Derotation orthopedic track device in scoliosis deformity surgery

Abstract

The invention discloses a device for rotating an orthopedic track in scoliosis deformity surgery, which comprises two forceps arms hinged with each other, the two ends of each forceps arm are respectively a clamping end and a holding end, and the hinge point between the two forceps arms is positioned between the clamping end and the holding end of each forceps arm. The clamping end of each clamp arm is provided with two clamping arms capable of moving close to or away from each other. The invention aims to provide the device for rotating the orthopedic track in the scoliosis deformity operation, and the device can enable two adjacent vertebral bodies with overlarge intervertebral space to move close to each other, so that the space between the two vertebral bodies is reduced to meet the requirement.

Description

Technical Field

[0001] The invention relates to the field of medical instruments, and in particular to a medical instrument used in scoliosis deformity surgery. Background Art

[0002] Scoliosis is a deformity that occurs and develops in three-dimensional space, and axial rotation of the spine is one of the main deformities of scoliosis. In existing scoliosis deformity surgery, it is necessary to install pedicle screws and pre-bent titanium alloy rods and then use rotation rods, translation, intervertebral disc distraction, pressurization and other operations to complete derotation correction. In the above-mentioned scoliosis deformity surgery, if the gap between two adjacent vertebrae is too large, the two vertebrae need to be brought closer to each other to reduce the intervertebral gap, but there is currently no suitable tool to allow two adjacent vertebrae with too large intervertebral gaps to move closer to each other. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a derotational correction track device in scoliosis deformity surgery, which can allow two adjacent vertebrae with excessive intervertebral space to move closer to each other, so that the space between the two vertebrae becomes smaller to meet the requirements.

[0004] The derotational correction track device in scoliosis deformity surgery of the present invention comprises two clamp arms hinged to each other, each of the two ends of the clamp arm is a clamping end and a holding end respectively, the hinge point between the two clamp arms is located between the clamping end and the holding end of each clamp arm, and the clamping end of each clamp arm is provided with two clamp arms that can move towards or away from each other.

[0005] The present invention provides a derotational correction track device for scoliosis deformity surgery, wherein a sleeve is fixedly provided on the clamping end of each clamp arm, an axially arranged slot is provided on the wall of the sleeve, a threaded rod is rotatably provided in the sleeve, the threaded rod is arranged along the axial direction of the sleeve, a first thread segment and a second thread segment with opposite rotation directions are provided on the threaded rod, the two clamp arms that can move towards or away from each other are respectively a first clamp arm and a second clamp arm, the first clamp arm and the second clamp arm are respectively threadedly connected to the first thread segment and the second thread segment, the ends of the first clamp arm and the second clamp arm away from the threaded rod extend to the outside of the sleeve through the slot, and the slot is adapted to the first clamp arm and the second clamp arm.

[0006] The present invention provides a derotational correction track device for scoliosis deformity surgery, wherein a sleeve is fixedly provided on the clamping end of each clamp arm, an axially arranged notch is provided on the wall of the sleeve, a threaded rod is rotatably provided in the sleeve, the threaded rod is arranged along the axial direction of the sleeve, a first thread segment and a second thread segment with opposite rotation directions are provided on the threaded rod, the two clamp arms that can move towards or away from each other are respectively a first clamp arm and a second clamp arm, the first clamp arm and the second clamp arm are respectively threadedly connected to the first thread segment and the second thread segment, the first clamp arm and the second clamp arm are both slidably connected to the sleeve along the axial direction of the sleeve, and the ends of the first clamp arm and the second clamp arm away from the threaded rod extend to the outside of the sleeve through the notch.

[0007] The invention discloses a derotational correction track device for scoliosis deformity surgery, wherein the inner cylinder wall of the sleeve is provided with an axially arranged slide groove, the first clamp arm and the second clamp arm are both provided with a slider used in conjunction with the slide groove, and the slider is located in the slide groove.

[0008] The invention discloses a derotational correction track device for scoliosis deformity surgery, wherein the inner cylinder wall of the sleeve is provided with an axially arranged strip slider, the first clamp arm and the second clamp arm are both provided with a slide groove used in conjunction with the strip slider, and the strip slider is located in the slide groove.

