Minimally invasive osteotomy guide forceps

Abstract

The utility model relates to the technical field of orthopedic surgical instruments, in particular to a pair of minimally invasive osteotomy guide forceps, which comprises a first forceps handle and a second forceps handle, the guiding clamp is reasonable and compact in structure, in the osteotomy process, only periosteum at the position to be subjected to osteotomy needs to be stripped, after the guiding clamp is closed, the left portion of the upper bendable clamp head and the left portion of the lower bendable clamp head can surround the periphery of a bone, the upper guiding groove and the lower guiding groove are synchronously combined, and at the moment, a fretsaw penetrates through the upper guiding groove and the lower guiding groove to conduct osteotomy. The fretsaws can be separated from the corresponding guide grooves to cut off the skeleton by alternately drawing the two ends of the fretsaws; during an operation, the fretsaw is protected by the upper bendable clamp head and the lower bendable clamp head, so that an operative incision cannot be expanded, peripheral nerves, blood vessels and soft tissues of bones can be effectively protected, unnecessary damage to surrounding tissues is avoided, the operation time is greatly shortened, the possibility of postoperative complications is reduced, and the postoperative rehabilitation time of a patient is shortened.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic surgical instruments and is a minimally invasive osteotomy guide forceps. Background Technology

[0002] Currently, orthopedic surgeries often require the removal of portions of bone to achieve specific surgical objectives. In practice, wire saws, oscillating saws, or drills are commonly used for osteotomy. A common surgical method involves first encircling the bone with the wire saw before proceeding with the next sawing operation. This process requires a relatively large operating space, often necessitating an extended surgical incision and extensive dissection of the periosteum surrounding the target area to expand the operable space and achieve direct visualization of the surgical site. Enlarging the surgical incision can lead to prolonged wound healing time, increased risk of infection, and cosmetically unappealing scarring. Furthermore, the process of enlarging the incision can damage surrounding blood vessels and nerves, affecting postoperative functional recovery. Additionally, the use of wire saws and drills for bone cutting often results in insufficient protection of surrounding tissues, leading to damage to surrounding nerves, blood vessels, and soft tissues, resulting in increased bleeding and postoperative functional limitations.

[0003] Therefore, the wire saws used in existing osteotomy procedures have the following shortcomings in actual use: they require enlarging the surgical incision and extensively dissecting the periosteum around the target area to expand the operating space of the wire saw, which can cause damage to surrounding nerves, blood vessels and soft tissues, increasing the risk of postoperative infection, delayed healing and postoperative functional limitations. Summary of the Invention

[0004] This invention provides a minimally invasive osteotomy guide forceps that overcomes the shortcomings of the prior art. It can effectively solve the problems in existing wire saw osteotomy surgery that require expanding the surgical incision and extensively dissecting the periosteum around the target area to increase the operable space, which may cause damage to surrounding nerves, blood vessels and soft tissues, and increase the risk of postoperative infection, delayed healing and postoperative functional limitation.

[0005] The technical solution of this utility model is achieved through the following measures: a minimally invasive osteotomy guide forceps, including a first forceps handle and a second forceps handle hinged together on their left sides by a hinge shaft;

[0006] A lower flexible plier head is fixedly installed on the left end of the first plier handle, and an upper flexible plier head is fixedly installed on the left end of the second plier handle. The lower left side of the upper flexible plier head and the upper left side of the lower flexible plier head are respectively provided with an upper guide groove and a lower guide groove with opposite openings. A lower wire hole with its left end connected to the upper guide groove is provided between the right part of the upper flexible plier head and the lower side of the middle of the second plier handle. An upper wire hole with its left end connected to the lower guide groove is provided between the right part of the lower flexible plier head and the upper side of the middle of the first plier handle. The outer dimensions of the upper guide groove, lower guide groove, upper wire hole and lower wire hole are adapted to the outer diameter of the wire saw.

[0007] The right end of the first clamp handle and the right end of the second clamp handle are respectively rotatably mounted with an upper guide wheel and a lower guide wheel. The outer side of the upper guide wheel and the outer side of the lower guide wheel are respectively fixedly mounted with an upper rotating clamp handle and a lower rotating clamp handle. A clamp head shape locking part is provided between the middle of the upper rotating clamp handle and the middle of the lower rotating clamp handle. The clamp head shape locking part can lock the bending state of the lower flexible clamp head and the upper flexible clamp head. The upper right side of the upper rotating clamp handle and the lower right side of the lower rotating clamp handle are respectively provided with a first clamping handle and a second clamping handle in a ring shape.

