A clamp applicator

Abstract

The present invention provides a clamp, which belongs to the technical field of medical devices, and includes a clamp head, a ligation clamp and a handle assembly, wherein the ligation clamp is installed in the clamp head, and the handle assembly is connected to the clamp head to drive the clamp head to open and close; the clamp head includes an upper clamp head and a lower clamp head, and a jaw is formed between the upper clamp head and the lower clamp head for installing the ligation clamp, and the upper clamp head and the lower clamp head form a clamping connection for the ligation clamp; a ligation clamp auxiliary rebound mechanism is also provided in the jaw; the ligation clamp auxiliary rebound mechanism is an arc-shaped spring sheet vertically installed in the jaw, and the natural opening and closing angles of the upper and lower ends of the spring sheet are not greater than the maximum natural opening and closing angle of the ligation clamp. The clamp of the present invention can ensure the rapid and accurate opening and closing of the ligation clamp during in vivo surgery, avoid the situation that the doctor needs to further finely control the clamp due to insufficient rebound force of the ligation clamp, thereby increasing the operation time and fatigue of the operation, and has high comfort in use.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a clip applier used in conjunction with a ligation clip in surgical operations, especially laparoscopic operations. Background Art

[0002] In surgical operations, laparoscopic surgery is a newly developed minimally invasive method. It has the advantages of small incision, less pain, and fast recovery. It is very popular among patients and has become an inevitable trend in the development of modern surgical operations. During the operation, it is often necessary to perform ligation operations on blood vessels or other tubular tissues, such as bile ducts. Ligation clips are currently widely used in laparoscopic surgery, and clip appliers are essential tools for applying ligation clips. In laparoscopic surgery, the ligation clip is first clamped with a clip applier, and then the clip applier is inserted into the surgical site where the ligation operation needs to be performed through the endoscopic catheter or directly through the surgical incision, and then the ligation clip is manipulated by the clip applier to ligate and seal the tubular tissue.

[0003] As we all know, during surgery, time is of the essence. Current medical devices are all aimed at saving doctors' surgical time and reducing doctors' fatigue. During laparoscopic surgery, when the clip applicator enters the surgical site in the patient's body, it is necessary to pull the clip applicator trigger to half the stroke so that the jaws are in a semi-closed state. The purpose is to make the outer diameter of the jaws smaller than the outer tube shell diameter. After reaching the surgical site, the doctor needs to slightly loosen the clip applicator trigger to open the jaws, and the ligation clip in the jaw position will open due to its rebound force, so that the ligation clip is aligned with the tubular tissue to be ligated. However, in actual operation, the ligation clip often has insufficient rebound force and cannot rebound to a suitable opening angle, so that the tubular tissue cannot be clamped and ligated, resulting in the doctor needing to further finely control the direction and strength of the clip applicator trigger to adjust the ligation clip to a suitable opening angle, which prolongs the operation time and increases the doctor's surgical fatigue.

[0004] At the same time, when the doctor uses the clamp to ligate tubular tissues such as blood vessels, after adjusting the ligation angle, he will hold the movable handle of the clamp tightly and pull the movable trigger to close the handle and the movable trigger to the appropriate position, so that the ligation clamp completes the ligation. In the process of pulling the movable trigger, the movable handle is pressed against the inner side of the doctor's half-clenched palm, that is, the inner side of the palm provides a force point for pulling the movable trigger. The movable handle of the existing clamp is often in the shape of a thin strip. In actual use, firstly, the thin strip handle has a small contact surface with the inner side of the palm, which causes the handle to be easily displaced on the inner side of the palm, that is, the doctor's grip on the clamp is unstable during the clamping process, affecting the accuracy of clamping; secondly, the thin strip handle has a relatively concentrated pressure on the palm. When the doctor operates the clamp for a long time, the muscles on the inner side of the palm are easily fatigued and tender due to the concentrated pressure, which is not conducive to improving the comfort of the doctor's surgery. Summary of the invention

