WO2020052345A1 - Tissue forceps for digestive tract - Google Patents

Abstract

Tissue forceps for digestive tract, comprising forceps arms capable of being opened or closed and control arms for controlling an opening or closing angle of the forceps arms. A pull cable (7) is provided in a handle (10); the handle (10) controls the opening or closing of the forceps arms by means of cooperation of the pull cable (7) and the control arms; the forceps arms are a set of long arms (1) and the control arms are a set of short arms (2); one end of the short arm (2) is movably connected to a forceps base (6), and the other end of the short arm (2) is connected to the middle part of the long arm (1); one end of a push-pull rod (5) is movably connected to one end of the long arm (1), and the other end of the push-pull rod (5) is connected to the pull cable (7). The tissue forceps can quickly and effectively close a large portion of a digestive tract large wound surface, turn the large wound surface into a small wound surface that can be clamped and closed by an ordinary hemostatic clamp, and effectively suture the wound surface with the existing hemostatic clamp.

Description

Tissue forceps for digestive tract

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on September 11, 2018, with application number 201811056412.1, with the invention name "a tissue forceps for digestive tract", the entire contents of which are incorporated herein by reference. .

Technical field

The invention relates to the field of medical equipment, in particular to a tissue forceps for digestive tract.

Background technique

In recent years, with the rapid development of endoscopic diagnosis and treatment, corresponding to the invasive bleeding or perforation of the digestive system such as the intestine, stomach and other mucous membranes due to surgery or other reasons, the current commonly used hemostasis method is to stop the bleeding with a blood clip, but due to the existing hemostasis The clip opening is too small for large wounds or gastrointestinal perforation. It is difficult to quickly stop bleeding or clip when the gastrointestinal perforation is closed. In emergencies, it can only rely on laparotomy, with the help of a surgeon to perform wound hemostasis or suture surgery. Open surgery not only takes a long time to recover from the wound, but also takes a long time and economic cost, because open surgery is a percutaneous invasive treatment, and the length of hospital stay increases, which also occupies medical resources to a certain extent.

At present, the ligation devices on the market, such as a pouch ring, require multiple hemostatic clips to assist the nylon ligation device to clamp the edge of the wound, so that the wound can be tightened. When the wound is tightened, the hemostatic clip is turned into the wound because of the large wound and many hemostatic clips. Increasing the ratio not only wastes a certain amount of medical resources, but also increases the pain and financial burden on patients.

Summary of the Invention

Object of the invention: The technical problem to be solved by the present invention is to provide a tissue forceps for the digestive tract in view of the shortcomings of the prior art.

In order to solve the above technical problem, the present invention provides a tissue forceps for digestive tract, which includes a handle and a forceps body. The forceps body includes an openable and retractable forceps arm and a control arm for controlling the opening and closing angle of the forceps arm. A cable is provided, and the handle is controlled by the cable and the control arm to open and close the clamp arm.

In the present invention, the clamp arm is a group of long arms, and the control arm is a group of short arms. One end of the short arm is movably connected to the clamp base, and the other end of the short arm is connected to the middle of the long arm. One end is movably connected to one end of the long arm, and the other end of the push-pull rod is connected to the cable.

In the present invention, the short arm includes a first short arm and a second short arm. The first short arm is provided with a set of first through holes, and the second short arm is provided with a set of second through holes. The first clamp base through hole and the second clamp base through hole are provided. The clamp base includes a first pin, and the first pin passes through the first clamp base through hole, the first through hole, the second through hole and the second clamp base. The hole movably connects the first jib and the second jib to the clamp base;

The long arm includes a first long arm and a second long arm. The first long arm is provided with a set of third through holes, the second long arm is provided with a set of fourth through holes, and the push-pull rod is provided with a push-pull rod through-hole. The tie rod is provided with a second pin, and the second pin passes through the third through hole, the push through rod through hole and the fourth through hole to movably connect a group of long arms to the push and pull rod.

In the present invention, a cable hole is provided in the middle of the first pin, and a cable connected to the end of the push rod is connected to the handle through the cable hole in the middle of the first pin.