[0008] A through-hole is provided between the lower part of the upper flexible pliers head and the lower right side of the pliers wall of the second pliers handle. A lower retraction line is fixedly installed on the inner side of the left end of the lower retraction hole. The other end of the lower retraction line passes through the right end of the lower retraction hole, passes around the lower side of the lower guide wheel, and is fixedly installed together with the right side of the lower guide wheel.

[0009] A lower expansion hole is provided between the upper part of the upper flexible pliers head and the upper right side of the second pliers handle. A lower expansion line is fixedly installed on the inner side of the left end of the lower expansion hole. The other end of the lower expansion line passes through the right end of the lower expansion hole, passes around the upper side of the lower guide wheel, and is fixedly installed together with the right side of the lower guide wheel.

[0010] A through upper contraction hole is provided between the upper part of the lower flexible pliers head and the upper right side of the first pliers handle. An upper contraction line is fixedly installed on the inner side of the left end of the upper contraction hole. The other end of the upper contraction line passes through the right end of the upper contraction hole, passes around the upper side of the upper guide wheel, and is fixedly installed together with the right side of the upper guide wheel.

[0011] A through upper expansion hole is provided between the lower part of the flexible pliers head and the lower right side of the first pliers handle. An upper expansion line is fixedly installed on the inner side of the left end of the upper expansion hole. The other end of the upper expansion line passes through the right end of the upper expansion hole, passes around the lower side of the upper guide wheel, and is fixedly installed together with the right side of the upper guide wheel.

[0012] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0013] The aforementioned flexible pliers head may include an upper fixed pliers head and an upper bending pliers head. The upper fixed pliers head is bent downward into an arc shape. The right end of the upper fixed pliers head is fixedly installed together with the left end of the second pliers handle. The upper part of the left end of the upper fixed pliers head is hinged to an upper bending pliers head that can be bent downward. The upper bending pliers head may include several upper pliers teeth that are hinged together at the top. The lower part of each upper pliers tooth is shaped like an inverted trapezoid with a larger upper part and a smaller lower part. Each upper pliers tooth has a guide groove with an opening facing downward on its lower side. The lower flexible pliers head has the same structure as the upper flexible pliers head and is symmetrically distributed vertically.

[0014] The locking part of the aforementioned pliers head shape may include a locking rod and a locking bolt. The middle part of the lower rotating pliers handle is bent forward to form an arc-shaped groove. The locking rod is provided in the arc-shaped groove. The upper end of the locking rod is rotated together with the lower side of the upper rotating pliers handle at the corresponding position by a screw. A support plate is fixedly installed between the lower side of the lower rotating pliers handle at the position corresponding to the front side of the locking rod and the left end of the second clamping handle. The middle part of the support plate is provided with a locking screw hole that runs through the front and rear. The locking screw hole is provided with a locking bolt whose rear end abuts against the right side of the locking rod.

[0015] The right side of the aforementioned locking rod may be provided with several right-facing limiting notches spaced at intervals.

[0016] The above may also include a third clamping handle, a fourth clamping handle, and a pliers opening locking part. The upper right side of the first pliers handle and the lower right side of the second pliers handle are provided with a ring-shaped third clamping handle and a fourth clamping handle. A pliers opening locking part is provided between the lower side of the first pliers handle corresponding to the left side of the third clamping handle and the corresponding position of the second pliers handle. The pliers opening locking part can limit the opening size of the left end of the first pliers handle and the left end of the second pliers handle.

[0017] The aforementioned clamp opening locking part may include a limiting rod. The second clamp handle, corresponding to the left side of the fourth clamping handle, is bent forward to form an arc-shaped locking groove. The arc-shaped locking groove is provided with a limiting rod whose upper end is fixedly installed together with the lower side of the clamp wall of the first clamp handle. The upper side of the limiting rod is provided with several lower stop teeth, and the arc-shaped locking groove is provided with upper stop teeth that can mesh with the lower stop teeth.

[0018] Both the upper guide groove and the lower guide groove mentioned above can be rectangular grooves.

