Ligation clip and clamping and releasing device

Abstract

The utility model discloses a ligation clip, which comprises an upper clip arm, a lower clip arm and a combination part, the upper clip arm and the lower clip arm are arranged in parallel up and down, the combination part connects the upper clip arm and the lower clip arm together, the upper clip arm comprises a first clip arm, a second clip arm and an upper clip connecting arm, the first clip arm and the second clip arm are arranged side by side, and the upper clip connecting arm is used for connecting one end of the first clip arm and one end of the second clip arm together; the lower clamping arm comprises a third clamping arm, a fourth clamping arm and a lower clamping connecting arm, wherein the third clamping arm and the fourth clamping arm are arranged side by side, and the lower clamping connecting arm is used for connecting one end of the third clamping arm and one end of the fourth clamping arm. And the combination part is used for connecting the other ends of the first clamping arm, the second clamping arm, the third clamping arm and the fourth clamping arm together. The ligature clip is simple in structure, convenient to use, capable of reducing shearing force on tissue, capable of being automatically fixed to normal tissue and capable of reducing the risk of falling off. In addition, the utility model further provides a clamping and releasing device used for clamping the ligature clip.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a ligation clamp and a clamping and releasing device. Background Art

[0002] Surgery is a process of cutting and anastomosis of various tissues, which involves the treatment of various tubular structures, such as blood vessels, cystic ducts, and appendix lumens. How to close and treat blind ends to prevent leakage is an important issue that surgeons need to consider. Compared with traditional ligation and suturing, the use of ligation clips such as Hem-o-lok and titanium clips improves surgical efficiency and safety and is widely used in surgical operations, not limited to clamping blood vessels to stop bleeding, closing the cystic duct, and ligating the root of the appendix.

[0003] However, the following problems were found in the clinical use of ligation clips: on the one hand, the widely used ligation clips have a large shear force on the tissue, and it is easy to directly cut the target tissue when closing, especially when the tube wall is edematous, the risk of cutting and falling off during and after surgery will increase, resulting in corresponding clinical consequences such as bile fistula and bleeding; on the other hand, the final outcome of the tissue of the cross section clamped by the existing ligation clips is basically ischemic necrosis, losing normal activity and tension, and the stress resistance at the connection with normal tissue is poor, and it is easy to fall off due to shear force and tissue friction. Taking the ligation of the artery as an example, the healing of the arterial stump after clamping depends on the local thrombosis of the stump blood vessel. If the ligation clip falls off along the boundary between the closed necrotic tissue and the normal tissue due to the influence of high arterial pressure before a firm thrombus is formed, it will cause severe consequences such as heavy bleeding. In clinical practice, when encountering the above situation, the ligation clip is often used to close the ligation clip during surgery, and then the ligation clip is sutured along the stump with sutures to fix it on the normal tissue to reduce the risk of falling off, but this method also weakens the convenience of the ligation clip. Summary of the invention

[0004] The purpose of the utility model is to solve the above problems and provide a ligation clip with a simple structure, easy to use, capable of reducing shear force on tissues, and capable of self-fixing to normal tissues to reduce the risk of falling off; in addition, a clamping and releasing device for clamping the ligation clip is also provided.

[0005] To achieve the above-mentioned purpose of the utility model, the utility model provides a ligation clamp, comprising an upper clamp arm and a lower clamp arm arranged in parallel above and below, and a joint connecting the two, wherein the upper clamp arm comprises a first clamp arm and a second clamp arm arranged side by side, and an upper clamp connecting arm used to connect one end of the first clamp arm and the second clamp arm together; the lower clamp arm comprises a third clamp arm and a fourth clamp arm arranged side by side, and a lower clamp connecting arm used to connect one end of the third clamp arm and the fourth clamp arm together; the joint is used to connect the other ends of the first clamp arm, the second clamp arm, the third clamp arm, and the fourth clamp arm together.

[0006] Preferably, the combining portion comprises a first connecting arm and a second connecting arm arranged side by side, wherein two ends of the first connecting arm are respectively connected to the first clamp arm and the other end of the third clamp arm, and two ends of the second connecting arm are respectively connected to the second clamp arm and the other end of the fourth clamp arm.