In the present invention, the push-pull rod includes a pliers body connection portion and a cable connection portion. The pliers body connection portion is a ring structure. The push-pull rod through hole is provided in the middle of the ring structure. The cable connection portion is connected to the cable. .

In the present invention, the outer ring of the cable is provided with a flexible outer tube, the outer ring of the flexible outer tube is provided with a positioning outer tube, and the handle is disposed at the rear end of the positioning outer tube.

In the present invention, a barb is provided on the inner side of the long arm to increase the clamping firmness.

In the present invention, the outer surface of the long arm is provided with a set of equally spaced scale division lines, which can measure the size of the lesion position under an endoscope.

In the present invention, a recess capable of accommodating the short arm is provided on the outer side of the long arm; the recess extends from the middle of the long arm to a position where the long arm and the push-pull rod are movably connected.

In the present invention, the outer side of the long arm from the middle to the distal end is a circular arc structure; the outer side of the short arm is also a circular arc structure; the arc radius of the outer arc structure of the long arm and the short arm is equal, They are all less than or equal to the inner wall radius of the outer tube.

In the present invention, the middle portion of the long arm is provided with a hinge hole perpendicular to the long arm; the distal end of the short arm is provided with a movable shaft perpendicular to the short arm; and the movable shaft is provided at the hinge Inside the hole so that the short arm is movably connected to the long arm.

In the present invention, the hinge hole is a T-shaped hole structure recessed toward the inside of the long arm; and the movable shaft is a T-shaped coupling shaft structure protruding toward the inside of the short arm.

Beneficial effect: The device can quickly and effectively close most large digestive tract wounds, turning them into smaller wounds that can be clamped by ordinary hemostatic clips, and fast and effective suture the wounds with existing hemostatic clips.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages of the above or other aspects of the present invention will become more clear.

Figure 1 is a schematic diagram of an explosion;

Figure 2 is an exploded view of a portion of the forceps;

3 is a schematic structural diagram of a push-pull rod;

Figure 4a is a schematic view of opening the forceps body;

Figure 4b is a sectional view of the connection of the long arm and the short arm;

FIG. 5 is a schematic diagram of closing the forceps body;

Figure 6a is a first schematic view showing the state of a forceps body as a scale;

6b is a second schematic view showing the state of the forceps body as a scale;

Fig. 6c is a third schematic view showing the state of the forceps body as a scale.

detailed description

The present invention will be described in detail below with reference to the drawings.

Example:

As shown in FIG. 1, a tissue forceps for digestive tract provided in this embodiment includes a long arm 1, a short arm 2, a first pin 3, a second pin 4, a push-pull rod 5, a forceps holder 6, a flexible outer tube 7, and Cable 8, positioning outer tube 9 and handle 10, a group of short arms are movably connected to the clamp base, a group of long arms are movably connected to the push-pull rod, and the ends of the short arms are fixedly connected to the outer side wall of the middle of the long arm. The push rod is connected to the cable.

As shown in FIG. 2, specifically, a group of long arms 1 is a clamp arm, and a group of short arms 2 is a control arm. One end of the group of short arms 2 is movably connected to the clamp base, and the other end is connected to the middle of the long arm 1. A set of long arms 1 is movably connected to one end of the push-pull rod 5, and the other end of the push-pull rod 5 is connected to a cable 8.

The short arm 2 includes a first short arm 2a and a second short arm 2b. The first short arm 2a is provided with a set of first through holes 11a, the second short arm 2b is provided with a set of second through holes 11b, and the clamp base 6 The end is provided with a first jaw base through hole 6a and a second jaw base through hole 6b, respectively. The jaw base includes a first pin 3, and the first pin 3 passes through the first jaw base through hole 6a, the first through hole 11a, and the second The through hole 11b and the second forceps through hole 6b movably connect the first short arm 2a and the second short arm 2b to the forceps 6;

The long arm 1 includes a first long arm 1a and a second long arm 1b. The first long arm 1a is provided with a set of third through holes 12a, and the second long arm 1b is provided with a set of fourth through holes 12b. A push-pull rod through hole 5a is provided, and the push-pull rod is provided with a second pin 4, the second pin 4 passes through the third through-hole 12a, the push-pull rod through-hole 5a and the fourth through-hole 12b to movably connect a group of long arms 1 to Push the lever 5 on.

