CN216060595U

CN216060595U - Endoscope biopsy sampling device

Info

Publication number: CN216060595U
Application number: CN202122244793.XU
Authority: CN
Inventors: 姚锋
Original assignee: Hangzhou Anjisi Medical Science And Technology Co ltd
Current assignee: Hangzhou Anjisi Medical Science And Technology Co ltd
Priority date: 2020-10-12
Filing date: 2021-09-16
Publication date: 2022-03-18
Anticipated expiration: 2031-09-16

Abstract

The utility model relates to a medical instrument device, in particular to an endoscope living tissue sampling device. The device includes pincers cup, sheath pipe, control rope and handle, and its structural feature is: the tissue grasping forceps are further provided with a limiting part which can abut against the proximal ends of the forceps cups, so that the proximal ends of the two forceps cups are symmetrically distributed on two sides of the middle shaft after tissue grasping. The utility model can ensure that the proximal ends of the two forceps cups are positioned in the outer surface profile of the cup base, and prevent the proximal ends of the forceps cups from scratching a forceps channel in the process of withdrawing the endoscope.

Description

Endoscope biopsy sampling device

Technical Field

The utility model relates to a structure of a medical instrument, in particular to an endoscope living tissue sampling device.

Background

Gastrointestinal endoscopy is an important means for diagnosing gastrointestinal diseases, and mainly comprises endoscopic visual diagnosis and pathological diagnosis, which are regarded as the "gold standard" for diagnosing gastrointestinal diseases. Biopsy forceps are the most commonly used tool for obtaining pathological samples under endoscopic examination, and enter a patient through an endoscopic forceps channel to grasp a living tissue at a target site for subsequent pathological examination to diagnose a disease condition.

The common steps for obtaining pathological samples using biopsy forceps are as follows: when the cup mouth of the forceps is in a closed state, the biopsy forceps are introduced into the endoscopic forceps channel; opening the cup mouth of the pliers; the forceps head is abutted against the target part and the opening of the forceps cup is closed, and living tissue of the target part is clamped in the opening of the forceps cup; the biopsy forceps are then pulled proximally to obtain a biopsy sample by continuing to close the forceps cup to cut and/or by pulling the biopsy forceps proximally quickly.

In order to obtain a sufficient biopsy sample, the two forceps cup angles should be as far as possible aligned with the target tissue when using the forceps to obtain the target tissue, and for the target tissue to be on the side of the endoscope field of view, the user is required to make a trade-off between adjusting the endoscope attitude and maintaining the endoscope field of view. In view of the above situation, a laterally rotatable biopsy forceps is provided, in which a forceps cup close to a target tissue is abutted against the target tissue, and then a sheath tube is pushed towards the target tissue, and the empty stroke of a control rope hung on the forceps cup in a slender sheath tube is utilized to enable two forceps cups to deflect around the abutted position of the forceps cup along the pushing direction of the sheath tube, so that the angle of the opening angle of the forceps cup is just opposite to the target tissue.

However, in actual use, due to the existence of the idle stroke, the forceps cup can not return to the middle position after completing the side-turn sampling holding, and in severe cases, the proximal end of the forceps cup protrudes out of the outer surface of the cup seat. This may result in scratching of the tract by the proximal end of the forceps cup protruding from the outer surface of the cup holder when the user withdraws the biopsy forceps holding tissue from the endoscopic tract.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an endoscope living tissue sampling device with reasonable structural design so as to solve the problem.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

an endoscopic biopsy sampling device comprising: the pair of forceps cups comprises a first forceps cup and a second forceps cup, the first forceps cup and the second forceps cup are respectively provided with a first cup opening and a second cup opening, and the first cup opening and the second cup opening can be mutually opened and closed through rotation; the control wire comprises a first control wire and a second control wire, the far ends of the first control wire and the second control wire are respectively connected with the near end of the forceps cup in a hinged mode, the first control wire controls the first forceps cup to rotate, the second control wire controls the second forceps cup to rotate, the near end of the first control wire and the near end of the second control wire are combined into a common control rope in a welding or winding mode, and the near end of the control wire is fixedly connected with the driving part of the handle; the sheath tube is of a flexible hollow pipeline structure, the control wire is accommodated in the hollow part of the sheath tube, and the near end of the sheath tube is fixedly connected with the handle; the handle driving part controls the axial movement of the control wire in the sheath; the remote end of the sheath tube is fixedly connected with a cup seat, the cup seat is of a U-shaped clamp structure, and the forceps cup is connected to the cup seat in a hinged mode; under the condition that the sheath tube is bent, the control wire has an idle stroke, when the handle is controlled to open the two forceps cups, one of the forceps cups is pushed against the tissue, so that the opening angles of the two forceps cups can be deflected to the abutting side to rotate, and the opening angles of the two forceps cups face to the target tissue; the cup holder is provided with a rigid limiting component, and the limiting component is positioned on a middle shaft of the cup holder; when the forceps cup performs closed rotation, the proximal end of the forceps cup or the distal end of the control wire abuts against the limiting part on the rotation path of the forceps cup, so that the proximal end of the forceps cup is limited to cross the central axis of the cup seat.

