Surgical distraction device

Abstract

A surgical distraction device comprises: a rod with a fixed portion at one end; a movable member sleeved over the rod and located away from the fixed portion; and at least one support member, one end of which passes through and is connected to the fixed portion, and the other end of which passes through and is connected to the movable member. The movable member is movable along the length of the rod to move the support member from an initial state to a deformed state. During clinical use, doctors can select the support member of the surgical distraction device based on the individual patient's condition, thereby improving the adaptability of the surgical distraction device.

Description

Technical Field

[0001] Surgical Distraction Device The present invention relates to a surgical distraction device for distracting bones. Background Art

[0002] When vertebrae collapse due to external forces or osteoporosis, surgical treatment with various implants or bone grafts is often performed. When osteoporosis requires additional implant placement, a path is first drilled through the pedicle. A surgical distraction device is then implanted into the vertebral body in an undistracted state. The distraction device is then used to distract the vertebrae. Once the distraction device has been applied, a medical filler such as bone cement is then injected. After the implant is injected, the distraction device, bone cement, and bone are fused.

[0003] The support bodies of existing surgical distraction devices are all integrally formed, which is inconvenient to process and has high costs. In addition, during clinical use, the distraction form is single and cannot adapt to the different conditions of different patients. It may even over-support the patient's bones in certain directions, causing damage to the patient's bones.

[0004] In particular, existing surgical distraction devices provide the same vertical distraction height. However, because the pedicles are located in the upper and posterior part of the vertebral body and are short and thin, placement of the surgical distraction device requires drilling a path through the pedicles before implanting the device into the vertebra. Consequently, the required vertical distraction height within the vertebra varies, and existing surgical distraction devices cannot meet this requirement. Summary of the Invention

[0005] Therefore, an object of the present invention is to provide a surgical distraction device that can adapt to different conditions of different patients.

[0006] Some embodiments of the present invention provide a surgical distraction device, comprising: a rod, one end of which is provided with a fixed portion; a movable member, which is sleeved on the rod and located on a side away from the fixed portion; and at least one support body, one end of which passes through and is connected to the fixed portion, and the other end passes through and is connected to the movable member, the movable member being movable in the length direction of the rod to change the support body from an initial state to a deformed state.

[0007] As can be seen, during manufacturing, the support body, rod, and movable parts of the surgical distraction device can be processed separately, which facilitates cost control and avoids material waste. During clinical use, doctors can select the appropriate support body based on the patient's condition, thereby improving the adaptability of the surgical distraction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional schematic diagram of the surgical distraction device of this embodiment.

[0009] Figure 2 yes Figure 1Schematic diagram of an exploded view of a surgical distraction device.

[0010] 3a to 3d of FIG. 3 illustrate diagrams of some embodiments according to the present invention. Figure 1 A three-dimensional schematic diagram of tools of a surgical distraction device.

[0011] 4a to 4d of FIG. 4 show diagrams according to some embodiments of the present invention. Figure 1 A cross-sectional schematic diagram of the movable parts of a surgical distraction device.

[0012] 5a to 5d of FIG. 5 are diagrams illustrating some embodiments of the present invention. Figure 1 Schematic cross-sectional view of the support body of the surgical distraction device 100.

[0013] 6a to 6d of FIG. 6 illustrate some embodiments according to the present invention. Figure 1 A cross-sectional schematic diagram of a surgical distraction device in a deformed shape.

[0014] 7 a to 7 d are schematic cross-sectional views showing a surgical distraction device in a deformed shape according to another embodiment of the present invention.

[0015] 8 a to 8 b of FIG8 are respectively a perspective schematic diagram and a cross-sectional schematic diagram showing a rod and a propulsion member of the surgical distraction device according to the present invention. DETAILED DESCRIPTION

[0016] Embodiments of the present invention will now be described with reference to the accompanying drawings, wherein like reference numerals are used to refer to like elements throughout the drawings. It will be understood that the drawings are not necessarily drawn to scale.

