CN107890356B

CN107890356B - Biopsy forceps capable of continuously sampling

Info

Publication number: CN107890356B
Application number: CN201710758718.0A
Authority: CN
Inventors: 万齐全; 马颖; 刘敏; 孙艳平
Original assignee: Third Xiangya Hospital of Central South University
Current assignee: Third Xiangya Hospital of Central South University
Priority date: 2017-08-29
Filing date: 2017-08-29
Publication date: 2020-05-22
Anticipated expiration: 2037-08-29
Also published as: CN107890356A

Abstract

The invention discloses a biopsy forceps capable of continuously sampling, belongs to the field of medical equipment, and can continuously sample during sampling.

Description

Biopsy forceps capable of continuously sampling

Technical Field

The invention relates to the field of medical equipment, in particular to a biopsy forceps.

Background

Biopsy forceps are indispensable tools for taking pathological specimens in endoscopy, the biopsy forceps are usually disposable in order to prevent infection, the existing biopsy forceps can only take one sample at a time, and when multiple samples need to be taken, the biopsy forceps need to be replaced or taken out of a human body, so that the cost is high, and patients suffer.

Application number 201610176557.X, chinese invention patent entitled continuous sampling biopsy forceps, discloses a continuous sampling biopsy forceps comprising a forceps head bracket and two forceps heads. The two forceps heads are hinged to the inner side of the front end of the forceps head bracket through independent connecting columns respectively, so that a space for accommodating a plurality of samples is formed between the two forceps heads; further, by providing a sampling needle extending between the two bits on the platform of the bit holder, a plurality of samples obtained by continuous sampling can be arranged in sequence on the sampling needle. The existing multiple sampling biopsy forceps need a sample taken later to push the sample taken earlier backwards in actual use, but in sampling, the forceps head is closed tightly, the sample taken earlier is difficult to push backwards, so that in actual use, multiple sampling operation is difficult, the sample taken earlier sometimes falls down, and the sample taken later is difficult to push forwards.

Disclosure of Invention

The invention discloses a biopsy forceps capable of continuously sampling, which aims to solve the problems in the prior art and comprises a forceps head, a connecting pipe, a handle and a slide block, wherein the forceps head and the handle are positioned at two ends of the connecting pipe, a sampling needle is arranged in the forceps head, and the slide block is positioned on the connecting pipe, and the biopsy forceps is characterized in that the forceps head comprises a first forceps head and a second forceps head, the forceps head is provided with a hinged joint, the first forceps head and the second forceps head are hinged at the front end of the hinged joint, the center of the hinged joint is provided with a fixing device for fixing the sampling needle, the fixing device is provided with a channel for the sampling needle to pass through, the tail ends of the first forceps head and the second forceps head are connected with a connecting wire for controlling the opening and closing of the forceps head, the fixing device is provided with a movable channel for the movement of the connecting wire, the tail end of the sampling needle is connected with a sampling needle wire for controlling the, the convex part extends into the connecting pipe, and the button and the connecting pipe are provided with return springs;

the sliding block comprises a first sliding block and a second sliding block, the first sliding block and the second sliding block respectively control two central parts in the connecting pipe, and the two central parts are connected through a sliding block spring.

When the sampling needle is used, the convex part of the button is generally about 1 cm and extends into the connecting pipe or the corresponding tail end, the button cannot normally push the sampling needle to advance due to the action of the spring, but when the button is pressed by hands, the force of the spring can be overcome to push the sampling needle to advance.

