A retriever forceps for a fusion device

Abstract

The present invention discloses a fusion device extraction forceps, comprising: a pipe fitting; a rod member, the rod member is disposed within the pipe fitting, and the rod member includes a clamping jaw provided at one end thereof; a seat member, the seat member is located at an end of the rod member away from the clamping jaw and is connected to the rod member; a first wrench, the first wrench is hinged to the seat member, and the first wrench is connected to the pipe fitting; when driving the first wrench to rotate along the hinge point, the first wrench drives the pipe fitting to translate along the rod member, so that the clamping jaw makes a relative displacement in the direction of extending into the pipe fitting, and the clamping jaw is in a clamping state. For the fusion device extraction forceps disclosed by the present invention, the clamping jaw and the fusion device are in a limiting combination, and the two do not require overly precise coordination. During the design and production process of the extraction forceps, there is no need for overly strict requirements on the dimensions, and the clamping action of the fusion device can be completed, and there is almost no risk of dropping.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, and specifically to a fusion device removal forceps. Background Art

[0002] Degenerative disc disease, spondylolisthesis and spinal instability are the primary causes of spinal disability. Spinal fusion is an important method for treating spinal diseases. Specifically, a fusion device needs to be implanted into the lumbar spine to complete the stabilization and reduction of the lumbar spine.

[0003] During the process of lumbar spinal fusion, if the fusion device of inappropriate specification is implanted into the human body, the actual physiological angle of the spine will be unreasonable. In this case, the fusion device needs to be removed, and then a fusion device of appropriate specification is selected and implanted again. Or, if the lumbar fusion device of a patient has been successfully implanted and the fusion device is displaced or the condition worsens for some reason after recovery, the fusion device also needs to be removed and other treatment plans need to be implemented.

[0004] To remove the fusion device, a special surgical instrument - a fusion device removal forceps is required. The fusion device removal forceps mainly performs the actions of clamping the fusion device and applying force to the fusion device to take it out between the cones. The existing fusion device removal tools include through-cheek removal forceps, vise-type removal forceps, etc. During the clamping process, the above-mentioned removal forceps are often locked by a rack method, and the jaws are provided with anti-slip grooves for anti-slip, or the removal forceps and the fusion device are clamped and fixed by means of screw tightening, etc.

[0005] Traditional fusion device removal tools have defects such as the fusion device falling off during use, the mechanism being too complex resulting in limited removal angles, and being cumbersome and not concise in use, making it not so easy to remove the fusion device during the surgical process.

[0006] Based on this, the present invention discloses a fusion device removal forceps to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a fusion device removal forceps to solve the problems raised in the above background art.

[0008] To solve the above technical problems, the present invention provides the following technical solution: A fusion device removal forceps, comprising: a pipe member; a rod member, the rod member is disposed within the pipe member, and the rod member includes a jaw provided at one end thereof; a seat member, the seat member is located at the end of the rod member far from the jaw and is connected to the rod member; a first wrench, the first wrench is hinged to the seat member, and the first wrench is connected to the pipe member; when driving the first wrench to rotate along the hinge point, the first wrench drives the pipe member to translate along the rod member, so that the jaws make a relative displacement in the direction of extending into the pipe member, and the jaws are in a clamping state.

[0009] Furthermore, the rod further includes elastic arms which are located on the side of the rod close to the jaws. There are several elastic arms and several jaws, and the elastic arms and the jaws correspond to each other one by one. At the same time, several elastic arms form a horn-shaped structure.

[0010] Furthermore, the pipe fitting further includes inclined slots. There are several inclined slots which correspond to the elastic arms one by one. At the same time, several inclined slots form a horn-shaped structure; the rod further includes inclined walls located on the elastic arms, and the inclined walls are placed in the inclined slots.

[0011] Furthermore, the pipe fitting includes a limit pin located on its outer wall; the first wrench includes a first waist-shaped through hole located at one end thereof; the limit pin is located in the first waist-shaped through hole.