[0017] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0018] Figure 1 is a schematic three-dimensional diagram of a surgical distraction device 100 according to some embodiments of the present invention. Figure 2 yes Figure 1 Schematic diagram of the surgical distraction device 100. Figure 1 As shown, the present invention provides a surgical distraction device 100 , which includes a rod 110 , a propulsion member 120 , a movable member 130 , a first support body 140 and a second support body 150 .

[0019] Rod 110 includes a rod body 160 and a fixing portion 170. Fixing portion 170 is fixedly connected to one end of rod body 160, or rod body 160 and fixing portion 170 are integrally formed. Fixing portion 170 is wider than rod body 160. Rod body 160 has a threaded end 180 and an unthreaded end 190 connected thereto. Threaded end 180 is further away from fixing portion 170 than unthreaded end 190.

[0020] The rod body 160 is tubular and has a plurality of through holes 160a formed therein, each of which extends through the sidewall of the rod body 160. In other words, the through holes 160a are connected to a pipe within the rod body 160. Medical fillers such as bone cement can flow out of the through holes 160a through the pipe. In some embodiments, the through holes 160a are formed on both the threaded end 180 and the unthreaded end 190. In other embodiments, the through holes 160a are formed on one of the threaded end 180 and the unthreaded end 190. In this exemplary embodiment, the fixing portion 170 is integral with the rod body 160. In other words, the rod body 160 and the fixing portion 170 are formed as one piece.

[0021] At least one of the rod 110, the propulsion member 120, the movable member 130, the first support 140, and the second support 150 is made of a medical-grade material, such as titanium, stainless steel, any suitable medical-grade material, or a combination thereof. Each of the rod 110, the propulsion member 120, the movable member 130, the first support 140, and the second support 150 can also be made of a different medical-grade material.

[0022] The pusher 120 is threaded and is threadedly connected to the threaded end 180 of the rod body 160. In the present exemplary embodiment, the pusher 120 has a polygonal cross-section, such as a hexagonal cross-section. It should be understood that other shapes are also considered to be within the scope of the present invention, including, for example, circular, square, rectangular or other polygonal shapes.

[0023] The movable member 130 has a through hole 270. The rod body 160 is inserted into the through hole 270. In other words, the movable member 130 is sleeved outside the rod body 160. The movable member 130 is located between the propulsion member 120 and the fixed portion 170. The movable member 130 can move along the length direction of the rod body 160.

[0024] The first support body 140 is generally in the shape of an elongated strip. The first support body 140 includes a first connecting structure 140a, a second connecting structure 140b, and a deformable member 140c. The deformable member 140c of the first support body 140 connects the first connecting structure 140a and the second connecting structure 140b of the first support body 140 to each other and can be transformed from an initial shape to a deformed shape as described in further detail below.

[0025] Figure 2 is a diagram showing some embodiments according to the present invention Figure 1 Schematic diagram of the surgical distraction device 100. Figure 2 As shown, the first support body 140 includes a first connecting structure 140a, which includes an abutting member 220a and a protruding member 220b connected to each other. A connecting hole 210a is defined in the fixing portion 170. The protruding member 220b passes through the connecting hole 210a, positioning the fixing portion 170 between the abutting member 220a and the protruding member 220b. The protruding member 220b abuts the fixing portion 170 against the abutting member 220a, thereby connecting the first support body 140 to the fixing portion 170.

[0026] Further Figure 2 As shown, the second connection structure 140b of the first support body 140 includes an abutment member 250a and a protruding member 250b. A connection hole 240a is provided on the movable member 130. The first support body 140 is configured to pass through the connection hole 240a on the movable member 130 so that the movable member 130 is located between the abutment member 250a and the protruding member 250b of the second connection structure 140b of the first support body 140, and so that the protruding member 250b of the second connection structure 140b of the first support body 140 abuts the movable member 130 against the abutment member 250a of the second connection structure 140b of the first support body 140, thereby connecting the first support body 140 to the movable member 130.

