CN115501446A

CN115501446A - Tearable sheath

Info

Publication number: CN115501446A
Application number: CN202211060561.1A
Authority: CN
Inventors: 冯启涛; 刘欢; 陈凯; 李帅康; 巩郑
Original assignee: Anhui Tongling Bionic Technology Co Ltd
Current assignee: Anhui Tongling Bionic Technology Co Ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-12-23

Abstract

The invention relates to the technical field of medical instruments, in particular to a tearable sheath tube, which comprises a tearable tubular shell and a tearable guide sheath arranged at the end part of the tubular shell, wherein a hemostasis part is arranged in the tubular shell, the hemostasis part is constructed into a closed structure which radially inwards extends from the inner wall of the tubular shell and extends to the side of the guide sheath, and the closed structure of the hemostasis part is tightly attached to the outer surface of the medical instrument after the medical instrument is inserted into the tubular shell; the tearable sheath provided by the invention has excellent reliability, can effectively reduce the risk of blood loss, and can prevent blood from flowing out through the sheath.

Description

Tearable sheath

Technical Field

The invention relates to the technical field of medical instruments, in particular to a tearable sheath tube.

Background

In minimally invasive interventional techniques, medical devices are required to reach a target site through a percutaneous puncture approach. The sheath tube constructs a channel for communicating the blood vessel with the external environment, so that the instrument can conveniently enter or exit the blood vessel, and the blood extravasation at the puncture point is avoided or reduced. When a special medical device is encountered, such as a miniature percutaneous interventional catheter pump, because the pump body is different from the outer diameter of the catheter, the device cannot be directly pulled out from the sheath, and the sheath is required to be torn from the outside and torn while being withdrawn until the sheath is completely separated, so that the sheath is called a tearable sheath.

In chinese patent publication No. CN 106794338A, a system for providing vascular access in a patient is disclosed in which a hemostatic valve that allows introduction of a medical device without risk of blood loss includes a slit membrane, an introducer sheath, and a housing; the slit membrane is typically a flexible rubber disc comprising a membrane slit and a central hole, which membrane slit is pressed against the surface of the device when the device is introduced, to prevent the outflow of blood. While the hemostatic effect of such a disk-shaped slit film is relatively great in relation to the effect of its attachment to the surface of the device during use, for this reason, in the preferred embodiment of the above-mentioned patent document, a plurality of hemostatic valves, such as a proximal hemostatic valve and a distal hemostatic valve, are usually provided; and a proximal hemostasis valve, a distal hemostasis valve, and an intermediate hemostasis valve. That is, in the prior art, in order to ensure that there is no risk of blood loss, a plurality of hemostatic valves arranged at intervals need to be provided, which necessarily results in a complicated structure of the vascular access.

Disclosure of Invention

The embodiment of the invention aims to provide a tearable sheath, which is simple in structure on the premise of ensuring no risk of blood loss.

In order to achieve the purpose, the invention adopts the following technical scheme:

a tearable sheath tube comprises a tearable tubular shell and a tearable guiding sheath arranged at the end of the tubular shell, wherein a hemostatic part is arranged in the tubular shell, the hemostatic part is configured as a closed structure extending from the inner wall of the tubular shell to the inner radial direction and to the side of the guiding sheath, and the closed structure of the hemostatic part is tightly attached to the outer surface of a medical appliance after the medical appliance is inserted through the tubular shell.

In a further technical solution, the tubular shell comprises two halves connected by two seams, the two seams extend along the length direction of the tubular shell, and opposite sides of the two halves are provided with hemostatic valves for enclosing to form the hemostatic part.

In further technical scheme, be located two half at least one seam departments of half and be equipped with the undercut buckle, the undercut buckle spanes the seam is connected respectively on two half, and is broken off the back with the fingers and thumb at the undercut buckle, and two half parts separate from the weak area department that two seams constitute.

In a further technical scheme, the tubular shell and the guide sheath are of a split structure, and a tearing seat is arranged at the end part of the guide sheath close to the tubular shell for an operator to tear the guide sheath.

In a further technical scheme, the tearing seat comprises a half pipe body extending along the length direction of the guide sheath, the half pipe body and the guide sheath are integrally formed, and a hand-holding part extending outwards is arranged on the outer wall of the half pipe body.