[0019] This utility model has a reasonable and compact structure and is easy to use. By controlling the rotation direction of the upper and lower rotating clamp handles, it controls the rotation direction of the corresponding guide wheels. This controls the upper contraction line, upper relaxation line, lower contraction line, and lower relaxation line to pull on different side walls of the upper and lower flexible clamp heads during movement, changing the bending state of the upper and lower flexible clamp heads. This allows the left side of the guide clamp to achieve two states: bending and closing, and resetting and opening.

[0020] Compared to existing technologies, this guide clamp only requires peeling the periosteum at the location to be cut during osteotomy. Closing the guide clamp allows the left parts of the upper and lower flexible clamp heads to surround the outer periphery of the bone to be cut. The left ends of the upper and lower guide grooves are simultaneously aligned. At this point, the wire saw is passed through the upper and lower guide grooves. By alternately pulling the two ends of the wire saw, the wire saw can be disengaged from the guide grooves to cut and sever the bone.

[0021] The intraoperative wire saw is protected by the upper and lower flexible clamp heads, which will not enlarge the surgical incision. It can simplify long bone osteotomy in orthopedic surgery, effectively protect the surrounding nerves, blood vessels and soft tissues, avoid unnecessary damage to the surrounding tissues, greatly shorten the operation time, reduce the possibility of postoperative complications and shorten the patient's postoperative recovery time, and reduce patient pain. It is particularly suitable for the promotion and application of minimally invasive surgery in clinical treatment. Attached Figure Description

[0022] Appendix Figure 1 This is a schematic diagram of the main structure of embodiments 1-7 of this utility model.

[0023] Appendix Figure 2 For the appendix Figure 1 A magnified cross-sectional diagram of the upper and middle pincers.

[0024] The codes in the attached diagram are as follows: 1 is the first clamp handle, 2 is the second clamp handle, 3 is the hinge shaft, 4 is the lower flexible clamp head, 5 is the lower wire hole, 6 is the wire saw, 7 is the upper guide wheel, 8 is the lower guide wheel, 9 is the upper rotating clamp handle, 10 is the lower rotating clamp handle, 11 is the first clamping handle, 12 is the second clamping handle, 13 is the lower contraction line, 14 is the lower expansion line, 15 is the upper contraction hole, 16 is the upper contraction line, 17 is the upper expansion hole, 18 is the upper expansion line, 19 is the upper fixed clamp head, 20 is the upper clamp teeth, 21 is the guide groove, 22 is the locking rod, 23 is the locking bolt, 24 is the support plate, 25 is the limiting notch, 26 is the third clamping handle, 27 is the fourth clamping handle, 28 is the limiting rod, 29 is the lower stop tooth, and 30 is the screw. Detailed Implementation

[0025] This invention is not limited to the following embodiments; the specific implementation method can be determined according to the technical solution of this invention and the actual situation.

[0026] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0027] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0028] Example 1: As shown in the attached document Figure 1 , 2 As shown, the minimally invasive osteotomy guide forceps includes a first handle 1 and a second handle 2 that are hinged together on their left sides via a hinge shaft 3.

[0029] A lower flexible plier head 4 is fixedly installed on the left end of the first plier handle 1, and an upper flexible plier head is fixedly installed on the left end of the second plier handle 2. The lower left side of the upper flexible plier head and the upper left side of the lower flexible plier head 4 are respectively provided with an upper guide groove and a lower guide groove with opposite openings. A lower wire hole 5 is provided between the right side of the upper flexible plier head and the lower side of the middle of the second plier handle 2, with its left end connected to the upper guide groove. A higher wire hole is provided between the right side of the lower flexible plier head 4 and the upper side of the middle of the first plier handle 1, with its left end connected to the lower guide groove. The outer dimensions of the upper guide groove, the lower guide groove, the upper wire hole, and the lower wire hole 5 are adapted to the outer diameter of the wire saw 6.

[0030] The right end of the first clamp handle 1 and the right end of the second clamp handle 2 are respectively rotatably mounted with an upper guide wheel 7 and a lower guide wheel 8. The outer side of the upper guide wheel 7 and the outer side of the lower guide wheel 8 are respectively fixedly mounted with an upper rotating clamp handle 9 and a lower rotating clamp handle 10. A clamp head shape locking part is provided between the middle of the upper rotating clamp handle 9 and the middle of the lower rotating clamp handle 10. The clamp head shape locking part can lock the bending state of the lower flexible clamp head 4 and the upper flexible clamp head. The upper right side of the upper rotating clamp handle 9 and the lower right side of the lower rotating clamp handle 10 are respectively provided with a first clamping handle 11 and a second clamping handle 12 in an annular shape.