Preferably, the distal end of the control wire is provided with a protrusion facing the limiting part, the distal end of the control wire is arranged in a connecting hole at the proximal end of the forceps cup in a penetrating manner, the distal end of the control wire penetrates through the connecting hole and then extends continuously to form the protrusion, and the protrusion and the limiting part form a sufficiently stable support.

Preferably, the proximal end of the forceps cup is provided with a bulge facing the limiting part, the bulge is formed by integrally bending the proximal end of the forceps cup, and the bulge can be firmly abutted with the limiting part.

Preferably, the proximal end of the forceps cup is provided with a projection facing the limiting part, the projection is a bump or a rod formed in an integral molding manner or a welding manner, and the projection can form a sufficiently stable support with the limiting part.

Preferably, the proximal end of the limiting part is provided with a projection extending from the limiting part to the radial direction of the first forceps cup and the second forceps cup, the projection is a protruding point or a rod formed by integral molding or welding, and the limiting part can be firmly and firmly abutted with the forceps cups by the projection.

Preferably, the limiting part is a rod fixedly connected to the inner wall of the cup holder, the rod is perpendicular to the rotation plane of the forceps cup and intersects with the central axis of the cup holder, and the limiting part and the proximal end of the forceps cup form enough stable support.

Compared with the prior art, the utility model has the following advantages and effects:

1. the two forceps cups of the endoscope living tissue sampling device are respectively controlled by the two control wires, and the control wires have idle strokes, so that the angle between the forceps cups and the cup seats can be changed by abutting the forceps cups on the tissue after the opening angle is determined, the relative angle between the forceps cups and the target tissue is changed, and a user can obtain a required target tissue sample.

2. The rigid limiting component is arranged on the middle shaft of the cup holder, and in the process of closing the forceps cup, the limiting component is abutted against the near end of the forceps cup or the far end of the control wire, so that the near end of the forceps cup cannot cross the middle shaft of the cup holder when being closed, and the near end of the forceps cup cannot damage the endoscope forceps channel due to protruding out of the cup holder when tissue is obtained and retreated out of the endoscope channel.

3. The distal end of the control wire continues to extend after penetrating through the forceps cup, and can form more stable support with the limiting part in the closing process of the forceps cup.

4. The proximal end of the forceps cup is provided with a bend or a bulge towards the central axis of the cup seat, so that the proximal end of the forceps cup can be stably abutted against the limiting part in the closing process of the forceps cup.

5. The limiting part is further provided with bulges facing the two forceps cups, so that the clamping device can form more stable support with the near ends of the forceps cups in the closing process of the forceps cups.

Drawings

FIG. 1 is a schematic view of an endoscopic biopsy device according to an embodiment of the present invention.

FIG. 2 is a partial view of an endoscopic biopsy sampling device according to one embodiment of the present invention (with forceps cup closed).

FIG. 3 is a partial view of an endoscopic biopsy device according to one embodiment of the present invention (with the forceps cup open).

FIG. 4 is a schematic view of an endoscopic biopsy device according to one embodiment of the present invention in use.

Fig. 5 is a top view of fig. 3.

FIG. 6 is a partial view of an endoscopic biopsy sampling device according to a second embodiment of the present invention (cup holder not shown).

FIG. 7 is a partial view of an endoscopic biopsy device according to a third embodiment of the present invention.

FIG. 8 is an overall view of a cup holder according to a third embodiment of the present invention.

Description of reference numerals: 10. the forceps comprise a forceps cup, 10A, a first forceps cup, 10B, a second forceps cup, 11, a forceps cup opening, 11A, a first cup opening, 11B, a second cup opening, 20, a cup base, 21, a limiting part, 22, a protrusion, 30, a sheath tube, 40, a control rope, 40A, a first control wire, 40B, a second control wire, 50 and a handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

It should be noted that the term "proximal end" and "distal end" as used herein refers to the direction along the length of the endoscopic biopsy device (which is usually long and linear because the biopsy device is delivered endoscopically to the body for injection), or the direction along which the endoscopic biopsy device enters the body, and is referred to as "proximal end" toward the side where the operator is located and "distal end" toward the side where the operator is located for treatment. The term "proximal" or "distal" of a certain part means that the side of the certain part facing the operator is the "proximal" of the certain part, and the side of the certain part facing the human body to be treated is the "distal" of the certain part.