[0012] Furthermore, the fusion extractor forceps further include a column member and a first elastic member; the seat member includes a second waist-shaped through hole and a column hole opened in the middle thereof. The column member passes through the second waist-shaped through hole, and the first elastic member is placed in the column hole and abuts against the column member; the pipe fitting includes a reset wall surface and a stop wall; when the jaws are in the clamping state, the column member abuts against the stop wall, and when the jaws are in the free state, the column member abuts against the reset wall surface.

[0013] Furthermore, a guide post which passes through the second waist-shaped through hole; a contact cylinder which is sleeved at both ends of the guide post, and the diameter of the contact cylinder is larger than the width of the second waist-shaped through hole. When the jaws are in the clamping state, the contact cylinder abuts against the stop wall, and when the jaws are in the free state, the contact cylinder abuts against the reset wall surface; a stop which is located on the side of the contact cylinder away from the guide post.

[0014] Furthermore, the fusion extractor forceps further include a second wrench which is fixed to the seat member by a column pin. When the first wrench is rotated, the second wrench is used as a fulcrum.

[0015] Furthermore, the fusion extractor forceps further include a second elastic member which is located inside the pipe fitting, and one end of the second elastic member abuts against the inner wall of the pipe fitting, and the other end abuts against the side wall of the rod; when the jaws are in the clamping state, the second elastic member is in a compressed state, and when the jaws are in the free state, the second elastic member is in a free state.

[0016] Furthermore, the pipe fitting further includes an inner edge convex located on its inner wall; the rod further includes an outer edge convex located on the side wall; one end of the second elastic member abuts against the inner edge convex, and the other end abuts against the outer edge convex.

[0017] Further, the seat member further includes a back-knocking block, which is located at one end of the seat member away from the rod member.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0019] 1. For a fusion device removal forceps disclosed by the present invention, during the operation, the removal forceps can penetrate into the human body. The clamping jaws pass through the clamping opening of the fusion device, and by applying force to the wrench, the clamping jaws can be clamped, so that the clamping jaws clamp the fusion device. Since the clamping jaws and the fusion device are in a limit combination, the cooperation between the two does not require overly precise dimensions, which enables the removal forceps to have no overly high requirements for dimensions during the design and production process, that is, the adaptability of the present removal forceps is higher. Moreover, the clamping jaws of the present removal forceps are in a double-column structure. After being clamped, they are inserted into the holes of the fusion device. At the same time, there is also a pipe fitting that generates a pre-tightening force on the clamping jaws, so that the fusion device hardly falls off.

[0020] 2. For a fusion device removal forceps disclosed by the present invention, during the postoperative cleaning, only by applying force to the clamping jaws and screwing off the rod member, the inside of the removal forceps can be cleaned, avoiding the phenomenon that tissue fluid enters the inside of the tool and cannot be cleaned after the removal forceps penetrate into the human body.

[0021] 3. For a fusion device removal forceps disclosed by the present invention, through a column member, a first elastic member, a reset wall surface, a stop wall, etc., the clamping action of the clamping jaws can be locked, and the locking structure is simple and effective. In addition, due to the structure of the column member, the abutting cylinder can be designed into different stepped types according to the width of the opening groove of the fusion device, so as to realize multi-gradient clamping to meet more types of fusion devices.

[0022] 4. A fusion device removal forceps disclosed by the present invention further includes a back-knocking block. If the removal of the fusion device is difficult, the back-knocking block can cooperate with a sliding hammer, and by the sliding hammer generating an impact force on the back-knocking block, the fusion device can be removed. Description of the Drawings

[0023] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0024] Figure 1 is the front view of a fusion device removal forceps in an embodiment of the present invention;

[0025] Figure 2 is the top view of a fusion device removal forceps in an embodiment of the present invention;

[0026] Figure 3 is the exploded view of a fusion device removal forceps in an embodiment of the present invention;

[0027] Figure 4It is a cross-sectional view of a fusion extractor clamp in an embodiment of the present invention;

[0028] Figure 5 It is a perspective view of a column member in an embodiment of the present invention;

[0029] In the figure:

[0030] Pipe fitting 1, inclined groove 11, limit pin 12, reset wall surface 13, retaining wall 14, inner edge convex 15, hanging section 16, first through hole 17;