[0005] The object of the present invention is to provide a clip applier which, through a reasonable and effective ligation clip auxiliary rebound mechanism and a handle assembly design, enhances the safety and convenience of the clip applier during surgery and improves the comfort during use.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A clamping forceps comprises a clamp head, a ligation clamp and a handle assembly, wherein the ligation clamp is installed in the clamp head, and the handle assembly is connected to the clamp head to drive the clamp head to open and close; the clamp head comprises an upper clamp head and a lower clamp head, a jaw is formed between the upper clamp head and the lower clamp head for installing the ligation clamp, and the upper clamp head and the lower clamp head form a clamping connection for the ligation clamp; a ligation clamp auxiliary rebound mechanism is also provided in the jaw.

[0008] As a preferred technical solution of the present invention, the auxiliary rebound mechanism of the ligation clamp is an arc-shaped spring sheet vertically installed in the jaws, and the two ends of the spring sheet are respectively detachably fixedly connected to the inner side of the upper clamp head and the inner side of the lower clamp head; the spring sheet is located behind the ligation clamp, and the flexible hinge part of the ligation clamp is always in contact with the middle part of the spring sheet;

[0009] The natural opening and closing angles of the upper and lower ends of the spring sheet are not greater than the natural opening and closing angles of the ligation clip.

[0010] As a preferred technical solution of the present invention, the natural opening and closing angles of the upper and lower ends of the spring sheet are 55° to 60°, and the natural opening and closing angle of the ligation clip is 60° to 65°.

[0011] As a preferred technical solution of the present invention, the natural opening and closing angles of the upper and lower ends of the spring sheet are consistent with the natural opening and closing angles of the ligation clip.

[0012] As a preferred technical solution of the present invention, the handle assembly includes a movable trigger, a fixed handle, a clamp rod and a rotation control mechanism, the movable trigger is rotatably connected to the fixed handle, and the rotation control mechanism is arranged on one end of the clamp rod close to the movable trigger; a handle support pad is arranged on the outer side of the fixed handle.

[0013] As a preferred technical solution of the present invention, the handle support pad is an arc-shaped piece as a whole, fixedly fitted with the arc curve on the outer side of the fixed handle; concave curves are also provided at the four corners of the handle support pad.

[0014] As a preferred technical solution of the present invention, the inner side of the movable trigger and the outer side of the handle pad are coated with an antibacterial and anti-slip silicone layer.

[0015] As a preferred technical solution of the present invention, the ligation clamp is V-shaped, including a first clamp arm, a second clamp arm and a flexible hinge connecting the first clamp arm and the second clamp arm, a locking hook is provided at the end of the first clamp arm, and a lock body is provided at the end of the second clamp arm, the locking hook corresponds to the lock body, and the lock body can be snap-connected and fixed in the locking hook.

[0016] As a preferred technical solution of the present invention, the inner sides of the first clamp arm and the second clamp arm are provided with anti-slip teeth that match each other.

[0017] As a preferred technical solution of the present invention, the anti-slip teeth are three-dimensional concave-convex anti-slip teeth, which can prevent the ligation clamp from sliding in any direction.