[0031] A lower retraction hole is provided between the lower part of the upper flexible pliers head and the lower right side of the pliers wall of the second pliers handle 2. A lower retraction line 13 is fixedly installed on the inner side of the left end of the lower retraction hole. The other end of the lower retraction line 13 passes through the right end of the lower retraction hole, passes around the lower guide wheel 8, and is fixedly installed together with the right side of the lower guide wheel 8.

[0032] A lower expansion hole that runs through the left and right sides is provided between the upper part of the upper flexible pliers head and the upper right side of the pliers wall of the second pliers handle 2. A lower expansion line 14 is fixedly installed on the inner side of the left end of the lower expansion hole. The other end of the lower expansion line 14 passes through the right end of the lower expansion hole and passes around the upper side of the lower guide wheel 8 before being fixedly installed together with the right side of the lower guide wheel 8.

[0033] A left-right through upper contraction hole 15 is provided between the upper part of the lower flexible pliers head 4 and the upper right side of the first pliers handle 1. An upper contraction line 16 is fixedly installed on the inner side of the left end of the upper contraction hole 15. The other end of the upper contraction line 16 passes through the right end of the upper contraction hole 15 and passes around the upper side of the upper guide wheel 7 before being fixedly installed together with the right side of the upper guide wheel 7.

[0034] The lower flexible pliers head 4 is provided with a left-right through upper expansion hole 17 between the lower part of the lower part of the first pliers handle 1 and the lower right side of the pliers wall. An upper expansion line 18 is fixedly installed on the inner side of the left end of the upper expansion hole 17. The other end of the upper expansion line 18 passes through the right end of the upper expansion hole 17 and passes around the lower side of the upper guide wheel 7 before being fixedly installed together with the right side of the upper guide wheel 7.

[0035] During use, close the guide pliers: firmly grip the first clamping handle 11 and the second clamping handle 12. At this time, rotating the upper pliers handle 9 will drive the upper guide wheel 7 to rotate clockwise, increasing the contact length between the upper contraction line 16 and the upper guide wheel 7. This allows the upper guide wheel 7 to gradually tighten the upper contraction line 16 while simultaneously relaxing the upper relaxation line 18, so as to contract the upper left side of the lower flexible pliers head 4 and achieve the purpose of bending the left side of the lower flexible pliers head 4 upward. At the same time, rotating the lower pliers handle 10 will drive the lower guide wheel 8 to rotate counterclockwise, increasing the contact length between the lower contraction line 13 and the lower guide wheel 8. This allows the lower guide wheel 8 to gradually tighten the lower contraction line 13 while simultaneously relaxing the lower relaxation line 14, so as to contract the lower left side of the upper flexible pliers head and achieve the purpose of bending the left side of the upper flexible pliers head downward.

[0036] When the left end of the upper flexible clamp head 4 can contact the left end of the lower flexible clamp head 4, the lower flexible clamp head 4 and the upper flexible clamp head 4 bend and close together. At this time, the space enclosed by the upper flexible clamp head 4 and the lower flexible clamp head 4 matches the outer periphery of the bone to be osteotomized. The clamp head shape locking part fixes the bending shape of the upper flexible clamp head 4 and the lower flexible clamp head 4, so that the upper flexible clamp head 4 and the lower flexible clamp head 4 can be kept in the closed state.

[0037] The wire saw 6 is inserted into the guide groove from the right end of the lower wire hole 5. Since the wire saw 6 has a certain rigidity, it will move forward along the inner wall of the lower wire hole 5 into the lower guide groove, then into the upper guide groove, and finally out of the upper wire hole, completing the circumferential operation on the bone located between the upper flexible pliers head and the lower flexible pliers head 4.

[0038] Open the guide clamps: Spread the first clamping handle 11 and the second clamping handle 12 outwards, thereby rotating the upper rotating clamp handle 9 and the lower rotating clamp handle 10 in the opposite direction, so that the upper guide wheel 7 and the lower guide wheel 8 rotate synchronously in the opposite direction, which can increase the contact length between the upper relaxation line 18 and the upper guide wheel 7, and between the lower relaxation line 14 and the lower guide wheel 8. While tightening the upper relaxation line 18 and the lower relaxation line 14, relax the upper contraction line 16 and the lower contraction line 13, thereby correspondingly pulling the upper clamp wall of the upper flexible clamp head and the lower clamp wall of the lower flexible clamp head 4, so that the upper flexible clamp head and the lower flexible clamp head 4 return to their original shape, opening the jaws of the guide clamps so as to remove the guide clamps from the fracture site.

