Purse-string forceps

Abstract

The utility model discloses purse-string forceps, and relates to the technical field of surgical instruments. The pair of forceps specifically comprises a forceps head, a corrugated pipe, an air pushing structure and an air source, the forceps head is connected with the air pushing structure, the air pushing structure is used for pushing the forceps head to be closed, the air pushing structure is connected with one end of the corrugated pipe, the air source is connected with the air pushing structure through a ventilation pipeline, the ventilation pipeline is arranged in the corrugated pipe, and the air pushing structure is used for pushing the corrugated pipe to be closed. The forceps head is provided with a purse-string needle. The air pushing structure is adopted to push the forceps heads to be closed, when the forceps heads are opened and closed, the width of the air pushing structure cannot be increased, it can be ensured that the forceps heads and the air pushing structure can be used in the endoscopic surgery, and it can also be ensured that the forceps heads and the air pushing structure can be taken out after being used.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical instruments, and specifically provides a purse-string forceps. Background Art

[0002] In laparotomy, a purse-string forceps is a surgical tool that can be used to suture luminal tissue. The purse-string forceps head is provided with a purse-string needle. After the purse-string needle is inserted into the purse-string thread, the purse-string forceps head clamps the luminal tissue, and the purse-string thread can be sutured into the tissue, achieving the effect of suturing the luminal tissue. For example, in laparotomy, when suturing a broken intestine, it is only necessary to use the purse-string forceps to clamp the broken end of the intestine, and then clamp the purse-string forceps to close the broken intestine. The purse-string forceps are used in laparotomy, and the laparotomy needs to provide a large enough opening to allow the purse-string forceps to be inserted into the body.

[0003] However, laparoscopic surgery is a widely developed minimally invasive surgery, which mainly includes hysteroscopic surgery, laparoscopic surgery and hystero-laparoscopic surgery. Compared with traditional surgical operations, it causes less damage to tissues. When laparoscopic surgery requires suturing the vagina, the operation is very time-consuming, resulting in a long operation time. Since the opening of laparoscopic surgery is very small, the arms of the purse-string forceps need to be opened and closed to complete the suturing work. The arms of the purse-string forceps are wide, which makes the purse-string forceps unable to be used in laparoscopic surgery, and there is a problem that the luminal tissue of laparoscopic surgery cannot be quickly sutured. Utility Model Content

[0004] The utility model provides a purse-string forceps, which is used to solve the problem that the existing purse-string forceps cannot be used in laparoscopic surgery.

[0005] The technical solution of the utility model is as follows:

[0006] A purse-string forceps comprises a forceps head, a bellows, an air-pushing structure and an air source, wherein the forceps head is connected to the air-pushing structure, the air-pushing structure is used to push the forceps head to close, the air-pushing structure is connected to one end of the bellows, the air source is connected to the air-pushing structure via a ventilation pipe, the ventilation pipe is arranged in the bellows, and the forceps head is provided with a purse-string needle.

[0007] In this solution, the forceps head is provided with a purse-string needle, so the forceps head can be used to suture tissue. The closure of the forceps head is pushed by the air-pushing structure, so the closure of the forceps head does not require the forceps arm to be achieved. In the case of no forceps arm, the width of the forceps head can pass through the opening in the laparoscopic surgery. The air-pushing structure is connected to the bellows, and the forceps head and the air-pushing structure can be sent into the body through the laparoscope through the bellows, solving the problem that the existing purse-string forceps cannot be used in laparoscopic surgery.

[0008] The pneumatic push structure includes a shell, a push block and a cylinder. The push block is slidably arranged on the shell. The cylinder is connected to the shell and is used to push the push block. The pliers head is hinged to the shell. The pliers head is provided with two force-bearing surfaces. The push block is used to push the force-bearing surfaces to close the pliers head.

[0009] In this solution, the cylinder and the push block cooperate to push the pliers head to close. The purpose of setting the push block is to adapt to the shape of the pliers head and solve the problem that the cylinder is not convenient to be directly connected to the pliers head. Through the transition of the push block, it is easier to transfer the thrust of the cylinder to the pliers head, so that the pliers head is closed. Two force-bearing surfaces are set on the pliers head, so that the push block can push the force-bearing surfaces, and the pliers head is pushed by pushing the force-bearing surfaces, so that the pliers head is closed. Setting the force-bearing surfaces can further enable the force of the push block to act accurately on the pliers head.

[0010] The push block is provided with two thrust surfaces, and the two force-bearing surfaces respectively abut against the two thrust surfaces.

[0011] In this solution, two thrust surfaces are provided to push the two force-bearing surfaces respectively, so that the forces on both sides of the clamp head are equal when the clamp head is closed, and the occlusal surface when the clamp head is closed is located in the middle when the clamp head is opened, which is convenient for the operator to judge the suturing position.