The operating principle of the slider is that the first slider controls the central part of the first slider, and a movable channel is usually arranged on the tubular surface of the handle, the first slider is connected with the central part through a connecting device, the connecting device passes through the channel, the prior art can be adopted in the part, and the difference from the prior art is that two sliders are arranged, the central parts of the two sliders are provided with springs, and the two sliders are connected only through the springs, namely are not connected outside the tube. When two sliders contact, the spring is in the state of stretching, the power that the spring received at this time is F, and effort is also F between two sliders, when pulling the second slider behind the hand, when beginning, two binding clip from opening to the contact, the tension that the line (henceforth called connecting wire) of control binding clip switching received is less, when the binding clip switching contact, the tension of connecting wire can increase suddenly, reach F (F technical staff is according to the result control of binding clip switching force test), at this time, two sliders will begin to do the motion of a phase separation, the second slider continues backward movement, first slider will stop or the motion is slow, just so can guarantee that the binding clip can not be closed too tightly. But in actual use it operates according to the following procedure:

the method comprises the following steps: the biopsy forceps are deeply inserted into a human body, a sampling position is fixed by using a sampling needle, and the first sliding block is pulled backwards by hand until the biopsy forceps are tightly closed;

step two: after the clamping device is tightly closed, the second sliding block is fixed by hands, the first sliding block is loosened, the first sliding block can reset, and when the clamping force of the two clamp heads is reset to be smaller, the resetting is stopped. The two clamp heads can be controlled to be in a state that the opening and the closing are not too tight in clamping force, but the sampling tissue can be fixed;

step three: the button is pressed by fingers, and the sampling needle can move forward relative to the sampling tissue due to the untight opening and closing of the forceps head;

step four: the second sliding block is pushed forwards, the binding clip is opened, the button is slowly released, the sampling needle is reset, and the sampled tissue can be fixed at the rear position of the sampling needle;

and step five, repeating the steps to finish taking a plurality of tissue samples at one time.

As an improvement, the first tong head and the second tong head are hinged on the hinge joint through pins, and the middle of each pin is provided with a fixed sampling needle and a through hole for the sampling needle to pass through.

As an improvement, connecting wires respectively connected with the first binding clip and the second binding clip are integrated through a connector, and a through hole for a sampling needle wire or a sampling needle to pass through is arranged in the middle of the connector.

As the improvement, the sampling needle is provided with a limit column for limiting the transition retreat of the sampling needle, the design can prevent the retreat of the sampling needle carelessly, and the cooperation of the limit column and a button reset spring can ensure that the sampling needle advances and retreats at a fixed position to further finish the sampling operation.

As an improvement, the first forceps head and the second forceps head are respectively provided with a channel for placing a sampling needle, when the first forceps head and the second forceps head are closed, the sampling needle is positioned in a channel formed by combining the two channels and can move forwards and backwards, the design can ensure that the sampling needle moves forwards and pushes sampled tissues backwards under the condition that the tissues are not moved, and further better finishes multiple sampling, wherein the design of the channels is designed according to the size of the cross section of the sampling needle and is slightly larger than the cross section of the sampling needle.

The invention has the beneficial effects that: the invention controls the tightness of the opening and closing of the forceps head to enable the forceps head to reach the optimal closed state, further controls the forward movement of the sampling needle to enable the sampled tissue to retreat, achieves accurate and multiple sampling, can complete multiple sampling on one human body of the biopsy forceps, and reduces the cost and the pain of a patient.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a block diagram of the binding clip;

FIG. 3 is a block diagram of the binding clip 2;

FIG. 4 is another side schematic view of the binding clip;

FIG. 5 is a structural view of the sampling needle with a stopper post;

FIG. 6 is a view of the jaw from the front;

FIG. 7 is an internal structural view of the binding clip;

FIG. 8 is a connection view of two center sections;

FIG. 9 is a block diagram of a button;

FIG. 10 is a block diagram of the handle;

FIG. 11 is a view from the rear side;

FIG. 12 is a cross-sectional view of the cross-section of FIG. 11A-A;

the labels in the figure are: 1-binding clip, 101-first binding clip, 102-second binding clip, 103-hinged joint, 1031-movable channel, 1032-fixing device, 104-sampling needle, 1041-limiting column, 105-connecting head, 106-connecting line, 2-connecting tube, 3-handle, 301-button, 302-reset spring, 4-sliding block, 401-first sliding block, 402-second sliding block, 403-central part and 404-sliding block spring.