[0009] The present invention discloses a derotational correction track device for scoliosis deformity surgery, wherein each of the clamp arms comprises a first clamp arm and a second clamp arm which are parallel to each other, the gripping ends of the first clamp arm and the second clamp arm are connected by a gripping rod, the sleeve is fixedly provided between the clamping ends of the first clamp arm and the second clamp arm, the first clamp arm and the second clamp arm of one clamp arm are both located between the first clamp arm and the second clamp arm of the other clamp arm, the two first clamp arms are arranged close to each other and are hinged by a first hinge, the two second clamp arms are arranged close to each other and are hinged by a second hinge, the hinge axes of the first hinge and the second hinge are coaxially arranged, and the axial direction of the sleeve is parallel to the hinge axes of the first hinge and the second hinge.

[0010] The invention discloses a derotational correction track device for scoliosis deformity surgery, wherein both ends of the sleeve are provided with baffles, the clamping ends of the first and second clamp arms are respectively fixedly connected to the baffles at both ends of the sleeve, and the threaded rod is rotatably arranged between the two baffles.

[0011] The invention discloses a derotational correction track device for scoliosis deformity surgery, wherein both ends of the threaded rod are rotatably mounted on two baffles via bearings, and one end of the threaded rod passes through an adjacent baffle and extends to the outside of a sleeve and is fixedly connected to a rotating handle.

[0012] The present invention discloses a derotational correction track device for scoliosis deformity surgery, wherein the two ends of the threaded rod respectively pass through adjacent baffles and are rotatably mounted on the clamping ends of the first and second branch clamp arms through bearings, and one end of the threaded rod passes through the first and second branch clamp arms and is fixedly connected to a rotating handle.

[0013] The invention discloses a derotational correction track device for scoliosis deformity surgery, wherein the holding rod is rotatably connected between the holding ends of the first branch clamp arm and the second branch clamp arm.

[0014] The derotation correction track device in scoliosis deformity surgery of the present invention is different from the prior art in that when the derotation correction track device in scoliosis deformity surgery of the present invention is used, the surgeon first adjusts the distance between the two clamp arms on the clamping end of each clamp arm (that is, the two clamp arms are moved closer to or away from each other to achieve the distance between the two clamp arms larger than the size of the vertebral body, and then holds the gripping ends of the two clamp arms and moves them closer to or away from each other. Since the two clamp arms are hinged to each other, the clamping ends of the two clamp arms also move closer to or away from each other. When the distance between the clamping ends of the two clamp arms is equal to the distance between the two clamp arms, the surgeon first adjusts the distance between the two clamp arms on the clamping end of each clamp arm (that is, the distance between the two clamp arms is greater than the size of the vertebral body). After the spacing between two adjacent vertebrae is corresponding, the two clamp arms of one clamp arm clamping end are respectively placed on both sides of one vertebrae, and the two clamp arms of the other clamp arm clamping end are respectively placed on both sides of the other vertebrae, and then the two clamp arms of each clamp arm clamping end are moved closer to each other until the two pairs of clamp arms clamp the two vertebrae respectively, and then the holding ends of the two clamp arms are moved closer to each other, so the clamp ends of the two clamp arms are also moved closer to each other at the same time, and the two vertebrae follow the clamp ends of the two clamp arms and move closer to each other at the same time until the gap between the two vertebrae is reduced to meet the requirements. Finally, the two clamp arms of each clamp arm clamping end are moved away from each other to release the vertebrae, and then the present invention can be removed.