[0012] The housing is provided with a guide rail, and the push block is slidably connected to the guide rail.

[0013] In this solution, a guide rail is used to constrain the moving direction of the push block, thereby preventing the push block from changing direction due to the reaction force of the clamp head and preventing the push block from getting stuck after changing direction.

[0014] The bellows is provided with scales, and the scales are arranged along the axial direction of the bellows.

[0015] In this solution, setting the scale can more conveniently determine the folding position of the bellows, so that the doctor can accurately fold the bellows and adapt the angle of the forceps head to the position where suturing is required, thereby successfully adjusting the angle of the forceps head at one time and shortening the operation time.

[0016] The scale takes the end of the clamp head as the origin.

[0017] In this solution, the end of the clamp head is used as the scale origin, which makes it easier to determine the folding position.

[0018] The purse-string forceps also includes a reset structure, which is connected to the forceps head and is used to push the forceps head to open.

[0019] In this solution, a reset structure is provided to provide power for the forceps head to open. When the suturing is completed, the doctor disconnects the air supply from the gas source. When the cylinder loses the air supply from the gas source, the force of the reset structure will push the forceps head to open. At this time, the forceps head can compress the cylinder through the push block to shorten the cylinder and reopen the forceps head. The reset structure is provided to enable the forceps head to open automatically after the suturing is completed, so as to avoid the forceps head being taken out of the body in a closed state and causing strain to the sutured part.

[0020] The reset structure is a U-shaped spring sheet or a U-shaped spring rod, and the U-shaped spring sheet or the U-shaped spring rod is respectively connected to the two matching surfaces of the clamp head.

[0021] In this solution, the U-shaped spring sheet or the U-shaped spring rod can be installed on the two matching surfaces of the clamp head, which requires a small installation space and is easy to install.

[0022] The purse-string forceps also includes a handle, which is connected to the bellows. The handle and the air push structure are respectively arranged at two ends of the bellows.

[0023] In this solution, a handle is provided to facilitate gripping and prevent the doctor from directly gripping the bellows when using the purse-string forceps, thereby causing the bellows to deform.

[0024] The ventilation duct is provided with a valve, and the valve is connected to the handle.

[0025] In this solution, the valve can be arranged to more conveniently control the air supply state of the cylinder, thereby controlling the opening or closing of the forceps head. If the valve is arranged on the handle, the doctor can grasp the handle and operate the valve with one hand at the same time, and the doctor can perform other operations with the other hand.

[0026] Beneficial effects of the utility model:

[0027] The utility model adopts an air push structure to push the forceps head to close. When the forceps head is opened and closed, the width of the air push structure will not increase, which can ensure that the forceps head and the air push structure can be used in laparoscopic surgery and can also ensure that the forceps head and the air push structure can be taken out after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the present utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a structural schematic diagram of embodiment 1;

[0030] Figure 2It is a cross-sectional view of the thrust structure and the clamp head part of the first embodiment;

[0031] Figure 3 is a cross-sectional view of the thrust structure and the clamp head part of the first embodiment in another state;

[0032] Figure 4 It is a right side view of the housing of the first embodiment;

[0033] Figure 5 It is a cross-sectional view of the thrust structure and the clamp head part of the second embodiment;

[0034] Figure 6 is a cross-sectional view of the thrust structure and the clamp head part of the second embodiment in another state;

[0035] Figure 7 This is a schematic diagram of the structure of the third embodiment.

[0036] In the above drawings, the corresponding reference numerals are as follows:

[0037] 1. Clamp head; 2. Air push structure; 3. Bellows; 4. Scale; 5. Handle; 6. Annular pattern; 7. Reset structure; 11. Force-bearing surface; 21. Shell; 22. Push block; 23. Cylinder; 24. Guide rail; 25. Thrust surface; 26. Circular tubular structure. DETAILED DESCRIPTION

[0038] In conjunction with the accompanying drawings, the technical solution of the present utility model is clearly and completely explained through the specific implementation methods of the embodiments of the present utility model.

[0039] Embodiment 1.

[0040] like Figure 1 As shown, the first embodiment of the present invention provides a purse-string forceps, including a forceps head 1, a bellows 3, an air-pushing structure 2 and an air source, wherein the forceps head 1 is connected to the air-pushing structure 2, and the air-pushing structure 2 is connected to the bellows 3, and the air source is used to supply air to the air-pushing structure 2, thereby providing power to the air-pushing structure 2, thereby pushing the forceps head 1 to close. The air source is connected to the air-pushing structure 2 through a ventilation duct, and the ventilation duct can be arranged in the bellows 3, so as to avoid the ventilation duct from swinging at will and affecting the use. The forceps head 1 is provided with a purse-string needle, which can be used to suture tissue after the purse-string needle is threaded with a purse-string thread.