[0018] As a preferred technical solution of the present invention,

[0019] A first positioning hole is provided at the front inner side of the upper clamp head, and the first clamp arm is provided with a first positioning block corresponding to the first positioning hole; a second positioning hole is provided at the front inner side of the lower clamp head, and the second clamp arm is provided with a second positioning block corresponding to the second positioning hole; the clamp head clamps the first positioning block through the first positioning hole, and the second positioning hole clamps the second positioning block to clamp and fix the ligation clamp.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. The clip applicator of the present invention is provided with a ligation clip auxiliary rebound mechanism. During laparoscopic surgery, the doctor first installs the ligation clip in the clamp head, and then operates the handle assembly, that is, lightly presses and pulls the active trigger of the clip applicator to half the stroke so that the jaws are in a semi-closed state, and after pushing the clip applicator into the surgical site in the patient's body, releases the active trigger of the clip applicator to relieve the pressure on the clamp head from the handle assembly. At this time, the arc-shaped spring sheet in the jaws rebounds to a natural state, that is, the natural opening and closing angle rebounds to a maximum value under a pressure-free state. During this process, if the flexible hinge of the ligation clip works normally, the ligation clip will also actively rebound to the maximum opening and closing angle. If the flexible hinge of the ligation clip fails, that is, its own rebound force is insufficient, it will be forced to rebound under the drive of the ligation clip auxiliary rebound mechanism, that is, the arc-shaped spring sheet, and finally rebound to the maximum opening and closing angle, so that the ligation clip can clamp and ligate the tubular tissue. It can be seen that the present invention can ensure the rapid and accurate opening and closing of the ligation clip during in vivo surgery, avoiding the situation where the doctor needs to further finely control the clamp due to insufficient rebound force of the ligation clip, thereby increasing the operation time and fatigue.

[0022] 2. During the use of the ligation clamp, the flexible hinge part of the ligation clamp always abuts against the middle part of the spring sheet. During the clamping stage, the flexible hinge part of the ligation clamp gives a force to the spring sheet, which helps the spring sheet to overcome the initial elastic force and is more likely to deform under the force applied by the force applying forceps. At the same time, the spring sheet also gives the ligation clamp a reaction force, providing a fulcrum-like effect, which is conducive to stabilizing the flexible hinge part of the ligation clamp. During the closing process of the ligation clamp, the flexible hinge part gradually moves backward with the middle part of the spring sheet, giving the doctor hand feedback during the operation and facilitating the control of the strength; finally, after the operation is completed, in the process of releasing the ligation clamp, the spring sheet gives the flexible hinge part of the ligation clamp a thrust, which can assist in quickly releasing the ligation clamp and resetting the force applying forceps.

[0023] 3. The clip applier of the present invention is provided with a handle support pad at the fixed handle, which ensures the temperature of the clip applier gripped by the doctor during use and also improves the doctor's comfort during use.

[0024] 4. The first clamp arm and the second clamp arm of the ligation clamp of the present invention are provided with three-dimensional concave-convex anti-slip teeth matching each other on the inner side, which can prevent the ligation clamp from sliding in any direction, and help doctors to seal various tubular tissues safely and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 for Figure 1 Schematic diagram of the left side plan view of the middle handle support pad.

[0028] Figure 3 It is a schematic diagram of the assembly structure of the forceps head and the ligation clip of the present invention.

[0029] Figure 4 for Figure 3 Schematic cross-sectional view of .

[0030] Figure 5 It is a schematic diagram of an embodiment of the ligation clip structure of the present invention.

[0031] Figure 6 It is a schematic diagram of another embodiment of the ligation clip structure of the present invention.

[0032] Figure 7 It is a schematic diagram of the clamp head structure of the present invention.

[0033] Reference numerals:

[0034] 1. Clamp head, 11-upper clamp head, 11a, first positioning hole, 12-lower clamp head, 12a, second positioning hole, 13-jaw, 14, clamping fixing hole;

[0035] 2. ligation clamp, 21. first clamp arm, 21a. second positioning block, 21b. lock hook, 22. second clamp arm, 22a. second positioning block, 22b. lock body, 23. flexible hinge;

[0036] 3. Handle assembly, 31-movable trigger, 32-fixed handle, 33-clamp rod, 34-rotation control mechanism, 35-handle pad, 36-antibacterial and anti-slip silicone layer;