[0015] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the derotation correction track device in scoliosis deformity surgery of the present invention;

[0017] Figure 2 for Figure 1 Left view of

[0018] Figure 3 It is a front view of the sleeve in the present invention;

[0019] Figure 4 For along Figure 3 Sectional view along line AA;

[0020] Figure 5 for Figure 3Left view of

[0021] Figure 6 for Figure 3 Right view of;

[0022] Figure 7 for Figure 3 A top view of

[0023] Figure 8 for Figure 3 Bottom view of

[0024] Fig. 9 The main cross-sectional view of the sleeve in the present invention is Figure 1 ;

[0025] Fig.10 The main cross-sectional view of the sleeve in the present invention is Figure 2 . DETAILED DESCRIPTION

[0026] like Figure 1 As shown, combined with Figure 2-10 As shown, the derotational correction track device in scoliosis deformity surgery of the present invention includes two clamp arms 1 hinged to each other, each of the two ends of the clamp arm 1 is a clamping end and a holding end respectively, the hinge point between the two clamp arms 1 is located between the clamping end and the holding end of each clamp arm 1, and the clamping end of each clamp arm 1 is provided with two clamp arms 14, 8 that can move towards or away from each other.

[0027] The derotational correction track device for scoliosis deformity surgery of the present invention, wherein a sleeve 7 is fixedly provided on the clamping end of each clamp arm 1, such as Figure 8 , 9 As shown in Figures 10 and 11, an axially arranged notch 11 is provided on the wall of the sleeve 7, a threaded rod 10 is rotatably provided in the sleeve 7, the threaded rod 10 is arranged along the axial direction of the sleeve 7, a first thread segment and a second thread segment with opposite rotation directions are provided on the threaded rod 10, the two clamping arms 14 and 8 that can move towards or away from each other are respectively the first clamping arm 14 and the second clamping arm 8, nuts are fixed on the first clamping arm 14 and the second clamping arm 8, the first clamping arm 14 and the second clamping arm 8 are respectively threadedly connected to the first thread segment and the second thread segment through the nuts on themselves, the ends of the first clamping arm 14 and the second clamping arm 8 away from the threaded rod 10 extend to the outside of the sleeve 7 through the notch 11, and the notch 11 and the first clamping arm 14 and the second clamping arm 8 are adapted to each other.

[0028] The mutual adaptation of the slot 11 and the first clamp arm 14 and the second clamp arm 8 means that the width of the slot 11 is slightly larger than the width of the first clamp arm 14 and the second clamp arm 8, that is, there is a gap between the first clamp arm 14 and the second clamp arm 8 and the slot wall of the slot 11, but the gap is small.

[0029] When the threaded rod 10 is rotated, since the first clamp arm 14 and the second clamp arm 8 pass through the slot 11 and the width of the slot 11 is slightly larger than the width of the two clamp arms 14 and 8, the two clamp arms 14 and 8 are restricted by the slot 11 and cannot rotate with the threaded rod 10. Since the first clamp arm 14 and the second clamp arm 8 are respectively threadedly connected to the first thread segment and the second thread segment with opposite rotation directions, the two clamp arms 14 and 8 move toward or away from each other along the axial direction of the threaded rod 10 (which is also the axial direction of the sleeve 7).

[0030] Of course, the first clamp arm 14 and the second clamp arm 8 can also be installed on the sleeve 7 in the following manner: a sleeve 7 is fixedly provided on the clamping end of each of the clamp arms 1, and an axially arranged notch 11 is provided on the wall of the sleeve 7; a threaded rod 10 is rotatably provided in the sleeve 7, and the threaded rod 10 is arranged along the axial direction of the sleeve 7; a first thread segment and a second thread segment with opposite rotation directions are provided on the threaded rod 10; the two clamp arms 14 and 8 that can move towards or away from each other are respectively the first clamp arm 14 and the second clamp arm 8; nuts are fixedly provided on the first clamp arm 14 and the second clamp arm 8; the first clamp arm 14 and the second clamp arm 8 are respectively threadedly connected to the first thread segment and the second thread segment through the nuts on themselves; the first clamp arm 14 and the second clamp arm 8 are both slidably connected to the sleeve 7 along the axial direction of the sleeve 7; the ends of the first clamp arm 14 and the second clamp arm 8 away from the threaded rod 10 extend to the outside of the sleeve 7 through the notch 11.