[0041] like Figure 2 As shown, the pneumatic push structure 2 includes a housing 21, a cylinder 23 and a push block 22, one end of the cylinder 23 is connected to the housing 21, and the other end of the cylinder 23 is connected to the push block 22. The pliers head 1 is hinged to the housing 21, and the push block 22 is against the pliers head 1, and the push block 22 is used to push the pliers head 1 to close.

[0042] like Figure 2 and Figure 3 As shown, the pliers head 1 is provided with two force-bearing surfaces 11, and the push block 22 is provided with two thrust surfaces 25 corresponding to the force-bearing surfaces 11, and the thrust surfaces 25 overlap with the force-bearing surfaces 11. The force-bearing surfaces 11 are inclined relative to the sliding direction of the push block 22, and the two thrust surfaces 25 are located between the two force-bearing surfaces 11. When the thrust surfaces 25 move toward the pliers head 1, the two thrust surfaces 25 respectively give the two force-bearing surfaces 11 an inclined outward force, so that the distance between the two force-bearing surfaces 11 gradually increases. The pliers head 1 is hingedly connected to the housing 21, and when the two force-bearing surfaces 11 are respectively subjected to the force from the thrust surfaces 25, the pliers head 1 will gradually close.

[0043] It is understandable that the pliers head 1 can be divided into two jaws, the two jaws are respectively hinged to the housing 21, the two jaws can rotate around the hinge point independently, and the two force-bearing surfaces 11 are respectively arranged on the two jaws. The side of the jaws provided with the purse-string needle is the matching surface, and when the pliers head 1 is in a closed state, the matching surfaces of the two jaws coincide. The force-bearing surface 11 and the purse-string needle are respectively located on both sides of the hinge point, so when the two force-bearing surfaces 11 are respectively acted upon by the thrust surface 25, the distance between the two force-bearing surfaces 11 increases, and the matching surfaces of the two jaws approach each other until the pliers head 1 is closed.

[0044] The thrust surface 25 and the force-bearing surface 11 are parallel to each other, which can increase the contact area and improve the stability of the action between the push block 22 and the pliers head 1. The angle between the force-bearing surface 11 and the sliding direction of the push block 22 can be 40°-60°, preferably 45°. The larger the angle between the force-bearing surface 11 and the sliding direction of the push block 22, the larger the spacing of the force-bearing surface 11 moving to both sides when the push block 22 slides the same distance, the larger the closing angle of the pliers head 1, and the faster the pliers head 1 closes. At the same time, the larger the angle between the force-bearing surface 11 and the sliding direction of the push block 22, the greater the resistance encountered by the push block 22. Therefore, the selection of an angle of 45° can balance the resistance encountered by the push block 22 and the closing speed of the pliers head 1.

[0045] The thrust surface 25 is parallel to the force-bearing surface 11 , and the thrust block 22 may be a block structure with an isosceles trapezoid or an isosceles triangle in cross section. The thrust block may also be other block structures including two thrust surfaces 25 .

[0046] The push block 22 and the cylinder 23 may be connected by welding or by bonding.

[0047] The housing 21 is provided with a guide rail 24, and the push block 22 is provided with a slide groove adapted to the guide rail 24, and the slide groove is slidably connected to the guide rail 24. The push block 22 can slide along the direction of the guide rail 24.

[0048] like Figure 4As shown, the overall shape of the shell 21 is a cuboid, the interior of the shell 21 is hollow, and a circular tubular structure 26 is provided at one end of the shell 21, and the circular tubular structure 26 is used to connect with the bellows 3. The shell 21 and the bellows 3 can be connected by bonding, welding or clamping.

[0049] The ventilation pipeline is provided with a valve.

[0050] The valve is a reversing valve. When the ventilation direction of the reversing valve is such that the air source pushes the cylinder 23 to extend, the forceps head 1 is closed. When the ventilation direction of the reversing valve is such that the air source pushes the cylinder 23 to shorten, the forceps head 1 is opened. After the forceps head 1 is closed to complete the suturing of the tissue, the ventilation direction of the reversing valve is switched again, and the cylinder 23 shortens. At this time, the forceps head 1 loses the thrust of the push block 22 and cannot maintain the state of clamping the tissue. The forceps head 1 can be opened by a device such as tweezers, and then the forceps head 1 can be taken out.

[0051] One end of the bellows 3 is connected to the air push structure 2, and the other end of the bellows 3 is provided with a handle 5, and the handle 5 adopts a hollow tubular structure so that the ventilation pipe can pass through the handle 5. The valve is arranged on the handle 5, and the valve is located at one end of the handle 5 close to the bellows 3. When the doctor holds the handle 5, the valve can be operated by the thumb, which is convenient for the doctor to operate.