[0039] Depending on the requirements, the flexible lower pliers head 4 and the flexible upper pliers head can be made of elastic or flexible polymer materials in the prior art, or they can be achieved through a folding structure similar to the corrugated pipe in the prior art. The upper contraction line 16, the upper relaxation line 18, the lower contraction line 13, and the lower relaxation line 14 can all be achieved using steel wire or inelastic rope in the prior art, or they can be achieved using toothed belts in the prior art. In this case, the upper guide wheel 7 and the lower guide wheel 8 can be achieved using pulleys adapted to the toothed belt. The pliers head shape locking part can be achieved using the ratchet plate clamping structure commonly used on mosquito hemostatic forceps in the prior art, or it can be achieved using a reverse toothed plate structure that can hook and lock with each other. The cross-sectional shape of the upper guide groove and the lower guide groove can be semi-circular, rectangular, square, dovetail, or trapezoidal. The left ends of the upper guide groove and the lower guide groove respectively pass through the left ends of the corresponding elastic pliers head to facilitate the threading of the wire saw 6.

[0040] This utility model has a reasonable and compact structure and is easy to use. By controlling the rotation direction of the upper rotating clamp handle 9 and the lower rotating clamp handle 10, it controls the rotation direction of the corresponding guide wheel, thereby controlling the upper contraction line 16, the upper expansion line 18, the lower contraction line 13 and the lower expansion line 14 to pull on different side walls of the upper flexible clamp head and the lower flexible clamp head 4 during the movement, changing the bending state of the upper flexible clamp head and the lower flexible clamp head 4, so that the left side of this guide clamp can achieve two states: bending and closing, and resetting and opening.

[0041] Compared to existing technologies, this guide clamp only requires peeling the periosteum at the location to be cut during osteotomy. Closing the guide clamp allows the left side of the upper and lower flexible clamp heads 4 to surround the outer periphery of the bone to be cut. The left ends of the upper and lower guide grooves are simultaneously aligned. At this time, the wire saw 6 is passed through the upper and lower guide grooves. By alternately pulling the two ends of the wire saw 6, the wire saw 6 can be disengaged from the guide groove to cut the bone.

[0042] The intraoperative wire saw 6 is protected by the upper flexible clamp head and the lower flexible clamp head 4, which will not enlarge the surgical incision. It can simplify the long bone osteotomy in orthopedic surgery, effectively protect the surrounding nerves, blood vessels and soft tissues, avoid unnecessary damage to the surrounding tissues, greatly shorten the operation time, reduce the possibility of postoperative complications and shorten the patient's postoperative recovery time, and reduce patient pain. It is especially suitable for the promotion and application of minimally invasive surgery in clinical treatment.

[0043] The aforementioned minimally invasive osteotomy guide clamp can be further optimized and / or improved according to actual needs:

[0044] Example 2: As shown in the attached document Figure 1 , 2As shown, the upper flexible pliers head includes an upper fixed pliers head 19 and an upper flexible pliers head. The upper fixed pliers head 19 is bent downward into an arc shape. The right end of the upper fixed pliers head 19 is fixedly installed together with the left end of the second pliers handle 2. The upper left end of the upper fixed pliers head 19 is hinged to an upper flexible pliers head that can be bent downward. The upper flexible pliers head includes several upper pliers teeth 20 that are hinged together at the top. The lower part of each upper pliers tooth 20 is in the shape of an inverted trapezoid with a larger upper part and a smaller lower part. Each upper pliers tooth 20 has a guide groove 21 with an opening facing downward on its lower side. The lower flexible pliers head 4 has the same structure as the upper flexible pliers head and is symmetrically distributed vertically.