Detailed Description

Specific example 1: a biopsy forceps capable of continuously sampling comprises a forceps head 1, a connecting pipe 2, a handle 3 and a sliding block 4, wherein the forceps head and the handle are positioned at two ends of the connecting pipe, a sampling needle 104 is arranged in the forceps head, and the sliding block is positioned on the connecting pipe, and is characterized in that the forceps head comprises a first forceps head 101 and a second forceps head 102, the forceps head is provided with a hinged joint 103, the first forceps head and the second forceps head are hinged at the front end of the hinged joint, the center of the hinged joint is provided with a fixing device 1032 for fixing the sampling needle, the fixing device is provided with a passage for the sampling needle to pass through, the tail ends of the first forceps head and the second forceps head are connected with a connecting wire 106 for controlling the opening and closing of the forceps head, the fixing device is provided with a movable passage 1031 for the movement of the connecting wire 106, the tail end of the sampling needle is connected with a sampling needle wire for controlling the advance and retreat of the sampling needle, a button 301 is, the button and the connecting pipe are provided with a return spring 302;

the slider 4 includes a first slider 401 and a second slider 402, which respectively control two central portions in the connecting pipe, and the two central portions are connected by a slider spring.

First binding clip and second binding clip pass through the pin and articulate on articulated joint 103, are equipped with the through-hole that fixed sample needle and be used for the sample needle to pass through in the middle of the pin, and the connecting wire 106 that is connected respectively with first binding clip and second binding clip passes through connector 105 set, is equipped with the through-hole that is used for sample needle line or sample needle to pass through in the middle of the connector 105. The sampling needle is provided with a limit column 1041 for limiting the transition retreat of the sampling needle.

The first binding clip and the second binding clip are respectively provided with a channel for placing a sampling needle, and when the first binding clip and the second binding clip are closed, the sampling needle is positioned in a channel formed by combining the two channels and can move forwards and backwards.

Claims

1. A biopsy forceps capable of continuously sampling comprises a forceps head (1), a connecting pipe (2), a handle (3) and a sliding block (4), wherein the forceps head and the handle are positioned at two ends of the connecting pipe, a sampling needle (104) is arranged in the forceps head, and the sliding block is positioned on the connecting pipe, and the biopsy forceps is characterized in that the forceps head comprises a first forceps head (101) and a second forceps head (102), the forceps head is provided with a hinged joint (103), the first forceps head and the second forceps head are hinged at the front end of the hinged joint, the center of the hinged joint is provided with a fixing device (1032) for fixing the sampling needle, the fixing device is provided with a passage for the sampling needle to pass through, the tail ends of the first forceps head and the second forceps head are connected with a connecting wire (106) for controlling the opening and closing of the forceps head, the fixing device is provided with a movable passage (1031) for the movement of the connecting wire (106), and the tail end of, a button (301) is arranged in the handle, the button is provided with a convex part, the convex part extends into the connecting pipe, and the button and the connecting pipe are provided with a return spring (302);

the sliding block (4) comprises a first sliding block (401) and a second sliding block (402), the first sliding block and the second sliding block respectively control two central parts in the connecting pipe, and the two central parts are connected through a sliding block spring.

2. Biopsy forceps capable of sampling continuously according to claim 1, characterized in that the first forceps head and the second forceps head are hinged on a hinged joint (103) through pins, and a sampling needle is fixed and a through hole for the sampling needle to pass through is arranged in the middle of the pins.

3. Biopsy forceps capable of sampling continuously according to claim 2, characterized in that the connecting lines (106) connected with the first forceps head and the second forceps head are gathered by a connecting head (105), and a through hole for the sampling needle line or the sampling needle to pass through is arranged in the middle of the connecting head (105).

4. The biopsy forceps capable of sampling continuously according to claim 3, wherein the sampling needle is provided with a limit column (1041) for limiting the transition and retreat of the sampling needle.

5. The biopsy forceps capable of sampling continuously according to claim 1, wherein the first forceps head and the second forceps head are respectively provided with a channel for placing the sampling needle, and when the first forceps head and the second forceps head are closed, the sampling needle is positioned in a channel formed by the two channels and can move forwards and backwards.