[0007] Preferably, the combining portion comprises a connecting arm, one end of which is respectively connected to the other end of the first clamp arm and the second clamp arm, and the other end of which is respectively connected to the other end of the third clamp arm and the fourth clamp arm.

[0008] Preferably, a plurality of fixing members for fixing the ligation clip on normal tissue are arranged on the surface of the first clamp arm facing the third clamp arm.

[0009] Preferably, the fixing member is a probe made of metal.

[0010] Preferably, it also includes an anti-slip structure arranged on the surface of the lower clamping arm facing the upper clamping arm to increase the friction between the lower clamping arm and the tissue.

[0011] Preferably, the anti-slip structure is a grid pattern structure, a convex structure or a concave structure.

[0012] Preferably, it also includes a locking structure disposed on the upper clamping arm and the lower clamping arm for locking the two.

[0013] Preferably, the locking structure is arranged on opposite surfaces of the upper clamp connecting arm and the lower clamp connecting arm.

[0014] Preferably, a clamp arm baffle which is helpful for closing tissue is arranged on the surface of the second clamp arm facing the fourth clamp arm.

[0015] Preferably, the height of the clamp arm baffle is equal to the height of the probe.

[0016] Preferably, the width of the clamp arm baffle is equal to the width of the second clamp arm.

[0017] Preferably, the probe is tapered.

[0018] In addition, the utility model also provides a clamping and releasing device for clamping the ligation clamp as described above, comprising a gripping handle, a rotating joint, a connecting rod, and a clamping portion having an upper clamping arm and a lower clamping arm, wherein the upper clamping arm and the lower clamping arm are provided with a limiting structure for positioning the ligation clamp when clamping it.

[0019] Preferably, the limiting structure includes: an upper buckle structure provided on the surface of the upper clamping arm facing the lower clamping arm for positioning the upper clamping arm of the ligation clamp; and a lower buckle structure provided on the surface of the lower clamping arm facing the upper clamping arm for positioning the lower clamping arm of the ligation clamp.

[0020] Preferably, the upper buckle structure includes a pair of upper arm grooves arranged on the surface of the upper clamping arm, and the lower buckle structure includes a pair of lower arm grooves arranged on the surface of the lower clamping arm.

[0021] Preferably, the surface of the upper clamp holding arm is also provided with an anti-hooking baffle for preventing the fixing part of the ligation clip from hooking with the omentum tissue.

[0022] Preferably, the height of the anti-hooking baffle is equal to the height of the clamping arm baffle.

[0023] Compared with the prior art, the ligation clip and clamping release device of the utility model have the following advantages:

[0024] 1. The ligation clip of the utility model has a simple structure and is easy to use. It can reduce the shear force on the tissue and can be self-fixed to the normal tissue to reduce the risk of falling off.

[0025] 2. In the clamping and releasing device of the utility model, the upper clamping arm and the lower clamping arm are provided with a limiting structure for positioning the ligation clamp when clamping, so that the clamping is stable and the operation efficiency is improved.

[0026] The utility model is described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a perspective view of a structural ligation clip of the utility model from a first viewing angle;

[0028] Figure 2 It is a perspective view of a structural ligation clip of the utility model from a second viewing angle;

[0029] Figure 3 It is a perspective view of another structure of the ligation clip of the utility model;

[0030] Figure 4 It is a structural schematic diagram of the clamping and releasing device of the utility model;

[0031] Figure 5 It is a partial structural schematic diagram of the clamping part of the clamping and releasing device of the utility model;

[0032] Figure 6 It is a longitudinal cross-sectional schematic diagram of the upper clamping arm of the utility model;

[0033] Figure 7 It is a schematic longitudinal section diagram of the lower clamping arm of the utility model. DETAILED DESCRIPTION

[0034] like Figure 1 , Figure 2As shown, they are schematic diagrams of the structure of the ligation clamp of the utility model from different angles. It can be seen from the figure that the ligation clamp of the utility model includes an upper clamp arm, a lower clamp arm and a joint portion connecting the two arranged in parallel, wherein the upper clamp arm includes a first clamp arm 1, a second clamp arm 2 arranged side by side and an upper clamp connecting arm for connecting one end of the first clamp arm and the second clamp arm together; the lower clamp arm includes a third clamp arm 5, a fourth clamp arm 6 arranged side by side and a lower clamp connecting arm for connecting one end of the third clamp arm and the fourth clamp arm together; the joint portion is used to connect the other ends of the first clamp arm, the second clamp arm, the third clamp arm and the fourth clamp arm together.