[0027] In an exemplary embodiment, the thickness of the protruding member 220b gradually decreases in a direction away from the abutting member 220a, that is, the protruding member 220b is shaped like an "arrow". In some embodiments, the thickness of the protruding member 250b gradually decreases in a direction away from the abutting member 250a, that is, the protruding member 250b is shaped like an "arrow". In some embodiments, after the protruding member 220b of the first connecting structure 140a passes through the connecting hole 210a and the protruding member 250b of the second connecting structure 140b passes through the connecting hole 240a on the movable part 130, the rod 110, the movable part 130 and the first support body 140 are engaged together. Since the protruding member 220b is in the shape of an "arrow", it is prevented from exiting by the fixing portion 170 after passing through the connecting hole 210a, that is, it cannot be detached from the connecting hole 210a. Similarly, the protruding member 250b is in the shape of an "arrow", and is prevented from exiting by the movable part 130 after passing through the connecting hole 240a, that is, it cannot be detached from the connecting hole 240a without the application of other external force. The engagement stability of the rod 110, the movable part 130 and the first support body 140 is improved, making the surgical distraction device more stable in the bone and less likely to fail.

[0028] The first connecting structure 150a of the second support body 150 includes an abutting member 230a and a protruding member 230b. A connecting hole 210b is formed in the fixing portion 170. In this exemplary embodiment, the connecting hole 210a and the connecting hole 210b are arranged opposite each other. The first connecting structure 150a extends through the connecting hole 210b, so that the fixing portion 170 is located between the abutting member 230a and the protruding member 230b of the first connecting structure 150a of the second support body 150. The protruding member 230b of the first connecting structure 150a of the second support body 150 abuts the fixing portion 170 against the abutting member 230a of the first connecting structure 150a of the second support body 150, thereby connecting the second support body 150 to the fixing portion 170.

[0029] The second connection structure 150b of the second support body 150 includes an abutment member 260a and a protruding member 260b. A connection hole 240b is provided on the movable member 130. In this exemplary embodiment, the connection hole 240a and the connection hole 240b are arranged relative to each other. The second support body 150 is configured to pass through the connection hole 240b on the movable member 130 so that the movable member 130 is located between the abutment member 260a and the protruding member 260b of the second connection structure 150b of the second support body 150, and so that the protruding member 260b of the second connection structure 150b of the second support body 150 abuts the movable member 130 against the abutment member 260a of the second connection structure 150b of the second support body 150, thereby connecting the second support body 150 to the movable member 130.

[0030] In other embodiments, the first support 140 and the second support 150 are detachably connected to the movable member 130 and the fixed portion 170, respectively. Specifically, the deformable member 140c of the first support 140 is detachably connected to the fixed portion 170 via the first connecting structure 140a of the first support 140. This allows the first support 140 and the fixed portion 170 to be separated from each other without damaging the deformable member 140c and / or the fixed portion 170. The deformable member 140c of the first support 140 is further detachably connected to the movable member 130 via the second connecting structure 140b of the first support 140. This allows the first support 140 and the movable member 130 to be separated from each other without damaging the deformable member 140c and / or the movable member 130. The second support 150 is generally elongated and includes a first connecting structure 150a, a second connecting structure 150b, and a deformable member 150c. The deformable member 150c of the second support 150 interconnects the first connecting structure 150a and the second connecting structure 150b of the second support 150 and, as will be described in further detail below, can be transformed from an initial shape to a deformed shape. The deformable member 150c of the second support 150 is detachably connected to the fixed portion 170 via the first connecting structure 150a of the second support 150. That is, the second support 150 and the fixed portion 170 can be separated from each other without damaging the deformable member 150c of the second support 150 and / or the fixed portion 170. The deformable member 150c of the second support 150 is further detachably connected to the movable member 130 via the second connecting structure 150b of the second support 150. That is, the second support 150 and the movable member 130 can be separated from each other without damaging the deformable member 150c of the second support 150 and / or the movable member 130.

[0031] When assembling the surgical distraction device 100, please refer to Figure 1 and 2 First, the first support 140 is connected to the movable member 130 via the second connecting structure 140b. During this process, the protruding member 250b of the second connecting structure 140b of the first support 140 deforms and then returns to its original shape. Then, the second support 150 is connected to the movable member 130 via the second connecting structure 150b. During this process, the protruding member 260b of the second connecting structure 150b of the second support 150 deforms and then returns to its original shape. Subsequently, the movable member 130 is fitted onto the rod body 160.