[0031] Rod member 2, jaw 21, elastic arm 22, inclined wall 23, outer edge convex 24;

[0032] Base member 3, second waist-shaped through hole 31, column hole 32, back-knocking block 33, second through hole 34, third through hole 35;

[0033] First wrench 4, first waist-shaped through hole 41, groove 42;

[0034] Column member 5, guide post 51, abutting cylinder 52, stop 53;

[0035] First elastic member 6;

[0036] Second wrench 7;

[0037] Second elastic member 8. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment: This embodiment provides an optimal solution for a fusion extractor clamp. As Figures 1 to 3 , it first includes a pipe fitting 1 and a rod member 2. The rod member 2 is placed inside the pipe fitting 1, and the rod member 2 includes a jaw 21 provided at one end thereof. Among them, the pipe fitting 1 is a slidable component, and the rod member 2 is a fixed component. When the pipe fitting 1 slides relative to the rod member 2, the jaw 21 is retracted into the pipe fitting 1, causing the jaw 21 to be closed under pressure to complete the clamping action of the jaw 21;

[0040] Furthermore, as Figure 3, the rod 2 further includes elastic arms 22. The elastic arms 22 are located on the side of the rod 2 close to the jaws 21. There are several elastic arms 22 and several jaws 21, and the elastic arms 22 and the jaws 21 correspond to each other one by one. At the same time, the several elastic arms 22 are in a horn-shaped structure, and the jaws 21 and the elastic arms 22 are integrally formed with the rod 2. When the pipe fitting 1 makes a relative sliding along the rod 2 and the jaws 21 are received into the pipe fitting 1, the elastic arms 22 are subjected to the extrusion of the pipe fitting 1, and start to perform a contraction action among themselves, driving the several jaws 21 to also perform a contraction action to complete the clamping action;

[0041] Furthermore, as Figure 3 , the pipe fitting 1 further includes inclined surface grooves 11. There are several inclined surface grooves 11, which correspond to the elastic arms 22 one by one. At the same time, the several inclined surface grooves 11 are in a horn-shaped structure, and the rod 2 further includes inclined surface walls 23 located on the elastic arms 22. The inclined surface walls 23 are placed in the inclined surface grooves 11. When the elastic arms 22 perform a contraction action, the inclined surface walls 23 perform a relative sliding along the inclined surface grooves 11. The inclined surface grooves 11 have both a guiding effect and an extrusion effect on the inclined surface walls 23, ensuring that the jaws 21 and the elastic arms 22 perform actions according to a predetermined trajectory;

[0042] Furthermore, as Figure 3 , in order to realize the relative fixation of the rod 2, the fusion extractor pliers further include a seat member 3. The seat member 3 is located at one end of the rod 2 away from the jaws 21 and is fixedly connected to the rod 2 by threads; in order to ensure that the pipe fitting 1 makes a translation relative to the rod 2, the pipe fitting 1 includes a hanging section 16 provided at one end thereof. The hanging section 16 is a structure with an inverted U-shaped cross-section and is integrally formed with the pipe fitting 1. Correspondingly, the upper part of the seat member 3 is in a circular arc structure. The hanging section 16 is hung on the upper part of the seat member 3, and the two are complementary structures, so as to have a limiting effect on the relative sliding of the pipe fitting 1 and prevent jamming between the pipe fitting 1 and the rod 2;

[0043] Furthermore, as Figure 3 , in order to make the sliding action of the rod 2 controllable, the fusion extractor pliers further include a first wrench 4. The first wrench 4 is hinged to the seat member 3 by a pin. The first wrench 4 is connected to the pipe fitting 1. When driving the first wrench 4 to rotate along the hinge point, the first wrench 4 drives the pipe fitting 1 to translate along the rod 2, so that the jaws 21 make a relative displacement in the direction of extending into the pipe fitting 1;