[0035] The joint part can be made of Figure 1 , Figure 2 The structure shown includes a first connecting arm 3 and a second connecting arm 4 arranged side by side, the two ends of the first connecting arm are respectively connected to the other ends of the first clamping arm and the third clamping arm, and the two ends of the second connecting arm are respectively connected to the other ends of the second clamping arm and the fourth clamping arm. When designing, the spacing between the first clamping arm and the second clamping arm, the spacing between the first connecting arm and the second connecting arm, and the spacing between the third clamping arm and the fourth clamping arm are all equal. The widths of the first connecting arm, the first clamping arm, the third clamping arm, the second connecting arm, the third clamping arm, and the fourth clamping arm can be equal.

[0036] Alternatively, the joint may also be Figure 3 The structure shown includes a connecting arm, one end of which is connected to the other end of the first clamp arm and the second clamp arm respectively, and the other end of the connecting arm is connected to the other end of the third clamp arm and the fourth clamp arm respectively. When designed, the spacing between the first clamp arm and the second clamp arm and the spacing between the third clamp arm and the fourth clamp arm are equal.

[0037] Among them, the joint part can be adopted as follows Figure 1-Figure 3 The obtuse angle structure formed by the upper clamp arm and the lower clamp arm expanding outward and bending, that is, the upper joint part of the joint part used to connect the upper clamp arm and the upper clamp arm, the upper joint part and the lower joint part used to connect the lower clamp arm, and the lower joint part and the lower clamp arm all form an obtuse angle. Alternatively, the joint part can also be an arc-shaped structure expanding outward relative to the upper clamp arm and the lower clamp arm.

[0038] During manufacturing, the ligation clip can be a titanium ligation clip made of biocompatible titanium metal material, or an absorbable ligation clip made of medical absorbable material. The upper clamp arm, the joint part, and the lower clamp arm are integrally formed. When the ligation clip is clamped and force is applied, the joint part is deformed and closed by force, so that the upper clamp arm and the lower clamp arm can be matched to close the tissue.

[0039] The upper and lower clamping arms of the utility model include two clamping arms arranged side by side, which can increase the stability of clamping when clamping tissues, and greatly reduce the shear force on tissues compared to the single-row clamping arms of the prior art, and will not cut the target tissues when closing, thereby reducing the risk of postoperative bleeding, etc. Preferably, the joint part adopts the structure with two connecting arms arranged side by side.

[0040] Furthermore, in order to prevent the ligation clamp from being affected by high blood pressure during surgery, causing the ligation clamp to fall off along the boundary between the closed necrotic tissue and the normal tissue, thereby causing severe consequences such as heavy bleeding, the utility model provides a plurality of fixing members on the first clamp arm that can fix the ligation clamp as a whole on the normal tissue. The fixing members can be a conical probe 7 made of metal that can penetrate into the tissue. The probe is provided on the surface of the first clamp arm facing the third clamp arm (i.e., see Figure 1 There is a certain gap between the multiple probes to facilitate the passage of blood flow, etc., so as to promote the healing of the closed end tissue. When designing, 4 or 6 or other number of probes extending toward the third clamp arm can be arranged in the same gap on the lower surface of the first clamp arm. The probes are conical or pyramidal, and the first probe is close to the upper clamp connection arm of the upper clamp arm.

[0041] When the ligation clamp closes the tissue, the first clamp arm and the third clamp arm will be relatively closed, and the second clamp arm and the fourth clamp arm will be relatively closed. However, since the probe is arranged on the lower surface of the first clamp arm of the ligation clamp, when the first clamp arm and the third clamp arm are correspondingly closed, there will be a gap between the second clamp arm and the fourth clamp arm, which is not conducive to closing the tissue. Therefore, in order to make the second clamp arm and the fourth clamp arm completely closed without leaving a gap so that the ligation clamp can better close the tissue, the utility model arranges a clamp arm baffle 8 on the lower surface of the second clamp arm facing the fourth clamp arm. The clamp arm baffle adopts a metal baffle made of metal, and the height is equal to the height of the probe, so as to ensure that when the upper clamp arm and the lower clamp arm are matched, the heights of the two side clamp arms of the upper and lower clamp arms are equal (that is, the first clamp arm is flush with the second clamp arm, and the third clamp arm is flush with the fourth clamp arm), so that the probe will not be deformed and cause damage to the tissue. In addition, the width of the clamp arm baffle is equal to the width of the second clamp arm, and the length is slightly less than or equal to the length of the second clamp arm.

