interventional component; publication date: 2022.09.27) or patent CN 307312133S (name: expandable catheter sheath; publication date: 2022.05.03), and generally comprise a sheath tube, a first hemostasis valve, a connecting sleeve and a second hemostasis valve, wherein the sheath tube is in an expandable structure and is provided with a first instrument channel, the first hemostasis valve is connected with the sheath tube through the connecting sleeve and is provided with a second instrument channel, and the first instrument channel is in butt joint with the second instrument channel so as to facilitate the passage of an interventional instrument.

Corresponding to the instrument structure, the TAVR operation at present conventionally needs two catheter access ways due to the sheath tube limited by the single-cavity structure, the common auxiliary access way is to puncture the left femoral artery, insert the sheath tube, send the pigtail catheter (radiography catheter) into the femoral artery through the sheath tube, pass through the abdominal aorta to the vicinity of the aortic sinus, and be used for intraoperative radiography and artificial valve release positioning; the femoral artery puncture on the right side (or thicker and better vascular condition side) is taken as a main access way, a catheter sheath is arranged, and a percutaneous access way which is beneficial to intravascular devices (such as a prosthetic valve conveyor) is established.

However, the problems of clinical application are: when the catheter sheath with the structure is used for performing TAVR operation, the femoral artery on both sides of a patient needs to be punctured, so that the pain of the patient is aggravated, the probability of puncture complications is increased, and the operation time is longer.

The above technical problems need to be solved.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide an expandable catheter sheath and an interventional component, which only need to puncture a single femoral artery of a patient during TAVR operation, thereby being beneficial to alleviating pain of the patient, reducing the occurrence probability of puncture complications and shortening operation time.

In order to achieve the above purpose, in one aspect, the present utility model provides an expandable catheter sheath, which includes a hemostatic valve i, a connecting sleeve, and a sheath tube connected in sequence, wherein the sheath tube has a structure that can be expanded in a radial direction; the hemostatic valve II is also included; the inner hole of the hemostatic valve I is communicated with the inner hole of the hemostatic valve II.

As a further improvement to the technical scheme of the utility model, the hemostatic valve II is connected and communicated with the lumen II through an extension tube, and the tail end of the extension tube penetrates into the connecting sleeve and then is connected with the lumen II.

As a further improvement to the technical scheme of the utility model, the tube wall of the sheath tube is of a rolled wall structure, and the tube wall is provided with an expanded state for expanding the rolled wall structure at the corresponding part and a preset state for automatically recovering the rolled wall structure; the coiled wall structure is arranged on the pipe wall corresponding to the pipe cavity I.

As a further development of the utility model, the beginning and end sides of the tube wall winding are connected by a flexible envelope.

As a further improvement to the technical scheme of the utility model, the lumen I and the lumen II are isolated by a flexible isolating film fixed in the inner cavity of the sheath tube.

On the other hand, the utility model also provides an interventional component, which comprises a catheter sheath and a radiography catheter with a pigtail catheter structure, wherein the catheter sheath comprises a hemostatic valve I, a connecting sleeve and a sheath tube which are sequentially connected, and the sheath tube is of a structure capable of expanding along the radial direction; the catheter is characterized in that a lumen I and a lumen II which are isolated are arranged in the sheath tube, the lumen I is communicated with an inner hole of the hemostatic valve I, the lumen II is communicated with an inner hole of the hemostatic valve II, and the radiography catheter penetrates into the lumen II from the hemostatic valve II.

Compared with the prior art, the utility model has the following beneficial technical effects:

according to the expandable catheter sheath and the intervention component, as the isolated lumen I and the isolated lumen II are arranged in the sheath tube, two instruments can be simultaneously contained to pass through during TAVR operation, namely, the lumen I can be used for passing through intravascular instruments, and the lumen II can be used for passing through a radiography catheter, so that the traditional main and auxiliary bilateral femoral artery access ways are changed into unilateral femoral artery access ways, only one femoral artery of a patient needs to be punctured, the pain of the patient is facilitated to be relieved, the occurrence probability of puncture complications is reduced, and the operation time of operation is shortened.