[0031] In the above installation method, there is no restriction that the width of the slot 11 is slightly larger than the width of the two clamp arms 14, 8. The width of the slot 11 only needs to allow the two clamp arms 14, 8 to pass through. In other words, the slot 11 is not used to restrict the two clamp arms 14, 8 to prevent them from rotating with the threaded rod 10. Instead, the two clamp arms 14, 8 are slidably connected to the sleeve 7, so that the two clamp arms 14, 8 cannot rotate with the threaded rod 10. When the two clamp arms 14, 8 are slidably connected to the sleeve 7, the following two methods can be adopted: (1) An axially arranged sliding groove is provided on the inner wall of the sleeve 7, and a slider 12 used in conjunction with the sliding groove is provided on the first clamp arm 14 and the second clamp arm 8, and the slider 12 is located in the sliding groove. (2) An axially arranged strip slider is provided on the inner wall of the sleeve 7, and a sliding groove used in conjunction with the strip slider is provided on the first clamp arm 14 and the second clamp arm 8, and the strip slider is located in the sliding groove.

[0032] like Figure 4As shown, when a slide groove is provided on the inner wall of the sleeve 7 and sliders 12 are provided on the two clamping arms 14 and 8, two slide grooves arranged opposite to each other are provided on the inner wall of the sleeve 7, and two sliders 12 are provided on the two clamping arms 14 and 8, and the two sliders 12 are respectively located in the two slide grooves. When the threaded rod 10 rotates, due to the restrictions of the sliders 12 and the slide grooves, the two clamping arms 14 and 8 cannot rotate with the threaded rod 10, but can only slide along the slide grooves through the sliders 12 on themselves, that is, slide closer to or away from each other along the axial direction of the sleeve 7 (also the axial direction of the threaded rod 10).

[0033] When a strip slider is provided on the inner wall of the sleeve 7 and a slide groove is provided on the two clamping arms 14 and 8, two strip sliders arranged opposite to each other are provided on the inner wall of the sleeve 7, two slide grooves are provided on the two clamping arms 14 and 8, and the two strip sliders are respectively located in the two slide grooves. When the threaded rod 10 rotates, due to the restrictions of the strip slider and the slide groove, the two clamping arms 14 and 8 cannot rotate with the threaded rod 10, but can only slide along the strip slider through the slide grooves on themselves, that is, slide closer to or away from each other along the axial direction of the sleeve 7 (also the axial direction of the threaded rod 10).

[0034] like Figure 1-3 As shown in 7-10, the derotation correction track device in the scoliosis deformity surgery of the present invention, wherein each of the clamp arms 1 includes a first clamp arm 2 and a second clamp arm 3 which are parallel to each other, and the two ends of the first clamp arm 2 and the second clamp arm 3 are the two ends of the clamp arm 1, that is, the gripping end of the clamp arm 1 is the gripping end of the first clamp arm 2 and the second clamp arm 3, and the clamping end of the clamp arm 1 is the clamping end of the first clamp arm 2 and the second clamp arm 3. The gripping ends of the first clamp arm 2 and the second clamp arm 3 are connected by a gripping rod 4, and the sleeve 7 is fixedly arranged between the clamping ends of the first clamp arm 2 and the second clamp arm 3. Under the fixing action of the sleeve 7, the first clamp arm 2 and the second clamp arm 3 can always maintain a parallel state. The first clamp arm 2 and the second clamp arm 3 of one clamp arm 1 are both located between the first clamp arm 2 and the second clamp arm 3 of another clamp arm 1, that is, one clamp arm 1 is sleeved between the other clamp arm 1. The two first sub-pliers arms 2 are arranged close to each other and are hingedly connected by a first hinge, the two second sub-pliers arms 3 are arranged close to each other and are hingedly connected by a second hinge, the hinge axes of the first hinge and the second hinge are coaxially arranged, and the axial direction of the sleeve 7 is parallel to the hinge axes of the first hinge and the second hinge.