[0042] Furthermore, in order to increase the contact area between the ligation clamp and the patient's abdominal clamped tissue to increase friction and prevent the ligation clamp from moving when closing the tissue, the utility model is provided with an anti-slip structure on the upper surface of the lower clamp arm facing the upper clamp arm for increasing the friction between it and the tissue. The anti-slip structure can be adopted as follows: Figure 1 The grid pattern structure shown can also be a raised structure (i.e., comprising a plurality of raised points protruding from the upper surface of the lower clamp arm), or a recessed structure (i.e., comprising a plurality of recessed points opened on the upper surface of the lower clamp arm).

[0043] Furthermore, in order to prevent the upper clamp arm and the lower clamp arm from loosening when the ligation clamp closes the tissue, the utility model also provides a locking structure for locking the upper clamp arm and the lower clamp arm, which can be provided on the relative surfaces of the upper clamp connecting arm and the lower clamp connecting arm, and can adopt the following structure, including: a column pin provided on the lower surface of the upper clamp connecting arm and protruding downward; a recessed groove provided on the upper surface of the lower clamp connecting arm and adapted to the column pin. When designing, the height of the column pin and the depth of the recessed groove are reasonably determined so as not to affect the closing of the upper clamp arm and the lower clamp arm after the ligation clamp is deformed by force.

[0044] In addition, the locking structure may also be a structure in which a pin protruding upward is provided on the upper surface of the lower clamp connecting arm and a corresponding recessed groove is provided on the lower surface of the upper clamp connecting arm; the locking structure may also be a buckle structure for locking the upper clamp connecting arm and the lower clamp connecting arm. Of course, the locking structure may also be a structure capable of locking two objects in the prior art.

[0045] In order to meet different clinical occasions and individual needs, the ligation clip can be designed into different models:

[0046] For the standard type, the parameters that can be used are as follows: the length of the upper clamp arm and the lower clamp arm (i.e. the length of the four clamp arms) is 10mm, the horizontal projection length of the joint is 4mm, the probe height and the clamp arm baffle height are 4mm, there are 4 probes in total, the probe diameter is 1mm, the interval is 3mm, the horizontal projection width of the ligation clamp is 4mm, the arm branch (i.e. the four clamp arms) width is 1.5mm, and the branch interval (i.e. the interval between the first clamp arm and the second clamp arm, and the interval between the third clamp arm and the fourth clamp arm) is 1mm.

[0047] For the extended type, the parameters that can be used are as follows: the length of the upper clamp arm and the lower clamp arm is 15mm, the horizontal projection length of the joint is 5mm, the length of the probe and the height of the clamp arm baffle are 6mm, there are 6 probes in total, with a diameter of 1mm and an interval of 2mm, the horizontal projection width of the ligation clamp is 4mm, the width of the wall branch is 1.5mm, and the branch interval is 1mm.

[0048] During design, the above parameters of the ligation clip can be adjusted according to actual needs.

[0049] In addition to providing the above-mentioned ligation clip, the utility model also provides a clamping and releasing device for clamping the above-mentioned ligation clip, such as Figure 4 As shown, it comprises a gripping portion 4, a rotating joint 3, a connecting rod 2, and a clamping portion 1 having an upper clamping arm 11 and a lower clamping arm 12, wherein the upper and lower clamping arms of the clamping portion are respectively used to match the upper and lower clamping arms of the ligation clamp.

[0050] The structure of the clamping and releasing device of the utility model is basically the same as that of the clamping and releasing device of the prior art for clamping a single-row ligation clamp, for example, the clamping part is connected to the holding handle through a connecting rod and a rotating joint, and the front clamping part is rotated within a range of 360° relative to the holding handle through the rotating joint. The holding part is composed of two handles and two elastic metal sheets clamped between the two handles. The upper and lower clamping arms of the ligation clamp can be closed by applying force through the two handles, and the two handles return to their original positions through the elastic deformation of the metal sheets.