[0044] Furthermore, as Figure 3, The specific connection method between the first wrench 4 and the pipe fitting 1 is to place the limit pin 12 in the first waist-shaped through hole 41. The limit pin 12 is located on the outer wall of the hanging section 16 of the pipe fitting 1 and is integrally formed with the hanging section 16. The first waist-shaped through hole 41 is located at the end of the first wrench 4. When the first wrench 4 is rotated, its movement is decomposed into a displacement in the vertical direction and a displacement in the horizontal direction. The displacement in the horizontal direction is used to drive the limit pin 12 to perform a translational movement, and the displacement in the vertical direction is offset by the shape of the first waist-shaped through hole 41, finally completing the translation of the pipe fitting 1 under a controllable state;

[0045] Further, as Figure 3 , for the convenience of installing the limit pin 12 and the first waist-shaped through hole 41, a groove 42 is also provided at the end of the first wrench 4 close to the first waist-shaped through hole 41. When installing this instrument, only need to apply force to the end of the first wrench 4 to make the limit pin 12 pass through the groove 42 and be placed in the first waist-shaped through hole 41;

[0046] Further, as Figures 3 to 4 , in order to keep the clamping action when the clamping jaw 21 is in the clamping state, this fusion extractor also includes a column member 5 and a first elastic member 6. The first elastic member 6 is preferably a spring. The seat member 3 includes a second waist-shaped through hole 31 and a column hole 32 opened in the middle thereof. The extending direction of the second waist-shaped through hole 31 is perpendicular to the translation direction of the pipe fitting 1. The column member 5 passes through the second waist-shaped through hole 31. The first elastic member 6 is placed in the column hole 32 and abuts against the column member 5. A reset wall surface 13 is provided at the lower part of the hanging section 16, and a stop wall 14 is provided at the side. When this fusion extractor is in the non-clamping state, the column member 5 abuts against the reset wall surface 13. When this fusion extractor is in the clamping state, the pipe fitting 1 is translated, making the column member 5 and the reset wall surface 13 misaligned with each other. At the same time, under the action of the first elastic member 6, the column member 5 moves along the second waist-shaped through hole 31, making the column member 5 abut against the stop wall 14, thereby maintaining the translation of the pipe fitting 1, that is, maintaining the clamping state of the clamping jaw 21;

[0047] Further, as Figure 5 , the column member 5 includes a guide post 51, an abutting cylinder 52 and a stop 53. The guide post 51 passes through the second waist-shaped through hole 31 and contacts the first elastic member 6. The abutting cylinder 52 is sleeved at both ends of the guide post 51. The diameter of the abutting cylinder 52 is larger than the width of the second waist-shaped through hole 31. When the clamping jaw 21 is in the clamping state, the abutting cylinder 52 abuts against the stop wall 14. When the clamping jaw 21 is in the free state, the abutting cylinder 52 abuts against the reset wall surface 13. The stop 53 is located on the side of the abutting cylinder 52 away from the guide post 51, and is used to prevent the separation between the reset wall surface 13 or the stop wall 14 and the abutting cylinder 52. And the abutting cylinder 52 and the stop 53 are integrally formed, and the two are sleeved on the guide post 51, so that it is convenient for the installation between the column member 5 and the second waist-shaped through hole 31;

[0048] Furthermore, as shown in Figure 3 , the fusion extractor forceps further includes a second wrench 7. The second wrench 7 is fixed to the seat member 3 by a pin and forms an angle with the first wrench 4. When the first wrench 4 is rotated, the second wrench 7 is used as a fulcrum;

[0049] Furthermore, as shown in Figure 4 , the fusion extractor forceps further includes a second elastic member 8. The second elastic member 8 is located inside the pipe fitting 1, and one end of the second elastic member 8 abuts against the inner wall of the pipe fitting 1, and the other end abuts against the side wall of the rod member 2. Specifically, the second elastic member 8 is preferably a spring. The pipe fitting 1 further includes an inner edge protrusion 15 on its inner wall, and the rod member 2 further includes an outer edge protrusion 24 on its side wall. One end of the second elastic member 8 abuts against the inner edge protrusion 15, and the other end abuts against the outer edge protrusion 24. When the fusion extractor forceps is in the clamping state, the second elastic member 8 is in a compressed state. When the fusion extractor forceps is in the free state, the elastic force of the second elastic member 8 drives the pipe fitting 1 to displace away from the jaw 21, so that the pipe fitting 1 is reset;