A cable hole 3a is provided in the middle of the first pin 3, and a cable 8 connected to the end of the push-pull rod 5 is connected to the handle 10 through the cable hole 3a in the middle of the first pin 3.

As shown in FIG. 3, the push-pull rod 5 includes a pliers connection portion 13 and a cable connection portion 14. The pliers connection portion 13 is a ring structure. The push-pull rod through hole 5 a is provided in the middle of the ring structure, and the cable connection portion 14. Connect to the cable 8. The cable 8 penetrates into the hole at the cable connection portion 14 of the push-pull rod 5 and is welded or riveted.

The outer ring of the cable 8 is provided with a flexible outer tube 7, the outer ring of the flexible outer tube 7 is provided with a positioning outer tube 9, and the handle 10 is disposed at the rear end of the positioning outer tube. The flexible outer tube 7 serves as a protective outer tube for the entire instrument, and can be used as a support for the entire product when the product is opened and closed.

Barbs are provided on the inside of the long arms.

Functional principle: The unique lever mechanical structure is used. The lever fulcrum of its long arm is changed in position relative to the center axis of the instrument. When the tissue forceps are open, the lever fulcrum of the long arm is farthest from the center axis of the instrument. At this time, the traction force used to close the tissue forceps can be effectively transmitted to the distal end of the long arm holding the tissue. With the progress of the clamping process, the lever fulcrum of the long arm is getting smaller and smaller from the center axis of the instrument. At this moment, the traction torque It becomes smaller, and the expansion force of the tissue on the distal end of the long arm does not change or becomes larger, so that it needs to give more traction to obtain the required closing force. To this end, the instrument adds a positioning outer tube for applying to the short arm. The tightening force to the center of the instrument assists in the process of clamping; the opening distance of the instrument can theoretically reach the sum of the lengths of the two long arms, that is, the angle between the two long arms can be opened up to 180 degrees, in cooperation with the long arm A barb on the inside of the tip closes the wound with the total length of the two long arms.

The longer the length of the long arm 1, the larger the wound that it can clamp. The distal end of the short arm 2 is connected to the middle part of the long arm 1. As the lever fulcrum of the long arm 1, push the proximal handle assembly push rod 5 to The two long arms 1 are opened. At this time, the lever fulcrum of the long arms 1 is farthest from the instrument's central axis, and a small force can be applied on the push-pull rod to start closing the jaws.

Figure 4a is a schematic view of opening the forceps body;

4b is a cross-sectional view of the connection between the long arm and the short arm; the hinge hole 17 on the long arm 1 and the short arm 2 is movably connected to the inner diameter and the outer diameter of the movable shaft 16.

Figures 6a, 6b, and 6c are schematic diagrams of the state of the forceps as a scale. From left to right, the top view, front view, and the style viewed under the endoscope when the forceps are opened to 180 °, respectively.

An example shows that the forceps body is opened to 180 °, which is the longest state of the straight state of the forceps body. At this time, the maximum value in the plan view is 27mm. The dividing line 15 divides the forceps body 9 into 3mm intervals. Under the endoscope, we can use this equal distance. To measure the size and location of lesions during endoscopy or surgery, so as to provide good reference data for the next operation.

Here, the maximum value max of the pliers head is not limited to the above 27mm, and can be a value that can be achieved in the technical range. The dividing line 15 can be any numerical value, and the distance is not limited to 9 equal parts.

Installation steps: install the two short arms 2 holes into the pliers base 6 and connect the three pieces with the first pin 3; install the push rod 5 holes into the two long arms 1 and connect with the second pin 4 Insert the distal bending parts of the two short arms 2 into the middle holes of the two long arms 1, respectively. In this embodiment, they are connected by hinges; then, the push rod 5 is connected to the cable 8, and the cable is equipped with a flexible outer tube. 7. The flexible outer tube 7 is externally mounted with a positioning outer tube 9. Finally, the handle assembly is connected with the cable 8 and the flexible outer tube 7. At this time, a digestive tract tissue forceps are assembled.