Additional aspects of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic illustration of the structure of an expandable catheter sheath provided by the present utility model;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic illustration of an interventional component provided by the present utility model;

fig. 4 is a sectional view of B-B in fig. 1.

Detailed Description

The technical scheme of the present utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments of the present utility model.

Example 1

As shown in fig. 1 and 2: the expandable catheter sheath provided by the embodiment comprises a hemostatic valve I1, a connecting sleeve 2 and a sheath tube 3 which are sequentially connected (i.e. are sequentially butted from left to right in fig. 1), wherein the sheath tube 3 is of a structure capable of being expanded along the radial direction; the hemostatic valve II 4 is also included; the inner side of the sheath tube 3 is provided with a lumen I5 and a lumen II 6 which are isolated, the lumen I5 is communicated with the inner hole of the hemostatic valve I1, and the lumen II 6 is communicated with the inner hole of the hemostatic valve II 4.

The structures and functions of the hemostatic valves I1 and II 4 (preventing blood leakage accidents during use and idle) are consistent with the prior art, and are not repeated here; the sheath 3 can be expanded radially, and the inner diameter of the sheath 3 can be properly expanded under the condition of the blood vessel; the lumen I5 and the lumen II 6 are arranged along the extending direction of the sheath tube 3, the size of the lumen diameter can be determined according to the requirement, and in general, the lumen diameter of the lumen I5 is larger than that of the lumen II 6, so that the device is suitable for passing instruments with different sizes.

Because the isolated lumen I5 and lumen II 6 are arranged in the sheath tube 3, two instruments can be simultaneously accommodated to pass through during TAVR operation, namely, the lumen I5 can be used for the intravascular instrument (namely, the artificial valve conveyor) to pass through, and the lumen II 6 can be used for the radiography catheter 7 to pass through, so that the traditional main and auxiliary bilateral femoral artery access is changed into a unilateral femoral artery access, only the unilateral femoral artery of a patient is required to be punctured, the pain of the patient is facilitated to be relieved, the occurrence probability of puncture complications is reduced, and the operation time of the operation is shortened.

In this embodiment, the hemostatic valve ii 4 is connected to the lumen ii 6 through the extension tube 8, and the tail end of the extension tube 8 penetrates the connecting sleeve 2 and is connected to the lumen ii 6. The connecting sleeve 2 can be of a flexible structure, so that the connecting sleeve can be properly deformed; the extension tube 8 is Y-shaped after being connected with the connecting sleeve 2, and is arranged outside the patient during operation.

In this embodiment, the wall of the sheath 3 is a rolled wall structure, and the wall has an expanded state of unrolling the rolled wall structure at the corresponding position and a pre-formed state of self-restoring the rolled wall structure; the wall rolling structure is arranged on the pipe wall corresponding to the pipe cavity I5. The wall rolling structure is that the pipe wall parts are overlapped and lapped together; in the expanded state, the pipe diameter of the sheath pipe 3 is increased, so that the conveyer with larger size is adapted; in a pre-formed state, the pipe diameter of the sheath pipe 3 is minimized, and the size of the blood vessel of a patient is adapted; the coiled wall structure is only arranged on the pipe wall corresponding to the pipe cavity I5, so that the passing of the contrast catheter 7 in the pipe cavity II 6 is not affected.

In this embodiment, the beginning and ending sides of the tube wall wrap are connected by a flexible envelope 9. The flexible envelope 9 is used to keep the sheath 3 closed, to bind the endovascular device against exposure, and to prevent blood or body fluids from escaping the vessel wall. For the rolled wall structure and the flexible envelope 9, refer to CN217489502U, which is not described herein.

In this embodiment, the lumen I5 is isolated from the lumen II 6 by a flexible isolation membrane 10 secured to the lumen of the sheath 3. The flexible isolation membrane 10 can be made of PTFE materials, the flexible structure of the flexible isolation membrane can adapt to implantation instruments with different sizes in the lumen I5 and the lumen II 6 to a certain extent, and the universality of the sheath tube 3 is improved.