[0032] Next, the first support 140 is connected to the fixed portion 170 via the first connecting structure 140a. During this process, the protruding member 220b of the first connecting structure 140a of the first support 140 deforms and then returns to its original shape. Thereafter, the second support 150 is connected to the fixed portion 170 via the first connecting structure 150a. During this process, the protruding member 230b of the first connecting structure 150a of the second support 150 deforms and then returns to its original shape. Finally, the pusher 120 is threadedly connected to the threaded end 180 of the rod body 160.

[0033] Figures 3a to 3d is a diagram showing some embodiments according to the present invention Figure 1 Schematic diagram of the tool of the surgical distraction device 100. In this exemplary embodiment, the surgical distraction device 100 further includes a tool 310, which is configured to connect with the pusher 120 and rotate the pusher 120, so that the pusher 120 is spirally fed along the length direction of the rod body 160 toward the fixing portion 170 to deform the deformable members 140c and 150c from the initial shape (such as Figure 3a ) to a deformed shape (as shown in Figure 3b ). The lengths of the threaded end portion 180 and the unthreaded end portion 190 of the rod body 160 can be pre-set. It will be appreciated that the final position of the movable member 130 relative to the fixed portion 170 determines the degree of deformation of the deformable members 140 c and 150. The position of the intersection of the unthreaded end portion 190 and the threaded end portion 180 limits the movable member 130 from extending beyond the threaded end portion 180, thereby determining the maximum degree of deformation of the deformable members 140 c and 150 c.

[0034] In this exemplary embodiment, Figure 3a As shown, the tool 310 is T-shaped and includes a first portion 320 and a second portion 330 having an end connected to the middle of the first portion 320. The first portion 320 has a through tool channel (not shown) formed therein.

[0035] The second portion 330 of the tool 310 is tubular and has a polygonal cross-section, such as a hexagonal cross-section. It should be understood that other shapes are also within the scope of the present invention, including, for example, square, rectangular or other polygonal shapes.

[0036] When in use, the surgical distraction device 100 (excluding the tool 310) is first inserted into an object (e.g., a bone). Then, the tool 310 is mounted to the pusher 120, such as Figure 3a Alternatively, the tool 310 may be mounted on the pusher 120 before the surgical distraction device 100 is inserted into an object (eg, a bone, a vertebral body, or an intervertebral disc).

[0037] In this embodiment, a locking hole 120a is defined in the pusher 120, and a locking ball, an ejection mechanism, and a separation mechanism (not shown) are provided on the second tool portion 330 of the tool 310. After the second tool portion 330 is inserted into the pusher 120, the ejection mechanism engages the locking ball in the corresponding locking hole 120a, thereby causing the second tool portion 330 to rotate. To separate the tool 310 from the pusher 120, the separation mechanism ejects the locking ball from the corresponding locking hole 120a. The tool 310 can then be withdrawn away from the pusher 120 to separate the tool 310 from the pusher 120. In other embodiments, the locking hole may be defined in the second tool portion 330, and the locking ball and ejection mechanism may be provided on the pusher 120. Alternatively, the ejection mechanism engages the locking ball in the corresponding locking hole 120a after the second tool portion 330 is inserted into the pusher 120. In other embodiments, the present invention is not limited thereto, as long as the second tool portion 330 can be installed with the pusher 120 and drive the pusher 120 to move toward the fixing portion 170 , and can also be separated from the pusher 120 .

[0038] Subsequently, the tool 310 is rotated so that the pusher 120 moves along the length direction of the rod body 160 toward the fixed portion 170. During this period, the pusher 120 pushes the movable member 130 along the length direction of the rod body 160 toward the fixed portion 170. Therefore, the deformable members 140c and 150c are deformed from their initial shapes (such as Figure 3a ) into a deformed shape (as shown in Figure 3b ). At this point, the threaded end 180 of the rod body 160 can extend into the second tool portion 330 of the tool 310. The rotation of the tool 310 is stopped until the deformable members 140c and 150c change from their initial shapes to their predetermined deformed shapes. It will be appreciated that if the position of the pusher 120 exceeds the predetermined position, meaning that the pusher 120 is too close to the fixing portion 170, the tool 310 can be rotated in the opposite direction to adjust the pusher 120 away from the fixing portion 170, thereby causing the deformable members 140c and 150c to deform back to their initial shapes.