In a further technical scheme, the one end that half body closes on the tubulose casing is equipped with the linkage segment, be equipped with helicitic texture on the linkage segment, the linkage segment concatenation of two half bodies forms a complete threaded connection portion and sets up the helicitic texture on the tubulose casing outer wall and constitutes to twist soon the cooperation.

In a further aspect, the handle extends radially outward of the body half.

In a further technical scheme, the upper surface and/or the lower surface of the handheld part is/are provided with anti-slip grains.

Compared with the prior art, the invention has the following technical effects:

when the tearable sheath tube provided by the invention is inserted into a blood vessel or an artificial blood vessel, blood flows back and fills the lumen inside the whole hemostasis part, and the closed structure is forced to be completely closed due to the pressure of the blood, so that the outflow of the blood is effectively prevented, and the risk of blood loss is reduced; when the medical appliance enters the blood vessel or the artificial blood vessel through the closed structure, the closed structure is tightly attached to the outer surface of the medical appliance due to the pressure of blood and the elasticity of the hemostatic part, so that the blood of the medical appliance is prevented from flowing out in the process of passing through the tubular shell, and the risk of blood loss is reduced.

The tearable sheath provided by the invention has excellent reliability, can effectively reduce the risk of blood loss, and can prevent blood from flowing out through the sheath.

Drawings

FIG. 1 is a schematic view of a tearable sheath according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the tearable sheath of FIG. 1;

the numbering in the figures illustrates: 10. a tubular housing; 11. a hemostatic section; 111. a hemostatic valve; 12. seaming; 13. a half portion; 14. undercutting the buckles; 20. an introducer sheath; 30. a tearing seat; 31. a half pipe body; 311. a connecting section; 32. a hand-held portion; 321. and (4) anti-skid lines.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified by combining the specific drawings.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The tearable sheath provided by the invention is placed in a vessel vein to provide a passage for other intravascular medical devices.

As described above, referring to fig. 1 and 2, the tearable sheath according to the present invention includes a tubular casing 10 capable of being torn and an introducer sheath 20 disposed at an end of the tubular casing 10 and capable of being torn; the hemostatic section 11 is disposed inside the tubular casing 10, the hemostatic section 11 is configured as a closed-end structure extending from the inner wall of the tubular casing 10 to the inner side of the guide sheath 20, and the closed-end structure of the hemostatic section 11 is closely attached to the outer surface of the medical device after the medical device is inserted through the tubular casing 10.

Based on the technical scheme provided by the invention, the hemostatic part 11 is arranged in the tubular shell 10, and the hemostatic part 11 is a closed structure which is constructed to extend inwards from the inner wall of the tubular shell 10 in the radial direction and towards the side of the guide sheath 20, so that when the tearable sheath tube provided by the invention is inserted into a blood vessel or an artificial blood vessel, blood flows back and fills the lumen inside the whole hemostatic part 11, and the closed structure is forced to be completely closed due to the pressure of the blood, thereby effectively preventing the outflow of the blood and reducing the risk of blood loss;

when the medical device enters the blood vessel or the artificial blood vessel through the closed-up structure, the closed-up structure is tightly attached to the outer surface of the medical device due to the pressure of blood and the elasticity of the hemostatic part 11, so that the blood of the medical device is prevented from flowing out in the process of passing through the tubular shell 10, and the risk of blood loss is reduced.

According to the tearable sheath provided by the present invention, when the medical device in the blood vessel needs to be withdrawn after the operation is completed, the tubular housing 10 should be easily torn to separate the hemostatic section 11 from the medical device, so as to ensure the medical device to be easily taken out, as a specific embodiment of the tubular housing 10, as shown in fig. 2, the tubular housing 10 includes two halves 13 connected by two seams 12, the two seams 12 extend along the length direction of the tubular housing 10, and hemostatic valves 111 are provided on the opposite sides of the two halves 13 for enclosing the hemostatic section 11. Specifically, in the present invention, the hemostatic valve 111 is made of a medical silica gel material.

Further, in the present invention, an undercut buckle 14 is provided at least one seam 12 of the two halves 13, the undercut buckle 14 spans the seam 12 and is respectively connected to the two halves 13, and after the undercut buckle 14 is broken, the two halves 13 are separated from a weak area formed by the two seams 12. The undercut of the buckle 14 means that a notch is formed at the root of the buckle, so that the stress of the part is concentrated, and the part is conveniently broken. In particular use, the two halves 13 making up the tubular casing 10 are separated by breaking the undercut tabs 14, so as to disengage the haemostatic valves 111 arranged on opposite sides of the two halves 13 from the medical device.