[0045] With this configuration, after the guide clamps are closed, the curved upper and lower fixed clamp heads 19 and 19 can better wrap around the right lateral periphery of the bone to be osteotomized. The upper curved clamp head consists of several upper clamp teeth 20 hinged together to form a toothed chain structure. The lower upper clamp teeth 20 are shaped like an inverted trapezoid, which provides sufficient bending space for the upper curved clamp head to bend downwards, reducing the bending resistance of the upper curved clamp head. This also facilitates the tightening, contraction, and closing of the lower part of the upper clamp teeth 20 by the upper contraction line 16, allowing the upper curved clamp head to fit more closely to the left lateral periphery of the bone to be osteotomized after bending. All the guide grooves 21 are combined to form an upper guide groove.

[0046] Example 3: As shown in the attached document Figure 1 As shown, the locking part of the pliers head includes a locking rod 22 and a locking bolt 23. The middle part of the lower rotating pliers handle 10 is bent forward to form an arc-shaped groove. The locking rod 22 is provided in the arc-shaped groove. The upper end of the locking rod 22 is rotatably installed together with the lower side of the upper rotating pliers handle 9 by screws 30. A support plate 24 is fixedly installed between the lower side of the lower rotating pliers handle 10 corresponding to the front side of the locking rod 22 and the left end of the second clamping handle 12. The middle part of the support plate 24 is provided with a locking screw hole that runs through the front and rear. The locking screw hole is provided with a locking bolt 23 whose rear end abuts against the right side of the locking rod 22.

[0047] With this configuration, rotating the locking bolt 23 until its rear end engages with the right side of the locking rod 22 effectively prevents the upper rotating handle 9 and the lower rotating handle 10 from reversing and resetting, thus avoiding the upper flexible pliers head and the lower flexible pliers head 4 from resetting and opening. The locking rod 22 is rotatably mounted to the corresponding position on the lower side of the upper rotating handle 9 using screws 30, allowing for fine-tuning of the locking rod 22 relative to the upper rotating handle 9, ensuring that the lower part of the locking rod 22 is always within the arc-shaped groove; when cleaning the device or replacing the locking rod 22, it can also be quickly disassembled using screws 30.

[0048] Depending on the requirements, and to facilitate manual tightening, the locking bolt 23 can be achieved using existing hand-tightening bolts.

[0049] Example 4: As shown in the appendix Figure 1As shown, the right side of the locking lever 22 is provided with several right-facing limiting notches 25 spaced at intervals.

[0050] During use, when the rear end of the locking bolt 23 is within the limiting notch 25, it can better restrict the relative position between the locking bolt 23 and the locking rod 22, preventing the locking bolt 23 from slipping and loosening during use.

[0051] Example 5: As shown in the attached document Figure 1 As shown, it also includes a third clamping handle 26, a fourth clamping handle 27, and a jaw opening locking part. The third clamping handle 26 and the fourth clamping handle 27 are arranged in a ring shape on the upper right side of the first clamp 1 and the lower right side of the second clamp 2. The jaw opening locking part is provided between the lower side of the first clamp 1 and the corresponding position of the second clamp 2, corresponding to the left side of the third clamping handle 26. The jaw opening locking part can limit the opening size of the left end of the first clamp 1 and the left end of the second clamp 2.

[0052] With this configuration, by operating the third clamping handle 26 and the fourth clamping handle 27, the opening size of the upper flexible clamping head and the lower flexible clamping head 4 can be quickly adjusted so that the right opening size is adapted to the outer periphery of the right side of the bone to be cut, thereby locking the guide clamp in the position to be cut, so as to better operate the first clamping handle 11 and the second clamping handle 12 and close the guide clamp.

[0053] Depending on the requirements, the locking part of the forceps opening can be achieved by the ratchet plate clamping structure used on mosquito hemostatic forceps in the prior art, or by the reverse tooth plate structure that can hook and lock with each other.

[0054] Example 6: As shown in the appendix Figure 1 As shown, the clamp head opening locking part includes a limiting rod 28. The second clamp handle 2, corresponding to the left side of the fourth clamping handle 27, is bent forward to form an arc-shaped locking groove. The arc-shaped locking groove is provided with a limiting rod 28 whose upper end is fixedly installed together with the lower clamp wall of the first clamp handle 1. The upper side of the limiting rod 28 is provided with several lower stop teeth 29. The arc-shaped locking groove is provided with an upper stop tooth that can mesh with the lower stop teeth 29.