[0051] The difference from the prior art lies in that the utility model is provided with a limiting structure for positioning the ligation clamp of the utility model when clamping the above-mentioned ligation clamp of the utility model and an anti-hooking baffle for preventing the probe from hooking the abdominal omentum tissue when the ligation clamp of the utility model enters the abdominal cavity on the upper clamp arm and the lower clamp arm of the clamping and releasing device. Below, only the differences between the utility model and the prior art are described.

[0052] like Figure 5-Figure 7 As shown, the limiting structure of the utility model includes: an upper buckle structure for positioning the upper clamp arm of the ligation clamp, which is arranged on the lower surface of the upper clamp arm facing the lower clamp arm; and a lower buckle structure for positioning the lower clamp arm of the ligation clamp, which is arranged on the upper surface of the lower clamp arm facing the upper clamp arm.

[0053] The upper buckle structure includes a pair of upper arm grooves 112 arranged on the lower surface of the upper clamp arm, and the lower buckle structure includes a pair of lower arm grooves 122 arranged on the upper surface of the lower clamp arm. The positions of the pair of upper arm grooves and the pair of lower arm grooves correspond to each other. The size of the upper arm grooves and the lower arm grooves are equal, the length is greater than or equal to the length of the upper and lower clamp arms of the ligation clamp, and the depth and width are equivalent to the height and width of each clamp arm of the upper and lower clamp arms. The spacing between the pair of upper arm grooves and the pair of lower arm grooves is equal, and is equal to the spacing between the first clamp arm and the second clamp arm of the upper clamp arm of the ligation clamp, that is, it is also equal to the spacing between the third clamp arm and the fourth clamp arm of the lower clamp arm. Through the pair of upper arm grooves and the pair of lower arm grooves, the position of the ligation clamp can be better fixed and positioned when clamping the ligation clamp.

[0054] In addition, in order to prevent the probe on the ligation clamp from hooking the omentum tissue in the abdominal cavity when entering the abdominal cavity during surgery, the anti-hooking baffle 111 of the utility model is a baffle arranged on the lower surface of the upper clamp arm and extending toward the lower clamp arm (see Figure 6 ), the height is equal to the height of the clamp arm baffle of the ligation clamp, and the length is equivalent to the length of the clamp arm baffle. During manufacturing, the anti-hooking baffle is made of metal and extends from the lower surface of the upper clamp arm toward the lower clamp arm, and the outer side wall of the baffle is flush with the outer side wall of the upper clamp arm. The baffle is arranged on the outer side of the groove of the upper clamp arm close to the pair of upper arm grooves for clamping the first clamp arm of the ligation clamp.

[0055] During clinical surgery, when it is necessary to close tubular structures such as blood vessels, cystic ducts, appendix cavities, etc., the ligation clamp of the utility model and the clamping release device matched therewith can be used. When in use, the clamping part of the clamping release device is used to clamp, so that the first clamp arm and the second clamp arm of the upper clamp arm of the ligation clamp are respectively placed in a pair of upper arm grooves of the clamping part, and the first clamp arm is located in an upper arm groove close to the anti-hooking baffle to avoid scratching other tissues when the ligation clamp enters the abdominal cavity. The third clamp arm and the fourth clamp arm of the lower clamp arm of the ligation clamp are respectively placed in a pair of lower arm grooves of the clamping part to ensure the stability of the clamping. It should be noted that when the clamping release device clamps the ligation clamp to close the tissue, the first clamp arm of the ligation clamp should be placed in the end of the tissue to be retained (i.e., the normal tissue side, such as the proximal end of the blood vessel), so that after the tissue is clamped, the ligation clamp can be fixed on the normal tissue through the probe on the first clamp arm. When releasing the ligation clamp, the operator holds the two handles of the clamping part and applies force, and the force is transmitted through the connecting rod to deform the joint of the ligation clamp, so that the upper clamp arm and the lower clamp arm of the ligation clamp are aligned together to close the structure such as tubular tissue. At the same time, the angle of the ligation clamp can be changed by turning the rotating joint, which is convenient for clinical use.