Example two

As shown in fig. 3 and 4: the interventional component comprises a catheter sheath and a radiography catheter 7 of a pig tail catheter structure, wherein the catheter sheath comprises a hemostatic valve I1, a connecting sleeve 2 and a sheath tube 3 which are sequentially connected, and the sheath tube 3 is of a structure capable of expanding along the radial direction; the catheter is characterized in that a lumen I5 and a lumen II 6 which are isolated from each other are arranged in the sheath tube 3, the lumen I5 is communicated with an inner hole of the hemostatic valve I1, the lumen II 6 is communicated with an inner hole of the hemostatic valve II 4, and the contrast catheter 7 penetrates into the lumen II 6 from the hemostatic valve II 4.

A contrast catheter 7 of a pigtail catheter structure, the tail end of which is a curled structure (curled under the action of a guide wire after reaching a preset position), and a plurality of through holes are arranged at least at the curled part; the lumen ii 6 is adapted with a contrast catheter 7.

Because the isolated lumen I5 and lumen II 6 are arranged in the sheath tube 3, two instruments can be simultaneously accommodated to pass through during TAVR operation, namely, the lumen I5 can be used for passing through intravascular instruments, and the lumen II 6 can be used for passing through the radiography catheter 7, so that the traditional main and auxiliary bilateral femoral artery access ways are changed into unilateral femoral artery access ways, only the unilateral femoral artery of a patient is required to be punctured, the pain of the patient is reduced, the probability of puncture complications is reduced, and the operation time of the operation is shortened.

The foregoing is merely exemplary embodiments of the present utility model, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. An expandable catheter sheath comprises a hemostatic valve I, a connecting sleeve and a sheath tube which are connected in sequence, wherein the sheath tube is of a structure capable of being expanded along the radial direction; the method is characterized in that: the hemostatic valve II is also included; the inner hole of the hemostatic valve I is communicated with the inner hole of the hemostatic valve II.

2. An expandable catheter sheath according to claim 1, wherein: the hemostatic valve II is connected and communicated with the lumen II through an extension tube, and the tail end of the extension tube penetrates into the connecting sleeve and then is connected with the lumen II.

3. An expandable catheter sheath according to claim 1, wherein: the wall of the sheath tube is of a rolled wall structure, and the wall is provided with an expanded state for expanding the rolled wall structure at the corresponding part and a pre-formed state for automatically recovering the rolled wall structure; the coiled wall structure is arranged on the pipe wall corresponding to the pipe cavity I.

4. An expandable catheter sheath according to claim 3, wherein: the beginning and ending sides of the tube wall wrap are connected by a flexible envelope.

5. An expandable catheter sheath according to claim 3, wherein: the lumen I and the lumen II are isolated by a flexible isolating membrane fixed in the inner cavity of the sheath.

6. An interventional assembly, characterized in that: the catheter comprises a catheter sheath and a pig tail catheter structure, wherein the catheter sheath comprises a hemostatic valve I, a connecting sleeve and a sheath tube which are sequentially connected, and the sheath tube is of a structure capable of expanding along the radial direction; the catheter is characterized in that a lumen I and a lumen II which are isolated are arranged in the sheath tube, the lumen I is communicated with an inner hole of the hemostatic valve I, the lumen II is communicated with an inner hole of the hemostatic valve II, and the radiography catheter penetrates into the lumen II from the hemostatic valve II.

7. An interventional component according to claim 6, wherein: the hemostatic valve II is connected and communicated with the lumen II through an extension tube, and the tail end of the extension tube penetrates into the connecting sleeve and then is connected with the lumen II.

8. An interventional component according to claim 6, wherein: the wall of the sheath tube is of a rolled wall structure, and the wall is provided with an expanded state for expanding the rolled wall structure at the corresponding part and a pre-formed state for automatically recovering the rolled wall structure; the coiled wall structure is arranged on the pipe wall corresponding to the pipe cavity I.

9. An interventional component according to claim 8, wherein: the beginning and ending sides of the tube wall wrap are connected by a flexible envelope.

10. An interventional component according to claim 8, wherein: the lumen I and the lumen II are isolated by a flexible isolating membrane fixed in the inner cavity of the sheath.