[0055] During use, when the jaws of this guide pliers close, the upper stop tooth and the lower stop tooth 29 at the opposite position engage, which automatically limits the size of the opening between the upper flexible pliers head and the lower flexible pliers head 4, so that the right space of the upper flexible pliers head and the lower flexible pliers head 4 is perfectly matched with the right outer periphery of the bone to be cut, making it more convenient to use and saving operation time.

[0056] Example 7: As attached Figure 1 , 2 As shown, both the upper guide groove and the lower guide groove are rectangular grooves.

[0057] During use, the rectangular groove provides more operating space, which is more conducive to the wire saw 6 cutting and severing bones.

[0058] The usage process of this utility model is as follows:

[0059] Make an incision to expose the bone to be cut. Insert the left part of the upper flexible clamp head and the lower flexible clamp head 4 into the incision. Close the guide clamp so that the upper guide groove and the lower guide groove surround the bone to be cut. The upper guide groove and the lower guide groove will be aligned synchronously.

[0060] When performing bone cutting, pass the wire saw 6 through the openings of the upper and lower guide grooves to complete the circling operation of the wire saw 6 around the bone to be cut. By alternately pulling the two ends of the wire saw 6, the wire saw 6 can be disengaged from the upper and lower guide grooves to cut the bone.

[0061] This device can effectively simplify the long bone osteotomy procedure in orthopedic surgery. The upper flexible clamp head and the lower flexible clamp head 4 can effectively protect the nerves, blood vessels and soft tissues around the affected area, avoid unnecessary damage to the surrounding tissues by the wire saw 6, reduce the possibility of postoperative complications and shorten the patient's postoperative recovery time, and reduce patient suffering.

[0062] The above technical features constitute the embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. A minimally invasive osteotomy guide forceps, characterized in that, Includes a first and a second clamp handle, which are hinged together on their left sides via a hinge axis. A lower flexible plier head is fixedly installed on the left end of the first plier handle, and an upper flexible plier head is fixedly installed on the left end of the second plier handle. The lower left side of the upper flexible plier head and the upper left side of the lower flexible plier head are respectively provided with an upper guide groove and a lower guide groove with opposite openings. A lower wire hole with its left end connected to the upper guide groove is provided between the right part of the upper flexible plier head and the lower side of the middle of the second plier handle. An upper wire hole with its left end connected to the lower guide groove is provided between the right part of the lower flexible plier head and the upper side of the middle of the first plier handle. The outer dimensions of the upper guide groove, lower guide groove, upper wire hole and lower wire hole are adapted to the outer diameter of the wire saw. The right end of the first clamp handle and the right end of the second clamp handle are respectively rotatably mounted with an upper guide wheel and a lower guide wheel. The outer side of the upper guide wheel and the outer side of the lower guide wheel are respectively fixedly mounted with an upper rotating clamp handle and a lower rotating clamp handle. A clamp head shape locking part is provided between the middle of the upper rotating clamp handle and the middle of the lower rotating clamp handle. The clamp head shape locking part can lock the bending state of the lower flexible clamp head and the upper flexible clamp head. The upper right side of the upper rotating clamp handle and the lower right side of the lower rotating clamp handle are respectively provided with a first clamping handle and a second clamping handle in a ring shape. A through-hole is provided between the lower part of the upper flexible pliers head and the lower right side of the pliers wall of the second pliers handle. A lower retraction line is fixedly installed on the inner side of the left end of the lower retraction hole. The other end of the lower retraction line passes through the right end of the lower retraction hole, passes around the lower side of the lower guide wheel, and is fixedly installed together with the right side of the lower guide wheel. A lower expansion hole is provided between the upper part of the upper flexible pliers head and the upper right side of the second pliers handle. A lower expansion line is fixedly installed on the inner side of the left end of the lower expansion hole. The other end of the lower expansion line passes through the right end of the lower expansion hole, passes around the upper side of the lower guide wheel, and is fixedly installed together with the right side of the lower guide wheel. A through upper contraction hole is provided between the upper part of the lower flexible pliers head and the upper right side of the first pliers handle. An upper contraction line is fixedly installed on the inner side of the left end of the upper contraction hole. The other end of the upper contraction line passes through the right end of the upper contraction hole, passes around the upper side of the upper guide wheel, and is fixedly installed together with the right side of the upper guide wheel. A through upper expansion hole is provided between the lower part of the flexible pliers head and the lower right side of the first pliers handle. An upper expansion line is fixedly installed on the inner side of the left end of the upper expansion hole. The other end of the upper expansion line passes through the right end of the upper expansion hole, passes around the lower side of the upper guide wheel, and is fixedly installed together with the right side of the upper guide wheel.