[0056] In summary, through the ligation clamp and clamping release device of the utility model, the shear force on the closed tissue can be reduced by the double clamp arm structure arranged side by side, which is safer during clinical use. The probe of the upper clamp arm can make the ligation clamp as a whole better fixed to the normal tissue, reduce the tension of the closed end tissue, reduce the risk of falling off, and further reduce the incidence of corresponding complications such as bleeding, bile fistula, and intestinal fistula. The comb-like structure formed by the gap between adjacent probes is more conducive to blood flow, so that the clamped blood vessels and the broken ends form thrombi and promote the closure of the stump. Therefore, during clinical use, compared with the existing technology, the number of single-row ligation clamps placed can be reduced, saving medical costs and patient expenses; the suture process can be omitted, making the surgical steps more convenient; breaking the limitation that traditional ligation clamps such as hem-o-lok cannot be used to close arteries in kidney transplant surgery.

[0057] Although the utility model is described in detail above, the utility model is not limited thereto, and technicians in this technical field can make modifications based on the principles of the utility model. Therefore, all kinds of modifications made according to the principles of the utility model should be understood to fall within the protection scope of the utility model.

Claims

1. A ligation clamp, comprising an upper clamp arm and a lower clamp arm arranged in parallel and a joint connecting the upper clamp arm and the lower clamp arm, characterized in that: The upper clamp arm comprises a first clamp arm, a second clamp arm and an upper clamp connecting arm used to connect one end of the first clamp arm and the second clamp arm together; The lower clamp arm comprises a third clamp arm, a fourth clamp arm and a lower clamp connecting arm used to connect one end of the third clamp arm and the fourth clamp arm together. The connecting portion is used to connect the other ends of the first clamp arm, the second clamp arm, the third clamp arm, and the fourth clamp arm together.

2. The ligation clip according to claim 1, characterized in that: The combining portion includes a first connecting arm and a second connecting arm arranged side by side, wherein two ends of the first connecting arm are respectively connected to the first clamping arm and the other end of the third clamping arm, and two ends of the second connecting arm are respectively connected to the second clamping arm and the other end of the fourth clamping arm.

3. The ligation clip according to claim 1, characterized in that: The connecting portion includes a connecting arm, one end of which is respectively connected to the other ends of the first clamp arm and the second clamp arm, and the other end of which is respectively connected to the other ends of the third clamp arm and the fourth clamp arm.

4. The ligation clip according to any one of claims 1 to 3, characterized in that: A plurality of fixing members for fixing the ligation clip on normal tissue are arranged on the surface of the first clamp arm facing the third clamp arm.

5. The ligation clip according to any one of claims 1 to 4, characterized in that: It also includes an anti-slip structure arranged on the surface of the lower clamp arm facing the upper clamp arm to increase the friction between the lower clamp arm and the tissue.

6. The ligation clip according to any one of claims 1 to 5, characterized in that: It also includes a locking structure arranged on the upper clamping arm and the lower clamping arm for locking the two.

7. The ligation clip according to claim 6, characterized in that: The locking structure is disposed on opposite surfaces of the upper clamp connecting arm and the lower clamp connecting arm.

8. A clamping and releasing device for clamping the ligation clip according to any one of claims 1 to 7, comprising a gripping handle, a rotating joint, a connecting rod, and a clamping portion having an upper clamping arm and a lower clamping arm, characterized in that: The upper clamp arm and the lower clamp arm are provided with a limiting structure for positioning the ligation clamp when clamping it.

9. The clamping release device according to claim 8, characterized in that: The limiting structure comprises: An upper buckle structure for positioning the upper clamp arm of the ligation clamp is disposed on the surface of the upper clamp arm facing the lower clamp arm; A lower buckle structure for positioning the lower clamp arm of the ligation clamp is arranged on the surface of the lower clamp arm facing the upper clamp arm.

10. The clamping release device according to claim 9, characterized in that: The upper buckle structure includes a pair of upper arm grooves arranged on the surface of the upper clamping arm, and the lower buckle structure includes a pair of lower arm grooves arranged on the surface of the lower clamping arm.

Images