CN219374869U

CN219374869U - Foreign matter forceps

Info

Publication number: CN219374869U
Application number: CN202320581579.XU
Authority: CN
Inventors: 赵学凯; 车文成; 管晨彤
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-07-21
Anticipated expiration: 2033-03-20

Abstract

The utility model particularly relates to a pair of foreign matter pliers, which comprises a guide pipe, a push-pull rod and a pliers head, and is characterized in that the pliers head comprises a first pliers claw and a second pliers claw, the first pliers claw is cylindrical, the second pliers claw is an arc piece with a semicircular section, the inner diameter of the second pliers claw is matched with the outer diameter of the first pliers claw, the second pliers claw is fixed on one side of the front end of the guide pipe, a pin shaft is arranged in the front end of the guide pipe, the rear end of the first pliers claw is hinged on the pin shaft through a support, the support is positioned on one side of the rear end of the first pliers claw, which is far away from the second pliers claw, the guide pipe at the support is provided with a rotating groove, the front end of the push-pull rod is provided with an elastic rod body, and the front end of the elastic rod body is connected to one side of the rear end of the first pliers claw, which is close to the second pliers claw. The utility model has the advantages of reasonable structure, convenient use and safety.

Description

Foreign matter forceps

Technical Field

The utility model particularly relates to a pair of foreign body forceps.

Background

The foreign matters existing in the blood vessel cavity at present comprise "iatrogenic" and "non-iatrogenic" foreign matters, and the "iatrogenic" foreign matters comprise: stents, screens, broken guidewires, catheters, etc. "non-iatrogenic" foreign substances include: various emboli in the lumen of blood vessels, such as fresh thrombus, fibrous plaque, etc.

The current capturing devices for removing the foreign matters in the blood vessel are divided into net basket type, ferrule type and clamp type. The clamp-shaped capturing device is mainly used for taking out broken guide wires, for example, the technology disclosed by China patent office 2020.08.18, with the publication number of CN211271010U, is named as an utility model patent technology of a minimally invasive surgery interventional catheter built-in capturing clamp set, and comprises a pushing sleeve, a sliding groove is formed in the side wall of an inner cavity of the pushing sleeve, a sliding block matched with the sliding groove is arranged on the outer side of the pushing rod, a thread groove is formed in the middle of one end of the pushing rod, far away from the pushing sleeve, of the pushing rod, a screw is connected in the thread groove in a threaded manner, one end of the screw, far away from the pushing rod, is connected with an elastomer Y-shaped part, and wide-angle clamp claws are connected at two ends of the elastomer Y-shaped part, far away from the screw. The utility model can be used for clamping foreign matters well when various catheters, guide wires and other special instruments break in the large blood vessel and the joint surfaces of the clamp claws are saw-tooth-shaped

The wide-angle clamp claw of the technology has higher clamping success rate when the broken guide wire floats in a large blood vessel and one end in a heart chamber is free, the broken guide wire clings to the inner wall of the blood vessel and is easy to damage the blood vessel when being grasped, and when the opened clamp claw is used for stirring the broken guide wire clinging to the inner wall of the blood vessel, the guide wire is not easy to stir and is easy to damage the blood vessel when being stirred.

Disclosure of Invention

The utility model aims to provide a pair of foreign body forceps, which changes the shape of forceps jaws, wherein a first forceps jaw is of a cylindrical structure, a second forceps jaw is of an arc piece structure with a semicircular section, and a guide wire clung to the inner wall of a blood vessel can be conveniently and rapidly clamped and taken out.

The utility model is realized by the following technical scheme:

the foreign matter forceps are characterized in that the forceps head comprises a first forceps jaw and a second forceps jaw, the first forceps jaw is cylindrical, the second forceps jaw is arc-shaped, the cross section of the second forceps jaw is semicircular, the inner diameter of the second forceps jaw is matched with the outer diameter of the first forceps jaw, the second forceps jaw is fixed on one side of the front end of the catheter, a pin shaft is arranged in the front end of the catheter, the rear end of the first forceps jaw is hinged to the pin shaft through a support, the support is located on one side, far away from the second forceps jaw, of the rear end of the first forceps jaw, a rotating groove is formed in the catheter at the support, an elastic rod body is arranged at the front end of the push-pull rod, and the front end of the elastic rod body is connected to one side, close to the second forceps jaw, of the rear end of the first forceps jaw.

The first clamp claw is cylindrical, the front end is rounded, and the two corners and the two sides of the front end of the second clamp claw are rounded, so that the damage to the vessel wall when the clamp head enters and exits the vessel is prevented.

The second clamp claw is of a semicircular arc piece structure, can be attached to the inner wall, and can be used for shoveling a guide wire which is attached to the inner wall of a blood vessel into the inner wall of the second clamp claw when moving forwards, and at the moment, the first clamp claw rotates towards the second clamp claw and finally is embedded into the second clamp claw by pulling the push-pull rod backwards, so that the two clamp claws are folded, and the guide wire is clamped and taken out.

The pin shaft of the utility model is arranged inside the front end of the catheter, and the two ends of the pin shaft do not extend out of the catheter, and the pin shaft is arranged on the side far away from the second clamp claw instead of being arranged on the central line of the catheter.

The first clamp claw of the utility model rotates by taking the pin shaft as an axis under the action of the push-pull rod, so as to realize the opening and closing of the clamp claw, and a rotating groove is formed on the side wall of the front end of the catheter for facilitating the rotation of the first clamp claw.