[0037] 4. Spring sheet. DETAILED DESCRIPTION

[0038] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0039] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] See also Figure 1~Figure 4The present invention provides a clamping forceps, comprising a clamp head 1, a ligation clamp 2 and a handle assembly 3, wherein the ligation clamp 2 is installed in the clamp head 1, and the handle assembly 3 is connected to the clamp head 1 to drive the clamp head 1 to open and close; the clamp head 1 comprises an upper clamp head 11 and a lower clamp head 12, wherein a jaw 13 is formed between the upper clamp head 11 and the lower clamp head 12 for installing the ligation clamp 2, and the upper clamp head 11 and the lower clamp head 12 form a clamping connection for the ligation clamp 2; a ligation clamp auxiliary rebound mechanism is also provided in the jaw 13, and in this embodiment, the ligation clamp auxiliary rebound mechanism is an arc-shaped spring sheet 4 vertically installed in the jaw 13, and is made of spring steel. The spring sheet 4 is arranged behind the ligation clamp 2 and abuts against each other, and the natural opening and closing angles of the upper and lower ends of the spring sheet 4 are not greater than the maximum natural opening and closing angle of the ligation clamp 2.

[0043] The clip applier is mainly used for surgical operations, especially laparoscopic operations. When in use, the doctor first installs the ligation clip 2 in the clamp head 1, and then operates the handle assembly 3 to achieve the purpose of closing. Figure 1 In this embodiment, the handle assembly 3 includes an active trigger 31. When in use, the active trigger 31 of the clamp applicator can be lightly pressed to half the stroke so that the jaws 13 are in a semi-closed state, so that the ligation clamp 2 is subjected to inward pressure and is in a semi-compressed state. At this time, the opening angle between the two arms is about 30°, so that the outer diameter of the clamp head 1 becomes smaller. After the clamp head 1 is inserted into the surgical site in the patient's body through the endoscopic catheter or surgical incision, force is continued to be applied until the two clamp arms of the ligation clamp 2 are closed; after the operation is completed, the active trigger 31 of the clamp applicator is released to release the pressure from the handle assembly 3 on the clamp head 1. At this time, the arc-shaped spring sheet 4 in the jaws 13 rebounds, driving the upper clamp head 11 and the lower clamp head 12 to separate toward the upper and lower ends, thereby driving the ligation clamp 2 to rebound to the maximum natural opening and closing angle. In this embodiment, the natural opening and closing angles of the upper and lower ends of the spring sheet 4 are 60°, and the natural opening and closing angle of the ligation clip 2 is 65°, that is, the natural opening and closing angle of the ligation clip 2 is greater than the natural opening and closing angles of the upper and lower ends of the spring sheet 4, so that the spring sheet 4 has a certain restraining force on the ligation clip 2.

[0044] See also Figure 1~Figure 2 The present invention provides a clamping forceps, wherein the handle assembly 3 includes an active trigger 31, a fixed handle 32, a clamp rod 33 and a rotation control mechanism 34. The active trigger 31 is rotatably connected to the fixed handle 32. The rotation control mechanism 34 is arranged on one end of the clamp rod 33 close to the active trigger 31. The rotation operation of the clamp head 1 can be realized by the rotation control mechanism 34. The structure and working principle of the rotation control mechanism 34 are the prior art in this field and will not be described in detail in this embodiment. A handle support pad 35 is arranged on the outer side of the fixed handle 32. Figure 2As shown, the handle pad 35 is a curved arc piece as a whole, fixedly fitting with the outer arc curve of the fixed handle 32; the four corners of the handle pad 35 are also provided with concave curves. When the doctor uses it, the handle pad 35 is pressed against the inner side of the doctor's half-clenched palm to provide a force-bearing surface for the trigger 31 to be pulled. Since the handle pad 35 is a curved arc piece, the contact area with the inner side of the palm is greatly increased, making the doctor's grip on the clip more stable, and avoiding the concentrated pressure of the handle on the palm, improving the doctor's comfort. At the same time, in this embodiment, the inner side of the movable trigger 31 and the outer side of the handle pad 35 are coated with an antibacterial and anti-slip silicone layer 36, which can further improve the doctor's grip stability on the clip and ensure the accuracy of the clip operation.

