CN215741227U

CN215741227U - Catheter sheath and catheter sheath group with same

Info

Publication number: CN215741227U
Application number: CN202122199431.3U
Authority: CN
Inventors: 张帅; 顾玲玉; 康小然; 武效金; 张小武
Original assignee: Sano Shenchang Medical Technology Co ltd
Current assignee: Sano Shenchang Medical Technology Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-02-08
Anticipated expiration: 2031-09-10

Abstract

The utility model relates to the technical field of interventional medical instruments, in particular to a catheter sheath and a catheter sheath group with the same. A catheter sheath, comprising: a tube body; the first cavity is arranged on the inner side of the pipe body and penetrates through the pipe body along the extending direction of the pipe body; the second cavity is arranged on the inner side of the pipe body, the second cavity and the first cavity extend in parallel and are isolated from each other, the second cavity and the first cavity are arranged in parallel and level with each other towards one end of the tail portion of the pipe body, the length of the second cavity is smaller than that of the first cavity, and the outlet of the second cavity is arranged on the side wall of the pipe body. The catheter sheath extends into a human body, and the outlet of the second cavity is arranged on the side wall of the tube body, so that the outlet of the second cavity can smoothly advance along with the side wall of the tube body in the movement process, force cannot be generated between the outlet of the second cavity and the inner wall of the blood vessel, the inner wall of the blood vessel cannot be damaged, and the risk of blood vessel interlayer generation when the catheter advances in the blood vessel can be greatly reduced.

Description

Catheter sheath and catheter sheath group with same

Technical Field

The utility model relates to the technical field of interventional medical instruments, in particular to a catheter sheath and a catheter sheath group with the same.

Background

At present, in the field of examination and treatment of cardiovascular and cerebrovascular diseases, minimally invasive interventional surgery is increasingly applied to clinic due to the advantages of less bleeding, less trauma, less complications, safety, reliability, quick postoperative recovery and the like. The catheter sheath instrument is used as an auxiliary guide instrument for a cardiovascular and cerebrovascular minimally invasive interventional operation and plays an important role in the interventional operation. The single-cavity catheter sheath is unchanged in the using process, and particularly needs to be additionally subjected to invasive arterial blood pressure monitoring when arterial blood pressure monitoring is carried out in an interventional operation, so that related complications such as bleeding and thrombus are easily caused. Therefore, the whole tube body of the existing double-cavity catheter sheath is arranged into a double-cavity catheter, and arterial blood pressure monitoring is carried out by utilizing an extra cavity so as to realize minimally invasive detection. However, because the pressure monitoring port of the arterial blood vessel is arranged at the head end of the sheath, and in order to facilitate the advancement of the catheter sheath, the head of the catheter sheath is generally conical, when the catheter sheath advances, a cavity on one side for the double-cavity catheter advances along a guide wire, and the other cavity for the arterial indwelling needle is not supported by the guide wire, and an acute angle is formed between the head of the cavity and the inner wall of the blood vessel, so that the inner wall of the blood vessel is easily scratched when the catheter sheath advances, a blood vessel interlayer is formed, blood enters the middle layer of the arterial wall, hematoma in the interlayer is formed, and severe pain can be caused to a patient, and the pain can affect multiple organs such as the heart, the kidney and the like.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defect that a vascular interlayer is easy to form when a double-cavity catheter sheath is used for cardiovascular and cerebrovascular operations in the prior art, so that the catheter sheath and the catheter sheath group with the same are provided.

In order to solve the above technical problem, the present invention provides a catheter sheath comprising:

a tube body;

the first cavity is arranged on the inner side of the pipe body and penetrates through the pipe body along the extending direction of the pipe body;

the second cavity is arranged on the inner side of the pipe body, the second cavity and the first cavity extend in parallel and are isolated from each other, the second cavity and the first cavity are arranged in parallel and level with each other towards one end of the tail portion of the pipe body, the length of the second cavity is smaller than that of the first cavity, and the outlet of the second cavity is arranged on the side wall of the pipe body.

Optionally, the length of the second cavity is no greater than two-thirds of the length of the first cavity.

Optionally, the opening of the second cavity faces perpendicular to the extending direction of the second cavity.

Optionally, the outer diameter of the region where the first cavity and the second cavity extend in parallel is smaller than the outer diameter of the rest region of the first cavity.

Optionally, the outer side wall of the tube body head is tapered pointed.

Optionally, a sheath seat is mounted at the tail of the tube body, a first connecting tube and a second connecting tube are connected to the sheath seat, the first connecting tube is communicated with the first cavity, and the second connecting tube is communicated with the second cavity.

Optionally, a hemostatic valve is further installed at an end of the sheath seat away from the tube body.

Optionally, the hemostatic valve is an elastic rubber member, and a penetrating slit is provided on the hemostatic valve, and the penetrating slit has an open state in which the inner cavity of the sheath tube seat is communicated with the outside under the action of an external force, and a closed state when the hemostatic valve is not subjected to the external force.