The elastic rod body is made of polyurethane elastomer materials or plastic rods with good toughness, and can deform along with rotation when the first clamp claw rotates.

In order to enhance the stability of the push-pull rod during pushing, a sliding block and sliding groove connecting structure in CN211271010U can be adopted between the catheter and the push-pull rod.

Further, the cross section of the side wall at the front end of the second clamp claw is of a wedge-shaped structure.

The section of the side wall of the front end of the second clamp claw is of a wedge-shaped structure, so that a guide wire closely attached to the inner wall of a blood vessel can be shoveled into the inner wall of the second clamp claw more conveniently

Furthermore, a plurality of semi-annular protrusions are distributed on the inner side surface of the first clamp claw, the annular protrusions are equidistantly arranged along the length direction of the first clamp claw, and grooves matched with the annular protrusions are formed on the inner side of the second clamp claw.

In order to further enhance the clamping force of the jaws, a semi-annular bulge is arranged on the inner side surface (the side surface pointing to the second jaw) of the first jaw, a matched groove is arranged on the second jaw, the clamping guide wire is firmer, and the guide wire is not easy to slip when being taken out.

Further, the front end of the first claw is hemispherical, and the front end of the first claw protrudes out of the second claw.

The front end of the first clamp claw is hemispherical and protrudes out of the second clamp claw, and the damage to the blood vessel is not easy to occur when the clamp claw is inserted into the blood vessel.

The utility model has the advantages of reasonable structure, convenient use and safety. The guide wire which is tightly attached to the inner wall of the blood vessel can be rapidly and conveniently clamped and taken out, and the damage to the blood vessel is not easy to occur during the operation.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged schematic view of the cross-sectional structure A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the present utility model;

FIG. 4 is an enlarged view of the portion B of FIG. 3;

fig. 5 is a schematic view of the structure of the pliers of the utility model when the pliers head is opened.

As shown in the figure: 1. a push-pull rod; 2. a conduit; 3. a second jaw; 4. a first jaw; 5. an elastic rod body; 6. a pin shaft; 7. a bracket; 8. a rotating groove; 9. semi-annular bulge.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model. It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

As shown in fig. 1-4: the push-pull rod 1 is arranged in the catheter 2, the arc-shaped second clamp claw 3 with a semicircular section is arranged on one side of the front end of the catheter 2, the section of the side wall of the front end of the second clamp claw 3 is of a wedge-shaped structure, the pin shaft 6 is arranged in the front end of the catheter 2, the first clamp claw 4 is cylindrical, 3 semi-annular protrusions 9 are distributed on the inner side surface (opposite to the side of the second clamp claw 3) at equal intervals along the length direction of the first clamp claw 4, and grooves matched with the semi-annular protrusions 9 are formed in the inner side of the second clamp claw 3. The front end of the first clamp claw 4 is hemispherical, the rear end of the first clamp claw is hinged to the pin shaft 6 through the support 7, the support 7 is located on the side, far away from the second clamp claw 3, of the rear end of the first clamp claw 4, the guide pipe 2 at the support 7 is provided with a rotating groove 8, the front end of the push-pull rod 1 is provided with an elastic rod body 5, and the front end of the elastic rod body 5 is connected on the side, close to the second clamp claw 3, of the rear end of the first clamp claw 4.

When the utility model is used, the initial state is as shown in fig. 1 and 2, the first clamp claw 4 is embedded into the second clamp claw 3, the front end of the first clamp claw protrudes out of the second clamp claw 3, after the catheter 2 is integrally inserted into a blood vessel, when the catheter is about to reach a guide wire close to the inner wall of the blood vessel, the push-pull rod 1 is pushed forward, so that the first clamp claw 4 is opened, the catheter 2 is rotated, the second clamp claw 3 is made to be attached to the inner wall of the blood vessel at the guide wire, the catheter 2 is pushed forward to drive the second clamp claw 3 to advance, the front end of the guide wire is shoveled into the second clamp claw 3, then the lifting pull rod 1 is pulled backward, the first clamp claw 4 is reset and embedded into the second clamp claw, the closure of the clamp head is realized, the catheter is pulled out, and the guide wire can be taken out.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

Claims

1. The utility model provides a foreign matter pincers, including the pipe, push-pull rod and binding clip, its characterized in that binding clip includes first claw and second claw, first claw is cylindrical, the second claw is semicircular arc piece shape in cross-section, the internal diameter of second claw matches with the external diameter of first claw, the second claw is fixed in pipe front end one side, the inside round pin axle that is equipped with of pipe front end, the rear end of first claw articulates at the round pin epaxially through the support, the support is located the first claw rear end and keeps away from the second claw one side, the pipe of support department is equipped with the rotation groove, the front end of push-pull rod is equipped with the elastic rod body, the elastic rod body front end is connected and is close to the second claw one side at first claw rear end.

2. A pair of foreign matter forceps as claimed in claim 1, wherein the front end side wall section of the second forceps claw has a wedge-shaped structure.

3. The pair of foreign matter forceps as claimed in claim 1, wherein the first forceps jaw has a plurality of annular protrusions distributed on its surface, the annular protrusions are disposed at equal intervals along the length direction of the first forceps jaw, and the second forceps jaw has a groove on its inner side for matching with the annular protrusions.

4. The pair of foreign matter forceps as claimed in claim 1, wherein the front end of the first jaw is hemispherical, and the front end thereof protrudes from the second jaw.