[0035] In this embodiment, the first hinge adopts the first pin 5, and the hinge axis of the first hinge is the axis of the first pin 5. The second hinge adopts the second pin 6, and the hinge axis of the second hinge is the axis of the second pin 6. The hinge axes of the first hinge and the second hinge are coaxially arranged, which can be regarded as the coaxial arrangement of the axes of the first pin 5 and the second pin 6, that is, the first pin 5 and the second pin 6 are coaxially arranged. The axial direction of the sleeve 7 is parallel to the hinge axes of the first hinge and the second hinge, which can be regarded as the axial direction of the sleeve 7 is parallel to the axes of the first pin 5 and the second pin 6, that is, the axial direction of the sleeve 7 is parallel to the axial direction of the first pin 5 and the second pin 6.

[0036] like Figure 1 , 2 As shown, the axial direction of the holding rod 4, the axial direction of the first pin 5 and the second pin 6, the axial direction of the sleeve 7 and the axial direction of the threaded rod 10 are all parallel to each other. Of course, in this embodiment, the sleeve 7 and the threaded rod 10 are coaxially arranged.

[0037] For each pliers arm 1, the holding rod 4, the first sub-pliers arm 2, the second sub-pliers arm 3 and the sleeve 7 together form a rectangular structure, that is, when a pliers arm 1 rotates around the first pin 5 and the second pin 6, the first sub-pliers arm 2 and the second sub-pliers arm 3 constituting the pliers arm 1 and the holding rod 4 and the sleeve 7 connecting the two sub-pliers arms all rotate together. The operator holds the holding rods 4 at the holding ends of the two clamp arms 1 and allows the two holding rods 4 to move towards or away from each other. Driven by the two holding rods 4, the holding ends of the two clamp arms 1 move towards or away from each other. Since the two clamp arms 1 are hinged to each other, that is, the two first branch clamp arms 2 are hinged through the first pin 5, and the two second branch clamp arms 3 are hinged through the second pin 6, and the first pin 5 and the second pin 6 are coaxially arranged, the clamping ends of the two clamp arms 1 also move towards or away from each other. Since the two sleeves 7 are respectively fixed on the clamping ends of the two clamp arms 1, the two sleeves 7 also move towards or away from each other, so the clamping arms respectively arranged on the two sleeves 7 also move towards or away from each other with the two sleeves 7.

[0038] like Fig. 9 , 10 As shown, the derotational correction track device in scoliosis deformity surgery of the present invention, wherein baffles 13 are fixedly provided at both ends of the sleeve 7, and the clamping ends of the first branch clamp arm 2 and the second branch clamp arm 3 are respectively fixedly connected to the baffles 13 at both ends of the sleeve 7, thereby achieving the purpose of fixing the sleeve 7 between the clamping ends of the first branch clamp arm 2 and the second branch clamp arm 3.

[0039] The threaded rod 10 is rotatably arranged between the two baffles 13, and the specific method is as follows: Fig.10 As shown, combined with Figure 1 , 2As shown in FIGS. 3 and 5, the two ends of the threaded rod 10 are rotatably mounted on two baffles 13 through bearings, and one end of the threaded rod 10 passes through the adjacent baffle 13 and extends to the outside of the sleeve 7 and is fixedly connected to a rotating handle 9. At this time, although the first branch clamp arm 2 and the second branch clamp arm 3 are fixed on the baffle 13, the clamping ends of the first branch clamp arm 2 and the second branch clamp arm 3 are higher than the position of the threaded rod 10 on the baffle 13, so that the branch clamp arm does not hinder one end of the threaded rod 10 from extending from the inside of the sleeve 7 to the outside of the sleeve 7 and being fixedly connected to the rotating handle 9. The purpose of providing the rotating handle 9 is to facilitate the operator to rotate the threaded rod 10.

[0040] Of course, in addition to the above-mentioned method of rotating the threaded rod 10 between the two baffles 13, the following method can also be adopted: Fig. 9 As shown, combined with Figure 6 As shown, the two ends of the threaded rod 10 are respectively passed through the adjacent baffles 13 and then rotatably mounted on the clamping ends of the first branch tong arm 2 and the second branch tong arm 3 through bearings, and one end of the threaded rod 10 is fixedly connected to a rotating handle 9 after passing through the first branch tong arm 2 or the second branch tong arm 3. At this time, the clamping ends of the first branch tong arm 2 and the second branch tong arm 3 pass through the axis of the threaded rod 10 / sleeve 7, so that the two ends of the threaded rod 10 can be rotatably mounted on the clamping ends of the first branch tong arm 2 and the second branch tong arm 3 through bearings after passing through the adjacent baffles 13.