Optionally, a communication valve is mounted at one end of the first connecting pipe and/or the second connecting pipe far away from the sheath pipe seat.

The utility model also provides a catheter sheath group which is provided with the catheter sheath.

The technical scheme of the utility model has the following advantages:

1. the utility model provides a catheter sheath, comprising: a tube body; the first cavity is arranged on the inner side of the pipe body and penetrates through the pipe body along the extending direction of the pipe body; the second cavity is arranged on the inner side of the pipe body, the second cavity and the first cavity extend in parallel and are isolated from each other, the second cavity and the first cavity are arranged in parallel and level with each other towards one end of the tail portion of the pipe body, the length of the second cavity is smaller than that of the first cavity, and the outlet of the second cavity is arranged on the side wall of the pipe body.

When a cardiovascular and cerebrovascular minimally invasive interventional operation is carried out, a catheter sheath firstly extends into a human body, the catheter sheath is guided through a guide wire when extending, the guide wire extends into a first cavity, in the advancing process of the catheter sheath, the outlet end of the head of the first cavity is completely supported by the guide wire, the outlet of the first cavity cannot damage the inner wall of a blood vessel, the outlet of a second cavity is arranged on the side wall of a tube body, so that the outlet of the second cavity can smoothly advance along with the side wall of the tube body in the moving process, force cannot be generated between the outlet of the second cavity and the inner wall of the blood vessel, the inner wall of the blood vessel cannot be damaged, and the risk of blood vessel interlayer generation when the catheter advances in the blood vessel can be greatly reduced.

2. According to the catheter sheath provided by the utility model, the opening direction of the second cavity is vertical to the extending direction of the second cavity. The opening of the second cavity is flush with the outer side wall of the tube body, and the blood vessel interlayer caused by scratches on the inner wall of the blood vessel due to the inclination between the opening of the second cavity and the inner wall of the blood vessel is avoided when the tube body moves forwards in the blood vessel.

3. According to the catheter sheath provided by the utility model, the sheath tube seat is arranged at the tail part of the tube body, the sheath tube seat is connected with the first connecting tube and the second connecting tube, the first connecting tube is communicated with the first cavity, and the second connecting tube is communicated with the second cavity. The first cavity and the second cavity are connected with the outside through the sheath tube seat, and the backflow of blood from the first cavity or the second cavity is avoided.

4. According to the catheter sheath provided by the utility model, the hemostatic valve is an elastic rubber piece, the hemostatic valve is provided with the penetrating seam, and the penetrating seam has an opening state for communicating the inner cavity of the sheath catheter seat with the outside under the action of external force and a closing state when the external force is not applied. Instruments such as the dilator and the guide wire can penetrate through the penetrating seam and enter the first cavity of the catheter sheath to guide the tube body to support or advance, and the hemostatic valve can be tightly attached to the instruments after the instruments penetrate through the penetrating seam, so that blood return can be effectively prevented.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of a catheter sheath provided in an embodiment of the present invention.

Description of reference numerals: 1. a tube body; 2. a first cavity; 3. a second cavity; 4. a sheath seat; 5. a first connecting pipe; 6. a second connecting pipe; 7. a hemostatic valve; 8. a communication valve.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

Fig. 1 shows a catheter sheath according to the present embodiment, which includes: the tube comprises a tube body 1, a first cavity 2 and a second cavity 3 which are arranged in the tube body 1.

The first cavity 2 is arranged on the inner side of the pipe body 1, and the first cavity 2 penetrates through the pipe body 1 along the extending direction of the pipe body 1. The second cavity 3 is arranged on the inner side of the pipe body 1, the second cavity 3 and the first cavity 2 extend in parallel and are isolated from each other, the second cavity 3 and the first cavity 2 are arranged in parallel and level towards one end of the tail of the pipe body 1, the length of the second cavity 3 is smaller than that of the first cavity 2, and the outlet of the second cavity 3 is arranged on the side wall of the pipe body 1. The length of the second cavity 3 is no more than two thirds of the length of the first cavity 2. In this embodiment, the length of the second cavity 3 is two thirds of the length of the first cavity 2, that is, the distance from the opening of the second cavity 3 to the head of the first cavity 2 is one third of the total length of the first cavity 2. The opening of the second cavity 3 is oriented perpendicular to the direction of extension of the second cavity 3.

The outer diameter of the parallel extending area of the first cavity 2 and the second cavity 3 is smaller than that of the first cavity 2 in the other areas. Specifically, the sum of the outer diameters of the parallel extending areas of the first cavity 2 and the second cavity 3 is equal to the outer diameter of the first cavity 2 in the other areas, so that the outer diameter of the whole pipe body 1 is the same, and the outer wall of the pipe body 1 is a smooth surface with an opening of the second cavity 3.