The "idle stroke" as used herein refers to a space for controlling the bending of the filament in the sheath. The double control wire is bent in the sheath tube to different degrees due to the excessive operation of the proximal end of the handle or the twisting of the sheath tube, so that the forceps cups hung on the double control wire are rotated to different rotation angles.

The term "abutting side" as used herein refers to the side of the two forceps cups that is relatively closer to the target tissue; correspondingly, "tucked side" refers to the side relatively away from the target tissue.

The present invention will be described in further detail with reference to examples, which are illustrative of the present invention and are not to be construed as being limited thereto.

The first embodiment is as follows:

as shown in fig. 1 to 3, an endoscopic biopsy sampling device comprises: the forceps cup 10, the cup holder 20, the limiting part 21, the sheath tube 30, the control rope 40 and the handle 50. The forceps cup 10 comprises a first forceps cup 10A and a second forceps cup 10B, the first forceps cup 10A is provided with a first cup opening 11A, and the second forceps cup 10B is provided with a second cup opening 11B; the distal end of the control rope 40 is branched into a first control wire 40A and a second control wire 40B, wherein the first control wire 40A is arranged in a hole at the proximal end of the first forceps cup 10A in a penetrating manner and controls the rotation of the first forceps cup 10A, and the second control wire 40B is arranged in a hole at the proximal end of the second forceps cup 10B in a penetrating manner and controls the rotation of the second forceps cup 10B, so that the opening and closing of the first cup opening 11A and the second cup opening 11B are controlled; the sheath 30 is a hollow tubular structure, and the control rope 40 is arranged in the sheath 30 in a penetrating way; the proximal end of the sheath 30 and the proximal end of the control cord 40 are respectively connected to the handle 50, and the control cord 40 is manipulated to move axially in the sheath 30 by operating the handle 50 during the operation; the distal end of the sheath tube 30 is fixedly connected with a cup base 20, the cup base 20 is of a U-shaped clamp structure, and the first forceps cup 10A and the second forceps cup 10B are connected with the cup base 20 in a hinged mode; the cup holder 20 is provided with a limiting part 21, and the limiting part 21 is positioned on the middle shaft of the cup holder 20.

As shown in fig. 5, the proximal end of the forceps cup 10 is bent such that the bent portion protrudes toward the stopper 21 (i.e., the direction of the central axis of the cup holder 20), and during the closing rotation of the first and

second forceps cups

10A and 10B, the stopper 21 comes into abutment with the bent portion of the proximal end of the forceps cup 10, thereby blocking the proximal end of the forceps cup 10 from passing through the central axis of the cup holder 20 during the closing rotation.

Next, the operation of sampling a living tissue using the living tissue sampling device of the present invention will be described.

In the insertion stage, the user holds the driving portion of the handle 50 to close the first and

second cup openings

11A and 11B, and then inserts the closed sampling device into the endoscopic artery, and adjusts the endoscope and the sampling device to make the forceps cup 10 close to the target tissue region.

In the opening stage, the driving portion of the handle 50 is operated to move the first control wire 40A and the second control wire 40B distally relative to the sheath 30, so that the first forceps cup 10A and the second forceps cup 10B are respectively rotated around the hinge to open until the proximal legs of the forceps cups abut against the outer surface of the opposite forceps cup (see fig. 4-a).

In the adjustment stage, if the opening angles of the first cup 11A and the second cup 11B are not aligned with the target tissue site, the endoscope has no room for further adjustment or the current visual field is easily lost. Assuming that the target tissue is located on the side close to the second cup rim 11B (i.e., the second cup rim 11B is located on the abutting side), the second forceps cup 10B is abutted against the tissue. Because the control rope 40 in the tensioned state has idle stroke in the sheath tube 30, further, the sheath tube 30 is pushed to make the second forceps cup 10B rotate towards the abutting part, the first forceps cup 10A synchronously rotates under the abutting of the legs of the second forceps cup 10B, so that the opening angles of the first forceps cup 10A and the second forceps cup 10B are opposite to the target tissue part, and the target tissue fully falls into the first cup opening 11A and the second cup opening 11B. In the process of side rotation, the first cup opening 11A is located at the wrapping side, and the bent portion of the proximal end of the first forceps cup 10A abuts against the limiting part 21 arranged on the central axis of the cup holder 20, so that the first forceps cup 10A does not pass or excessively pass through the central axis of the cup holder 20 due to the pushing of the cup leg of the second forceps cup 10B (see fig. 4-B).