[0041] like Figure 1 , 2 As shown, in the derotation correction track device for scoliosis deformity surgery of the present invention, the holding rod 4 is rotatably connected between the holding ends of the first branch clamp arm 2 and the second branch clamp arm 3. In this way, when the operator holds the holding rod 4 and moves the holding ends of the two clamp arms 1 toward or away from each other, there will be no relative rotation between the operator's hand and the holding rod 4, which is convenient for operation. Otherwise, if the holding rod 4 is fixedly connected to the holding ends of the first branch clamp arm 2 and the second branch clamp arm 3, the operator needs to constantly adjust the relative position between the hand and the holding rod 4, which is inconvenient for operation.

[0042] like Figure 1 , 2As shown, when the derotation correction track device in scoliosis deformity surgery of the present invention is used, the surgeon first adjusts the distance between the two clamp arms 14, 8 on the clamping end of each clamp arm 1 (that is, rotating the rotating handle 9 to rotate the threaded rod 10, so that the two clamp arms 14, 8 move closer to or away from each other), so that the distance between the two clamp arms 14, 8 is larger than the size of the vertebral body, and then holds the holding rod 4 at the holding end of the two clamp arms 1 and moves them closer to or away from each other. Driven by the holding rod 4, the holding ends of the two clamp arms 1 also move closer to or away from each other. Since the two clamp arms 1 are hinged to each other (that is, the two first sub-clamp arms 2 are hinged by the first pin 5, and the two second sub-clamp arms 3 are hinged by the second pin 6, and the first pin 5 and the second pin 6 are coaxially arranged), the clamping ends of the two clamp arms 1 also move closer to or away from each other, and the two sleeves 7 also move closer to or away from each other. After the distance between the clamping ends corresponds to the spacing between two adjacent vertebrae, that is, the distance between the clamping arm of one sleeve 7 and the clamping arm of another sleeve 7 corresponds to the spacing between two adjacent vertebrae, the two clamping arms 14 and 8 of the clamping end of one clamp arm 1 are respectively placed on both sides of one vertebrae, and the two clamping arms 14 and 8 of the clamping end of the other clamp arm 1 are respectively placed on both sides of the other vertebrae, and then the two clamping arms 14 and 8 of the clamping end of each clamp arm 1 are moved closer to each other until the two pairs of clamping arms clamp the two vertebrae respectively, and then the holding ends of the two clamp arms 1 are moved closer to each other, so the clamping ends of the two clamp arms 1 and the sleeves 7 thereon also move closer to each other at the same time. Since the vertebrae are clamped between the two clamp arms 14 and 8 of the sleeve 7, the two vertebrae follow the clamping ends of the two clamp arms 1 and the sleeves 7 thereon and also move closer to each other at the same time until the gap between the two vertebrae becomes small to meet the requirements. Finally, the two clamp arms 14, 8 at the clamping end of each clamp arm 1 are moved away from each other to release the vertebral body, and then the present invention is removed.

[0043] It should be noted that the directions or positional relationships indicated by terms such as “center”, “up”, “down”, “front”, “back”, “left”, “right”, and “middle” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The embodiments described above are merely descriptions of preferred implementation modes of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A derotational correction track device for scoliosis deformity surgery, characterized in that: It comprises two clamp arms hinged to each other, each of the two ends of the clamp arm is a clamping end and a holding end respectively, the hinge point between the two clamp arms is located between the clamping end and the holding end of each clamp arm, and the clamping end of each clamp arm is provided with two clamp arms that can move towards or away from each other.