Operation process: After normal ESD gastric surgery, the wound is large and the wound needs to be closed. First, the routine advancement of the microscope is performed. The assistant extends the left thumb, index finger and middle finger into the three holes of the handle, and the doctor passes the distal end of the instrument. One of the larger channels of the endoscopic double-clamp channel mirror is sent to the wound to clamp the appropriate part of the wound so that the large wound becomes two small wounds. In order to effectively close the wound, the assistant uses his right hand to Position the outer tube 9 at the proximal end to lock the forceps head forward, referring to the state of Fig. 5; at the same time, the smaller wounds are sutured one by one through the conventional hemostatic clip under the other jaw of the endoscope until the wounds are all sutured and exited. Tissue forceps.

In order to make the operation more convenient, you can first hit a hemostatic clip on each side of the tissue clamp clamping position, and then withdraw the tissue clamp before performing conventional wound closure surgery.

In order to better clamp the tissue, a corresponding barb is added to the long arm 1.

In order to effectively close the wound, the tissue forceps are added with a positioning outer tube 9 to assist the wound closing process and the fixed wound does not slip easily from the instrument after the wound is closed.

In order to have better flexibility, a recess is provided on the outer side of the long arm 1 to accommodate the short arm 2; the recess extends from the middle of the long arm 1 to the long arm 1 and the push-pull rod 5 Activity connection. In practical applications, the depression on the outer side of the long arm 1 can accommodate the short arm 2 after the entire tissue clamp is tightened, so that the outer side of the short arm 2 does not protrude from the outer side of the long arm. The smooth entry into the outer tube 9 makes the tissue forceps less resistant and more flexible during the proximal movement. Similarly, when the cable 8 is pushed to the distal end, the long arm 1 and the short arm 2 can also be flexibly moved in the outer tube 9.

It should be noted that, in order to realize that the long arm 1 can accommodate the short arm 2 after the tissue forceps are tightened, the long arm 1 can also be provided with other structures having the same effect as the depression, for example, the long arm 1 is from the middle The movable connection between the long arm 1 and the push-pull rod 5 may be a two-arm structure, that is, a through-groove structure is provided at the proximal end of the long arm 1, and when the long arm 1 is tightened, the short arm 2 can enter the through groove.

Further, the outer side of the long arm 1 from the middle to the distal end is a circular arc structure; the outer side of the short arm 2 is also a circular arc structure; the arc of the outer arc structure of the long arm 1 and the short arm 2 The radii are equal and both are less than or equal to the inner wall radius of the outer tube 9. Since the outer tube 9 is a tubular structure, the outer sides of the long arm 1 and the short arm 2 are simultaneously set into a circular arc structure, so that the movable parts of the tissue forceps can be cylindrical as a whole. This can not only ensure flexible sliding, but also in the process of driving the two long arms 1 to open, the outer tube 9 can give the outside of the short arm 2 a supporting force in the direction of the center of the circle, this supporting force is convenient to maintain the opening and closing of the long arm 1 Angle to facilitate control of the long arm 1.

To further adapt to the recessed structure, in the present invention, the middle portion of the long arm 1 is provided with a hinge hole 17 perpendicular to the long arm 1; the distal end of the short arm 2 is provided with a movement perpendicular to the short arm 2 A shaft 16; the movable shaft 16 is disposed in the hinge hole 17, so that the short arm 2 is movably connected to the long arm 1.

In practical applications, the hinge hole 17 is a T-shaped hole structure recessed toward the inside of the long arm 1; the movable shaft 16 is a T-shaped coupling shaft structure protruding toward the inside of the short arm 2. With the T-shaped hole structure recessed inward and the T-shaped coupling structure protruding inside, the movable shaft 16 can be rotated in the hinge hole 17 as far as possible so that the movable part does not exceed the arc of the outside of the long arm 1 Edge, thereby reducing the bulges that may be formed by each component, increasing the smoothness of the overall movement.

The present invention provides a tissue forceps for the digestive tract. There are many methods and ways to achieve this technical solution. The above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, Without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention. Each component that is not specified in this embodiment can be implemented by using existing technologies.