According to the tearable sheath catheter provided by the present invention, the tubular housing 10 and the introducer sheath 20 are of a split structure, and a tear seat 30 is provided at an end of the introducer sheath 20 close to the tubular housing 10 for an operator to tear the introducer sheath 20. The split structure is adopted, so that the manufacturing is facilitated.

In the present invention, the introducer sheath 20 is also provided with two weak slits extending along the length direction thereof, and when the operator holds the tearing seat 30 and pulls the tearing seat to both sides, the introducer sheath 20 is separated from the two weak slits provided thereon.

Further, as a specific embodiment of the tearing seat 30, the tearing seat 30 includes a half tube 31 extending along the length direction of the introducer sheath 20, the half tube 31 is integrally formed with the introducer sheath 20, and a hand-holding portion 32 extending outward is provided on the outer wall of the half tube 31. In particular use, the introducer sheath 20 is subsequently torn after the tear seat 30 is torn.

Further, in the present invention, a connection section 311 is disposed at one end of the half pipe 31 close to the tubular casing 10, a thread structure is disposed on the connection section 311, and the connection sections 311 of the two half pipe 31 are spliced to form a complete thread connection part, which forms a screwing fit with the thread structure disposed on the outer wall of the tubular casing 10.

That is, in a specific embodiment of the present invention, the tubular housing 10 is connected to the end of the introducer sheath 20 through two tearing seats 30, and specifically, the end of the tubular housing 10 is connected to the two tearing seats 30 through a screw. Therefore, the manufacturing of each part is facilitated, and the assembly and the connection are simple and convenient.

Further, in the present invention, the handle portion 32 of the tearing seat 30 extends outward along the radial direction of the half-tube 31, so as to provide more operating space for the operator and facilitate the operation of tearing the introducer sheath 20.

Furthermore, in the present invention, the upper surface, the lower surface, or both the upper surface and the lower surface of the handheld portion 32 are provided with the anti-slip pattern 321, so that the friction force of the operator gripping the handheld portion 32 can be increased, and the operator can tear the introducer sheath 20 by applying force.

The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A tearable sheath, comprising a tearable tubular casing (10) and a tearable introducer sheath (20) disposed at an end of the tubular casing (10), wherein a hemostatic portion (11) is disposed in the tubular casing (10), the hemostatic portion (11) is configured as a closed-end structure extending radially inward from an inner wall of the tubular casing (10) and to a side of the introducer sheath (20), and the closed-end structure of the hemostatic portion (11) is closely attached to an outer surface of a medical device after the medical device is inserted through the tubular casing (10).

2. Tearable sheath according to claim 1, wherein the tubular shell (10) comprises two halves (13) connected by two seams (12), the two seams (12) extending in the length direction of the tubular shell (10), and on opposite sides of both halves (13) hemostatic valves (111) are provided for enclosing forming the hemostatic section (11).

3. Tearable sheath according to claim 2, characterized in that at least one seam (12) of the two halves (13) is provided with an undercut snap (14), which undercut snap (14) spans the seam (12) and is connected to the two halves (13), respectively, and that after breaking of the undercut snap (14) the two halves (13) are separated from the weak area where the two seams (12) are configured.

4. The tearable sheath according to claim 1, wherein the tubular housing (10) and the introducer sheath (20) are of a split structure, and a tearing seat (30) is provided at an end of the introducer sheath (20) close to the tubular housing (10) for an operator to tear the introducer sheath (20).

5. The tearable sheath according to claim 4, wherein the tearing seat (30) includes a half tube (31) extending in a length direction of the introducer sheath (20), the half tube (31) is integrally formed with the introducer sheath (20), and a hand-held portion (32) extending outward is provided on an outer wall of the half tube (31).

6. The tearable sheath according to claim 5, wherein the half-tube body (31) has a connection section (311) at an end adjacent to the tubular casing (10), the connection section (311) has a thread structure, and the connection sections (311) of the two half-tube bodies (31) are joined to form a complete thread connection to form a screw-fit with the thread structure on the outer wall of the tubular casing (10).

7. The tearable sheath according to claim 4, wherein the hand-held portion (32) extends radially outward of the half-tube body (31).

8. The tearable sheath according to claim 4, wherein an upper surface and/or a lower surface of the hand-held portion (32) is provided with an anti-slip pattern (321).