[0045] See also Figure 5 An embodiment of a ligation clip provided by the present invention is that the ligation clip 2 is V-shaped, including a first clamp arm 21, a second clamp arm 22 and a flexible hinge 23 connecting the first clamp arm 21 and the second clamp arm 22, a locking hook 21b is provided at the end of the first clamp arm 21, and a locking body 22b is provided at the end of the second clamp arm 22, the locking hook 21b corresponds to the locking body 22b, and the locking body 22b can be snap-fitted and fixed in the locking hook 21b, so that the ligation clip 2 can close and ligate tubular tissues such as blood vessels.

[0046] Correspondingly, a first positioning hole 11a is provided at the inner front end of the upper clamp head 11, and a second positioning hole 12a is provided at the inner front end of the lower clamp head 12; a first positioning block 21a corresponding to the first positioning hole 11a is provided on the outer side of the first clamp arm 21, and a second positioning block 22a corresponding to the second positioning hole 12a is provided on the outer side of the second clamp arm 22; the clamp head 1 clamps the first positioning block 21a through the first positioning hole 11a and the second positioning block 22a through the second positioning hole 12a to clamp and position the ligation clip 2.

[0047] See also Figure 6 The present invention provides another embodiment schematic diagram of a ligation clip. The ligation clip 2 and Figure 5 The difference is that the first positioning block 21a and the second positioning block 22a of the ligation clamp are respectively arranged on the front and rear sides of the first clamp arm 21 and the second clamp arm 22. Figure 5 The first positioning block 21 a and the second positioning block 22 a of the ligation clamp 2 in the embodiment shown in FIG. 2 are arranged on the outer sides of the first clamp arm 21 and the second clamp arm 22 .

[0048] Accordingly, based on Figure 6 The ligation clamp 2 shown in the figure has a change in the positions of the first positioning hole 11a of the upper clamp head 11 and the second positioning hole 12a of the lower clamp head 12. That is, it can be a single structure or a combined structure as follows.

[0049] When the ligation clip 2 is Figure 5 In the structure shown in , the first positioning block 21a and the second positioning block 22a of the ligation clamp 2 are arranged on the outside of the first clamp arm 21 and the second clamp arm 22; at this time, the first positioning hole 11a of the upper clamp head 11 and the second positioning hole 12a of the lower clamp head 12 are respectively located on the inner sides of the upper clamp head 11 and the lower clamp head 12; see Figure 4 and Figure 7 structure.

[0050] When the ligation clip 2 is Figure 6 In the structure shown in FIG. 1 , the first positioning block 21a and the second positioning block 21a of the ligation clip 2 are

[0051] The blocks 22a are respectively arranged at the front and rear sides of the first clamp arm 21 and the second clamp arm 22; at this time, the first positioning hole 11a of the upper clamp head 11 and the second positioning hole 12a of the lower clamp head 12 are respectively located at the front and rear sides of the upper clamp head 11 and the lower clamp head 12; see Figure 3 The structure shown.

[0052] In one embodiment, the arc-shaped spring piece 4 is bent into an arc shape toward the pliers head, such as Figure 4 and Figure 7 In other embodiments, the arc-shaped spring sheet 4 may also be bent in an arc shape toward the handle assembly 3. The two ends of the arc-shaped spring sheet 4 are detachably fixedly connected to the inner side of the upper clamp head 11 and the inner side of the lower clamp head 12; specifically, the inner side of the upper clamp head 11 is located behind the upper positioning hole 11a, and the inner side of the lower clamp head 12 is located behind the lower positioning hole 12a. Spring sheet clamping fixing holes are respectively provided.