2. The derotation correction track device for scoliosis deformity surgery according to claim 1, characterized in that: A sleeve is fixedly provided on the clamping end of each clamp arm, and an axially arranged slot is provided on the wall of the sleeve. A threaded rod is rotatably provided in the sleeve, and the threaded rod is arranged along the axial direction of the sleeve. A first thread segment and a second thread segment with opposite rotation directions are provided on the threaded rod. The two clamp arms that can move towards or away from each other are respectively the first clamp arm and the second clamp arm, and the first clamp arm and the second clamp arm are respectively threadedly connected to the first thread segment and the second thread segment, and the ends of the first clamp arm and the second clamp arm away from the threaded rod extend through the slot to the outside of the sleeve, and the slot is adapted to the first clamp arm and the second clamp arm.

3. The derotation correction track device for scoliosis deformity surgery according to claim 1, characterized in that: A sleeve is fixedly provided on the clamping end of each clamp arm, and an axially arranged groove is provided on the wall of the sleeve. A threaded rod is rotatably provided in the sleeve, and the threaded rod is arranged along the axial direction of the sleeve. A first thread segment and a second thread segment with opposite rotation directions are provided on the threaded rod. The two clamp arms that can move towards or away from each other are respectively the first clamp arm and the second clamp arm, and the first clamp arm and the second clamp arm are respectively threadedly connected to the first thread segment and the second thread segment, and the first clamp arm and the second clamp arm are both slidably connected to the sleeve along the axial direction of the sleeve, and the ends of the first clamp arm and the second clamp arm away from the threaded rod extend to the outside of the sleeve through the groove.

4. The derotation correction track device for scoliosis deformity surgery according to claim 3, characterized in that: An axially arranged sliding groove is provided on the inner cylinder wall of the sleeve, and a sliding block used in cooperation with the sliding groove is provided on both the first clamp arm and the second clamp arm, and the sliding block is located in the sliding groove.

5. The derotation correction track device for scoliosis deformity surgery according to claim 3, characterized in that: An axially arranged strip-shaped slider is provided on the inner cylinder wall of the sleeve, and a slide groove used in cooperation with the strip-shaped slider is provided on both the first clamp arm and the second clamp arm, and the strip-shaped slider is located in the slide groove.

6. The derotation correction track device for scoliosis deformity surgery according to any one of claims 2 to 5, characterized in that: Each of the clamp arms includes a first clamp arm and a second clamp arm parallel to each other, the holding ends of the first clamp arm and the second clamp arm are connected by a holding rod, the sleeve is fixedly arranged between the clamping ends of the first clamp arm and the second clamp arm, the first clamp arm and the second clamp arm of one clamp arm are both located between the first clamp arm and the second clamp arm of the other clamp arm, the two first clamp arms are arranged close to each other and are hinged by a first hinge, the two second clamp arms are arranged close to each other and are hinged by a second hinge, the hinge axes of the first hinge and the second hinge are coaxially arranged, and the axial direction of the sleeve is parallel to the hinge axes of the first hinge and the second hinge.

7. The derotation correction track device for scoliosis deformity surgery according to claim 6, characterized in that: Baffles are provided at both ends of the sleeve, the clamping ends of the first branch clamp arm and the second branch clamp arm are respectively fixedly connected to the baffles at both ends of the sleeve, and the threaded rod is rotatably arranged between the two baffles.

8. The derotation correction track device for scoliosis deformity surgery according to claim 7, characterized in that: The two ends of the threaded rod are rotatably mounted on two baffles through bearings respectively, and one end of the threaded rod passes through the adjacent baffle and extends to the outside of the sleeve and is fixedly connected to a rotating handle.

9. The derotation correction track device for scoliosis deformity surgery according to claim 7, characterized in that: The two ends of the threaded rod pass through the adjacent baffles and are rotatably mounted on the clamping ends of the first and second branch pliers arms through bearings. One end of the threaded rod passes through the first or second branch pliers arm and is fixedly connected to a rotating handle.

10. The derotation correction track device for scoliosis deformity surgery according to claim 9, characterized in that: The holding rod is rotatably connected between the holding ends of the first branch clamp arm and the second branch clamp arm.

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