In the grasping stage, the driving portion of the handle 50 is grasped, so that the first and

second control wires

40A and 40B pull the first and second forceps cups (10A and 10B) proximally, so that the first and

second jaws

11A and 11B receive the target tissue in the forceps cups (see fig. 4-c). In the process, since the proximal bent portion of the first forceps cup 10A abuts against the stopper 21 provided in the central axis of the cup holder 20, the first control wire 40A cannot further pull the leg of the first forceps cup 10A proximally, and the second cup mouth 11B continues to move under the further pulling of the second control wire 40B (see fig. 4-d) until the second cup mouth 11B and the first cup mouth 11A are closed (see fig. 4-e). To this end, the first cup opening 11A and the second cup opening 11B are symmetrically distributed on two sides of the central axis of the cup holder 20, and the proximal ends of the first forceps cup 10A and the second forceps cup 10B do not protrude out of the outer surface of the cup holder 20.

In the retrograde phase, the driving portion of the handle 50 is held in a gripped state, so that the first and

second cups

11A and 11B can grasp the target tissue firmly enough, and the sheath 30 is rapidly pulled proximally, thereby removing the target tissue.

Example two:

in this embodiment, the rest of the features are the same as those of the first embodiment except that the abutting manner of the limiting part 21 is different.

As shown in fig. 6, the stopper member 21 has a protrusion 22 formed on the central axis thereof, and the stopper member 21 is held against the proximal end of the forceps cup 10 by the protrusion 22 formed thereon during the closing rotation of the first and

second forceps cups

10A and 10B.

During the closing rotation of the forceps cup 10, the first forceps cup 10A reaches the central axis of the cup holder 20 earlier than the second forceps cup 10B, and the proximal end of the first forceps cup 10A abuts against the protrusion 22 of the stopper 21 provided on the central axis of the cup holder 20

Example three:

As shown in fig. 7, the position limiting component 21 is perpendicular to the central axis of the cup holder 20, and is a rigid cross bar fixedly connected to the cup holder 20 through the central axis of the cup holder 20.

As shown in FIG. 8, during the closing rotation of the first and

second forceps cups

10A and 10B, the stop member 21 comes into abutment with the proximal ends of the forceps cups 10.

During the closing rotation of the forceps cup 10, the first forceps cup 10A reaches the central axis of the cup holder 20 earlier than the second forceps cup 10B, and the proximal end of the first forceps cup 10A abuts against the stopper 21 provided in the central axis of the cup holder 20.

In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes of the structure, the characteristics and the principle of the utility model which are described in the patent conception of the utility model are included in the protection scope of the patent of the utility model. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. An endoscopic biopsy sampling device, characterized by: at least comprises the following steps:

the pliers cup comprises a first pliers cup and a second pliers cup, the first pliers cup is provided with a first cup opening, the second pliers cup is provided with a second cup opening, and the first cup opening and the second cup opening can be opened and closed in a relatively rotating mode;

the distal end of the control wire is connected to the proximal end of the forceps cup and comprises a first control wire for controlling the first forceps cup to rotate and a second control wire for controlling the second forceps cup to rotate;

a sheath, the control wire passing through the sheath;

a handle connected to the control wire and the proximal end of the sheath for controlling axial movement of the control wire within the sheath;

the clamp comprises a sheath tube, a forceps cup, a cup base and a limiting component, wherein the distal end of the sheath tube is provided with the cup base, the forceps cup is hinged to the cup base, the cup base is of a U-shaped clamp structure, and the central shaft of the cup base is provided with the rigid limiting component;

wherein the proximal end of the forceps cup or the distal end of the control wire abuts against the limiting part on the rotation path of the forceps cup so as to limit the proximal end of the forceps cup to cross the central axis of the cup seat.

2. An endoscopic biopsy sampling device according to claim 1, wherein: the proximal end of the forceps cup is provided with a bulge facing the limiting part, and when the forceps cup rotates in a closing mode, the bulge is abutted against the limiting part.

3. An endoscopic biopsy sampling device according to claim 1, wherein: the proximal end of the limiting part is provided with a bulge facing the first forceps cup and the second forceps cup, and when the forceps cups rotate in a closing mode, the bulge and the limiting part are abutted.

4. An endoscopic biopsy sampling device according to claim 1, wherein: the limiting component is a rod piece arranged in the cup seat, and when the forceps cup rotates in a closing mode, the near end of the forceps cup abuts against the rod piece.