[0052] Embodiment 2.

[0053] The second embodiment provides a purse-string forceps. Different from the first embodiment, the second embodiment further includes a reset structure 7, and the reset structure 7 is used to push the forceps head 1 to open.

[0054] like Figure 5 and Figure 6 As shown, the reset structure 7 is a U-shaped spring sheet or a U-shaped spring rod, which is arranged between the two jaws of the pliers head 1, and the two ends of the U-shaped spring sheet or the U-shaped spring rod are respectively connected to the matching surfaces of the two jaws. When the pliers head 1 is closed, the U-shaped spring sheet or the U-shaped spring rod will be compressed, and when the air push structure 2 is disconnected from the air source, the cylinder 23 in the air push structure 2 loses the air source supply, and the U-shaped spring sheet or the U-shaped spring rod can overcome the resistance of the cylinder 23 to push the pliers head 1 to open.

[0055] In this embodiment, the valve may be a stop valve. The valve is used to control the connection and disconnection of the ventilation duct, thereby controlling the connection state between the air source and the air push structure 2. When the valve is in the connected state, the air source is connected to the air push structure 2, and the air source supplies air to the air push structure 2, so that the air push structure 2 can push the pliers head 1 to close. When the valve is closed, the air source is disconnected from the air push structure 2, and the reset structure 7 overcomes the resistance of the air push structure 2, so that the pliers head 1 is opened under the action of the reset structure 7, which facilitates the removal of the pliers head 1.

[0056] Embodiment 3,

[0057] The third embodiment provides a purse-string forceps, which is different from the first embodiment in that an annular pattern 6 is provided at the position of the scale 4 of the third embodiment.

[0058] like Figure 7 As shown, any scale 4 is provided with an annular pattern 6 along the circumferential direction of the bellows 3, the position of the annular pattern 6 corresponds to the scale 4, and the spacing of the annular patterns 6 is the same. Therefore, the bending position of the bellows 3 can be determined by the annular pattern 6.

[0059] Since the scale 4 can only be set on one side of the bellows 3, the annular pattern 6 can facilitate the staff to judge the bending position of the bellows 3 from the other side, solving the problem that the scale 4 cannot be observed at other positions of the bellows 3 and the scale 4 has a blind spot.

[0060] For example, the spacing between the annular patterns 6 may be 5 mm or 1 cm.

Claims

1. A purse-string forceps, characterized in that: The invention comprises a clamp head (1), a bellows (3), an air push structure (2) and an air source, wherein the clamp head (1) is connected to the air push structure (2), the air push structure (2) is used to push the clamp head (1) to close, the air push structure (2) is connected to one end of the bellows (3), the air source is connected to the air push structure (2) via a ventilation pipe, the ventilation pipe is arranged in the bellows (3), and the clamp head (1) is provided with a purse-string needle.

2. A purse-string clamp according to claim 1, characterized in that: The pneumatic push structure (2) comprises a shell (21), a push block (22) and a cylinder (23); the push block (22) is slidably arranged on the shell (21); the cylinder (23) is connected to the shell (21); the cylinder (23) is used to push the push block (22); the pliers head (1) is hinged to the shell (21); the pliers head (1) is provided with two force-bearing surfaces (11); the push block (22) is used to push the force-bearing surfaces (11) to close the pliers head (1).

3. A purse-string clamp according to claim 2, characterized in that: The push block (22) is provided with two thrust surfaces (25), and the two force-bearing surfaces (11) respectively abut against the two thrust surfaces (25).

4. A purse-string clamp according to claim 2, characterized in that: The housing (21) is provided with a guide rail (24), and the push block (22) is slidably connected to the guide rail (24).

5. A purse-string clamp according to claim 1, characterized in that: The bellows (3) is provided with a scale (4), and the scale (4) is arranged along the axial direction of the bellows (3).

6. A purse-string clamp according to claim 5, characterized in that: The scale (4) takes the end of the clamp head (1) as the origin.

7. A purse-string clamp according to claim 2, characterized in that: It also comprises a reset structure (7), wherein the reset structure (7) is connected to the clamp head (1), and the reset structure (7) is used to push the clamp head (1) to open.

8. A purse-string clamp according to claim 7, characterized in that: The reset structure (7) is a U-shaped spring sheet or a U-shaped spring rod, and the U-shaped spring sheet or the U-shaped spring rod are respectively connected to the two matching surfaces of the clamp head (1).

9. A purse-string clamp according to claim 1, characterized in that: It also comprises a handle (5), the handle (5) being connected to the bellows (3), and the handle (5) and the air push structure (2) being respectively arranged at two ends of the bellows (3).

10. A purse-string clamp according to claim 9, characterized in that: The ventilation duct is provided with a valve, and the valve is connected to the handle (5).

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