[0053] It can be seen from the above structure that during the use of the ligation clamp, the flexible hinge part of the ligation clamp is always in contact with the middle part of the spring sheet. During the clamping stage, the flexible hinge part of the ligation clamp gives a force to the spring sheet, which is conducive to the spring sheet overcoming the initial elastic force and is more likely to deform under the force applied by the clamp. At the same time, the spring sheet also gives the ligation clamp a reaction force, providing a fulcrum-like effect, which is conducive to stabilizing the flexible hinge part of the ligation clamp. During the closing process of the ligation clamp, the flexible hinge part gradually moves backward with the middle part of the spring sheet, giving the doctor hand feedback during the operation, making it easier to control the strength; finally, after the operation is completed, in the process of releasing the ligation clamp, the spring sheet gives the flexible hinge part of the ligation clamp a thrust, which can assist in quickly releasing the ligation clamp and resetting the applying clamp.

[0054] The above embodiments describe multiple specific implementations of the present invention, but those skilled in the art should understand that various changes or modifications may be made to these implementations without departing from the principles and essence of the present invention, but these changes and modifications are all within the scope of protection of the present invention.

Claims

1. A clip applier, characterized in that: The invention comprises a clamp head, a ligation clamp and a handle assembly, wherein the ligation clamp is installed in the clamp head, and the handle assembly is connected to the clamp head to drive the clamp head to open and close; the clamp head comprises an upper clamp head and a lower clamp head, and a jaw is formed between the upper clamp head and the lower clamp head for installing the ligation clamp, and the upper clamp head and the lower clamp head form a clamping connection for the ligation clamp; a ligation clamp auxiliary rebound mechanism is also provided in the jaw; Wherein, the auxiliary rebound mechanism of the ligation clamp is an arc-shaped spring sheet vertically installed in the jaws, and the two ends of the spring sheet are detachably fixedly connected to the inner side of the upper clamp head and the inner side of the lower clamp head respectively; The spring sheet is located behind the ligation clip, and the flexible hinge portion of the ligation clip is always in contact with the middle portion of the spring sheet; The natural opening and closing angles of the upper and lower ends of the spring sheet are not greater than the natural opening and closing angles of the ligation clip; The spring leaf is made of spring steel.

2. The clip applier according to claim 1, wherein: The natural opening and closing angles of the upper and lower ends of the spring sheet are 55° to 60°, and the natural opening and closing angles of the ligation clip are 60° to 65°.

3. The clip applier according to claim 1, wherein: The handle assembly includes a movable trigger, a fixed handle, a clamp rod and a rotation control mechanism. The movable trigger is rotationally connected to the fixed handle. The rotation control mechanism is arranged on one end of the clamp rod close to the movable trigger. A handle support pad is arranged on the outer side of the fixed handle.

4. The clip applier according to claim 3, wherein: The handle support pad is an arc-shaped piece as a whole, and is fixedly fitted with the arc-shaped curve on the outer side of the fixed handle; and concave curves are also provided at the four corners of the handle support pad.

5. The clip applier according to claim 1, wherein: The ligation clamp is V-shaped and includes a first clamp arm, a second clamp arm and a flexible hinge connecting the first clamp arm and the second clamp arm; a locking hook is provided at the end of the first clamp arm, and a locking body is provided at the end of the second clamp arm. The locking hook corresponds to the lock body, and the lock body can be snap-fitted and fixed in the locking hook.

6. The clip applier according to claim 5, wherein: The inner sides of the first clamp arm and the second clamp arm are provided with anti-slip teeth which match each other.

7. The clip applier according to claim 6, wherein: The anti-skid teeth are three-dimensional concave-convex anti-skid teeth.

8. The clip applier according to any one of claims 5 to 7, characterized in that: A first positioning hole is provided at the front end of the inner side of the upper clamp head, and a first positioning block corresponding to the first positioning hole is provided at the first clamp arm; A second positioning hole is provided at the front end of the inner side of the lower clamp head, and a second positioning block corresponding to the second positioning hole is provided at the second clamp arm; The clamp head clamps the first positioning block through the first positioning hole, and the second positioning hole clamps the second positioning block to clamp and fix the ligation clamp.

9. The clip applier according to claim 3 or 4, characterized in that: The inner side of the movable trigger and the outer side of the handle pad are both coated with an antibacterial and anti-slip silicone layer.

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