In order to facilitate the advance of the tube body 1 in the blood vessel, the outer side wall of the head of the tube body 1 is a tapered tip. A sheath tube seat 4 is installed at the tail of the tube body 1, a first connecting tube 5 and a second connecting tube 6 are connected to the sheath tube seat 4, the first connecting tube 5 is communicated with the first cavity 2, and the second connecting tube 6 is communicated with the second cavity 3. The end of the sheath tube seat 4 far away from the tube body 1 is also provided with a hemostatic valve 7. The hemostatic valve 7 is an elastic rubber piece, a penetrating seam is arranged on the hemostatic valve 7, and the penetrating seam has an opening state which enables the inner cavity of the sheath tube seat 4 to be communicated with the outside under the action of external force and a closed state when the external force is not applied. Three-way valves serving as communication valves 8 are mounted at the ends, far away from the sheath tube seat 4, of the first connecting tube 5 and the second connecting tube 6. And the other two openings of the three-way valve communicated with the first connecting pipe 5 are used for extending surgical instruments, and the other opening is used for cleaning the inner cavity of the first cavity 2. And the other two openings of the three-way valve communicated with the second connecting pipe 6 are used for extending an arterial retention needle to detect the pressure in the arterial blood vessel, and the other opening is used for cleaning the inner cavity of the second cavity 3.

When in minimally invasive interventional operation of cardiovascular and cerebrovascular, firstly, the catheter sheath is stretched into a human body, and is guided by the guide wire when being stretched, the tube body 1 is arranged into a partial double-cavity structure, in the advancing process of the catheter sheath, the outlet end of the head of the first cavity 2 is completely supported by the guide wire or the dilator, the outlet of the first cavity 2 can not cause damage to the inner wall of the blood vessel, because the outlet of the second cavity 3 is arranged on the side wall of the tube body 1, and the outlet of the second cavity 3 is vertical to the extending direction of the second cavity 3, make the lateral wall of pipe body 1 be smooth curved surface for the export of second cavity 3 can advance smoothly along with the lateral wall of pipe body 1 in the motion process, can not produce power between the export of second cavity 3 and the vascular inner wall, can not cause the damage to the vascular inner wall, can greatly reduce the risk that produces the blood vessel intermediate layer when the pipe advances in the blood vessel.

Example 2

The present embodiment provides a catheter sheath set having the catheter sheath described in embodiment 1, further comprising: dilator, pjncture needle and seal wire. The catheter sheath and the dilator are made of medical polyurethane material, and the guide wire and the puncture needle are made of medical stainless steel. The catheter sheath of the catheter sheath group is set into a tubular structure with partial double cavities, when the catheter sheath group stretches into a human body, the puncture is firstly utilized for puncturing the blood vessel wall, then the guide wire is stretched into the blood vessel, the guide wire is stretched into the first cavity of the catheter sheath, and the catheter sheath advances along the guide wire in the blood vessel. In order to avoid the shaking of the catheter sheath in the advancing process, the dilator is arranged in the first cavity, and the first cavity is supported and then advanced in the blood vessel along the guide wire.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. A catheter sheath, comprising:

a tube body (1);

the first cavity (2) is arranged on the inner side of the pipe body (1), and the first cavity (2) penetrates through the pipe body (1) along the extending direction of the pipe body (1);

the second cavity (3) is arranged on the inner side of the pipe body (1), the second cavity (3) and the first cavity (2) are extended in parallel and isolated from each other, the second cavity (3) and the first cavity (2) face towards one end of the tail of the pipe body (1) and are parallel and level to each other, the length of the second cavity (3) is smaller than that of the first cavity (2), and the outlet of the second cavity (3) is arranged on the side wall of the pipe body (1).

2. The catheter sheath according to claim 1, characterized in that the length of the second lumen (3) is not more than two thirds of the length of the first lumen (2).

3. The introducer sheath according to claim 1, characterized in that the opening of the second lumen (3) is oriented perpendicularly to the extension of the second lumen (3).

4. The sheath according to any of the claims from 1 to 3, characterised in that the external diameter of the area where the first cavity (2) extends alongside the second cavity (3) is smaller than the external diameter of the remaining area of the first cavity (2).

5. A catheter sheath according to any one of claims 1 to 3, characterized in that the outer side wall of the tube body (1) head is a conical tip.

6. The catheter sheath according to any one of claims 1 to 3, characterized in that a sheath seat (4) is installed at the tail part of the tube body (1), a first connecting tube (5) and a second connecting tube (6) are connected to the sheath seat (4), the first connecting tube (5) is communicated with the first cavity (2), and the second connecting tube (6) is communicated with the second cavity (3).

7. The catheter sheath according to claim 6, characterized in that the end of the sheath hub (4) remote from the tube body (1) is further fitted with a haemostatic valve (7).

8. The catheter sheath according to claim 7, characterized in that the hemostatic valve (7) is an elastic rubber member, and a penetrating slit is arranged on the hemostatic valve (7), and the penetrating slit has an open state for communicating the inner cavity of the sheath holder (4) with the outside under the action of external force and a closed state when no external force is applied.

9. The catheter sheath according to claim 6, characterized in that the end of the first connecting tube (5) and/or the second connecting tube (6) remote from the sheath hub (4) is fitted with a communication valve (8).

10. A catheter sheath set having a catheter sheath according to any one of claims 1 to 9.