2. The minimally invasive osteotomy guide forceps according to claim 1, characterized in that, The upper flexible pliers head includes an upper fixed pliers head and an upper flexible pliers head. The upper fixed pliers head is bent downward into an arc shape. The right end of the upper fixed pliers head is fixedly installed together with the left end of the second pliers handle. The upper left end of the upper fixed pliers head is hinged to an upper flexible pliers head that can be bent downward. The upper flexible pliers head includes several upper pliers teeth that are hinged together at the top. The lower part of each upper pliers tooth is shaped like an inverted trapezoid with a larger upper part and a smaller lower part. Each upper pliers tooth has a guide groove with an opening facing downward on its lower side. The lower flexible pliers head has the same structure as the upper flexible pliers head and is symmetrically distributed vertically.

3. The minimally invasive osteotomy guide forceps according to claim 1 or 2, characterized in that, The locking part of the pliers head includes a locking rod and a locking bolt. The middle part of the lower rotating pliers handle is bent forward to form an arc-shaped groove. The locking rod is located in the arc-shaped groove. The upper end of the locking rod is rotated together with the lower side of the upper rotating pliers handle at the corresponding position by a screw. A support plate is fixedly installed between the lower side of the lower rotating pliers handle at the position corresponding to the front side of the locking rod and the left end of the second clamping handle. The middle part of the support plate has a locking screw hole that runs through the front and back. The locking screw hole has a locking bolt whose rear end abuts against the right side of the locking rod.

4. The minimally invasive osteotomy guide forceps according to claim 3, characterized in that, The right side of the locking lever has several right-facing limiting notches spaced at intervals.

5. The minimally invasive osteotomy guide forceps according to any one of claims 1, 2, or 4, characterized in that, It also includes a third clamping handle, a fourth clamping handle, and a pliers opening locking part. The upper right side of the first pliers handle and the lower right side of the second pliers handle are provided with a ring-shaped third clamping handle and a fourth clamping handle. A pliers opening locking part is provided between the lower side of the first pliers handle corresponding to the left side of the third clamping handle and the corresponding position of the second pliers handle. The pliers opening locking part can limit the opening size of the left end of the first pliers handle and the left end of the second pliers handle.

6. The minimally invasive osteotomy guide forceps according to claim 3, characterized in that, It also includes a third clamping handle, a fourth clamping handle, and a pliers opening locking part. The upper right side of the first pliers handle and the lower right side of the second pliers handle are provided with a ring-shaped third clamping handle and a fourth clamping handle. A pliers opening locking part is provided between the lower side of the first pliers handle corresponding to the left side of the third clamping handle and the corresponding position of the second pliers handle. The pliers opening locking part can limit the opening size of the left end of the first pliers handle and the left end of the second pliers handle.

7. The minimally invasive osteotomy guide forceps according to claim 5, characterized in that, The clamp head opening locking part includes a limiting rod. The second clamp handle, corresponding to the left side of the fourth clamping handle, is bent forward to form an arc-shaped locking groove. The arc-shaped locking groove is provided with a limiting rod whose upper end is fixedly installed together with the lower side of the clamp wall of the first clamp handle. The upper side of the limiting rod is provided with several lower stop teeth. The arc-shaped locking groove is provided with upper stop teeth that can mesh with the lower stop teeth.

8. The minimally invasive osteotomy guide forceps according to claim 6, characterized in that, The clamp head opening locking part includes a limiting rod. The second clamp handle, corresponding to the left side of the fourth clamping handle, is bent forward to form an arc-shaped locking groove. The arc-shaped locking groove is provided with a limiting rod whose upper end is fixedly installed together with the lower side of the clamp wall of the first clamp handle. The upper side of the limiting rod is provided with several lower stop teeth. The arc-shaped locking groove is provided with upper stop teeth that can mesh with the lower stop teeth.

9. The minimally invasive osteotomy guide forceps according to claim 1, 2, 4, 6, 7, or 8, characterized in that, Both the upper guide groove and the lower guide groove are rectangular grooves.

10. The minimally invasive osteotomy guide forceps according to claim 5, characterized in that, Both the upper guide groove and the lower guide groove are rectangular grooves.

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