Claims (12)

A tissue forceps for digestive tract, which is characterized by comprising a handle (10) and a forceps body, the forceps body comprises an openable and retractable forceps arm and a control arm for controlling the opening and closing angle of the forceps arm, and a pull is provided in the handle. Cable (8), the handle cooperates with the control clamp arm to open and close through a cable and a control arm (2). The tissue forceps for digestive tract according to claim 1, wherein the forceps arms are a set of long arms (1), the control arms are a set of short arms (2), and the short arms ( 2) One end is movably connected to the clamp base (6), the other end of the short arm (2) is connected to the middle of the long arm (1), and one end of the push-pull rod (5) is movably connected to one end of the long arm (1). The other end of the pull rod (5) is connected to the cable (8). The tissue forceps for digestive tract according to claim 2, wherein the short arm (2) comprises a first short arm (2a) and a second short arm (2b), and the first short arm (2a) A set of first through holes (11a) is provided on the second short arm (2b), and a set of second through holes (11b) is provided on the second short arm (2b). The first clamp hole (6a) is provided at each end of the clamp base (6). And a second jaw through hole (6b), the jaw includes a first pin (3), and the first pin (3) passes through the first jaw through hole (6a), the first through hole (11a), and the second through hole The hole (11b) and the second through hole (6b) of the second clamp base move the first short arm (2a) and the second short arm (2b) to the clamp base (6). The long arm (1) includes a first long arm (1a) and a second long arm (1b). The first long arm (1a) is provided with a set of third through holes (12a), and the second long arm (1b) is provided. There is a set of fourth through holes (12b). The push-pull rod (5) is provided with a push-pull rod through-hole (5a). The push-pull rod is provided with a second pin (4), and the second pin (4) passes through the third through-hole. (12a), the push-pull rod through hole (5a) and the fourth through-hole (12b) movably connect a group of long arms (1) to the push-pull rod (5). The tissue forceps for digestive tract according to claim 3, characterized in that a cable hole (3a) is provided in the middle of the first pin (3), and a cable (8) connected to the end of the push rod (5) A cable hole (3a) passing through the middle of the first pin (3) is connected to the handle (10). The tissue forceps for digestive tract according to claim 4, wherein the push-pull rod (5) comprises a forceps connection portion (13) and a cable connection portion (14), the forceps connection portion ( 13) is a ring structure, the push-pull rod through hole (5a) is provided in the middle of the ring structure, and the cable connecting portion (14) is connected to the cable (8). The tissue forceps for digestive tract according to claim 5, characterized in that the outer ring of the cable (8) is provided with a flexible outer tube (7), and the outer ring of the flexible outer tube is provided with a positioning outer tube (9) The handle (10) is arranged at the rear end of the positioning outer tube (9). The tissue forceps for the digestive tract according to claim 6, wherein a barb is provided on the inner side of the long arm. A tissue forceps for the digestive tract according to claim 6, characterized in that a set of equally spaced scale dividing lines (15) are provided on the outer surface of the long arm (1). The tissue forceps for the digestive tract according to claim 2, characterized in that a recess is provided on the outside of the long arm (1) to accommodate the short arm (2); (1) The middle part extends to the movable connection of the long arm (1) and the push-pull rod (5). The tissue forceps for digestive tract according to claim 9, characterized in that the outer side of the long arm (1) from the middle to the distal end is a circular arc structure; the outer side of the short arm (2) is also Arc-shaped structure; the arc radii of the outer arc structures of the long arm (1) and the short arm (2) are equal and both are less than or equal to the inner wall radius of the outer tube (9). The tissue forceps for digestive tract according to claim 9, characterized in that the middle part of the long arm (1) is provided with a hinge hole (17) perpendicular to the long arm (1); the short arm (2) a distal end is provided with a movable shaft (16) perpendicular to the short arm (2); the movable shaft (16) is arranged in the hinge hole (17) so that the short arm (2) ) Is movably connected to the long arm (1). The tissue forceps for digestive tract according to claim 11, characterized in that the hinged hole (17) is a T-shaped hole structure recessed to the inside of the long arm (1); the movable shaft (16) ) Is a T-shaped coupling structure protruding to the inside of the short arm (2).

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