[0050] Furthermore, as shown in Figure 3 , the seat member 3 further includes a back-knocking block 33. The back-knocking block 33 is located at the end of the seat member 3 away from the rod member 2. If it is difficult to remove the fusion device, the back-knocking block 33 can cooperate with a sledgehammer, and the sledgehammer generates an impact force on the back-knocking block 33 to remove the fusion device;

[0051] Furthermore, as shown in Figures 3 to 4 , for the convenience of postoperative cleaning of the fusion extractor forceps, the pipe fitting 1 further includes a plurality of first through holes 17 provided on its body. The seat member 3 further includes a second through hole 34 that communicates the second waist-shaped through hole 31 with the outside, and a third through hole 35 that communicates the column hole 32 with the outside.

[0052] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0053] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fusion device extraction forceps, characterized in that, Comprising: Pipe fittings; A rod, the rod is placed inside the pipe fitting, and the rod includes a clamping jaw provided at one end thereof; A seat member, the seat member is located at the end of the rod away from the clamping jaw and is connected to the rod; A first wrench, the first wrench is hinged to the seat member, and the first wrench is connected to the pipe fitting; When driving the first wrench to rotate along the hinge point, the first wrench drives the pipe fitting to translate along the rod, so that the clamping jaw makes a relative displacement in the direction of extending into the pipe fitting, and the clamping jaw is in a clamping state; The pipe fitting includes a limit pin located on its outer wall; The first wrench includes a first waist-shaped through hole located at one end thereof; The limit pin is located in the first waist-shaped through hole; The fusion extractor pliers further include a column member and a first elastic member; The seat member includes a second waist-shaped through hole and a column hole opened in the middle thereof. The column member passes through the second waist-shaped through hole, and the first elastic member is placed in the column hole and abuts against the column member; The pipe fitting includes a reset wall surface and a stop wall; When the clamping jaw is in the clamping state, the column member abuts against the stop wall, and when the clamping jaw is in the free state, the column member abuts against the reset wall surface; A guide post, the guide post passes through the second waist-shaped through hole; An abutting cylinder, the abutting cylinder is sleeved at both ends of the guide post, and the diameter of the abutting cylinder is greater than the width of the second waist-shaped through hole. When the clamping jaw is in the clamping state, the abutting cylinder abuts against the stop wall, and when the clamping jaw is in the free state, the abutting cylinder abuts against the reset wall surface; A stop, the stop is located on the side of the abutting cylinder away from the guide post; The fusion extractor pliers further include a second wrench, the second wrench is fixed to the seat member by a column pin, and when the first wrench is rotated, the second wrench is used as a fulcrum; The fusion extractor pliers further include a second elastic member, the second elastic member is located inside the pipe fitting, and one end of the second elastic member abuts against the inner wall of the pipe fitting, and the other end abuts against the side wall of the rod; When the clamping jaw is in the clamping state, the second elastic member is in a compressed state, and when the clamping jaw is in the free state, the second elastic member is in a free state; The pipe fitting further includes an inner edge protrusion located on its inner wall; The rod further includes an outer edge protrusion located on the side wall; One end of the second elastic member abuts against the inner edge protrusion, and the other end abuts against the outer edge protrusion.

2. The extractor forceps for a fusion device according to claim 1, characterized in that: The rod further includes elastic arms, the elastic arms are located on the side of the rod close to the clamping jaw, there are several elastic arms and clamping jaws, and the elastic arms and the clamping jaws correspond one by one, and at the same time, several of the elastic arms are in a trumpet-shaped structure; 3. The extractor forceps for a fusion device according to claim 2, characterized in that: The pipe fitting further includes inclined slots, there are several inclined slots, corresponding one by one to the elastic arms, and at the same time, several of the inclined slots are in a trumpet-shaped structure; The rod further includes inclined plane walls located on the elastic arms, and the inclined plane walls are placed in the inclined slots; 4. A fusion extractor forceps according to any one of claims 1 to 3, characterized in that: The seat member further includes a back-knocking block, and the back-knocking block is located at the end of the seat member away from the rod.

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