[0039] Afterwards, if Figure 3cAs shown, instrument 350 can be used to inject bone cement into a subject via tool 310 and rod body 160. In an exemplary embodiment, instrument 350 is a bone cement syringe having an inner cavity for accommodating bone cement. Furthermore, the inner cavity of the bone cement syringe communicates with a channel within tool 310. The inner channel of tool 310 communicates with a channel within pusher 120, which in turn communicates with a conduit within rod body 160. Thus, bone cement within the inner cavity of the bone cement syringe can sequentially pass through the inner channel of tool 310, the inner channel of pusher 120, and the conduit within rod body 160, and be injected into the subject through through-hole 160a of rod body 160. After a predetermined amount of bone cement has been injected, tool 310 is separated from pusher 120, and the portion of surgical distraction device 100 excluding tool 310 is left in the subject.

[0040] Although the tool 310 of the surgical distraction device 100 is illustrated as being in a "T" shape, in alternative embodiments, the tool 310 of the surgical distraction device 100 may be in other shapes. For example, in some embodiments, the tool 310 of the surgical distraction device 100 is in an "L" shape. In other embodiments, the tool 310 of the surgical distraction device 100 is in a rod shape. In such other embodiments, Figure 3d As shown, the end of the tool 310 can be gripped and rotated by an instrument 370. The instrument 370 can be specifically a manipulator, and the movement of the manipulator can be precisely controlled by a program. One end of the tool 310 is connected to the pusher 120, and the other end is gripped by the manipulator.

[0041] Figures 4a to 4d is a diagram showing some embodiments according to the present invention Figure 1 Although the movable member 130 of the surgical expansion device 100 is illustrated as having a pair of connection holes, for example, Figure 4a The first connecting hole 240a and the second connecting hole 240b are shown. After reading this disclosure, those skilled in the art will appreciate that the number of connecting holes in the surgical distraction device 100 can be reduced or increased as needed. The connecting holes can be arranged at different angles as needed, thereby allowing the support body to be positioned at various angles to achieve various distraction effects. In alternative embodiments, for example, Figure 4c The movable member 410 shown may be formed with three connection holes 410a, 410b, 410c therethrough. In this alternative embodiment, the surgical distraction device 100 accordingly has three support bodies.

[0042] In some embodiments, as Figure 4bAs shown, the movable member 420 may be formed with four connecting holes 420a to 420d passing therethrough. In some such embodiments, the surgical distraction device 100 has four supporting bodies accordingly. In other embodiments, such as Figure 4d As shown, the movable member 430 may be formed with a connecting hole 430a passing therethrough. In such other embodiments, the surgical distraction device 100 correspondingly has a supporting body.

[0043] Figures 5a to 5d is a diagram showing some embodiments according to the present invention Figure 1 Schematic cross-sectional view of the support body of the surgical distraction device 100. In this exemplary embodiment, the deformable members (e.g., deformable members 140c, 150c) of the support body (e.g., support bodies 140, 150) of the surgical distraction device 100 have uneven thickness in the longitudinal direction. For example, Figure 5a As shown, the deformable member 510 includes a first end portion 520 and a second end portion 530 connected to each other. The thickness of the first end portion 520 is TH3, and the thickness of the second end portion 530 is TH4. The thickness TH4 of the second end portion 530 is greater than the thickness TH3 of the first end portion 520. In some embodiments, as Figure 5a As shown, the second end 530 of the deformable member 510 is solid. In other embodiments, such as Figure 5d As shown, the second end 530 of the deformable member 510 is hollow.

[0044] In some embodiments, the deformable member has a thickness that gradually increases or decreases from the first connecting structure (e.g., first connecting structures 140a, 150a) to the second connecting structure (e.g., second connecting structures 140b, 150b). In some embodiments, the deformable member has a hollowness that gradually increases or decreases from the first connecting structure (e.g., first connecting structures 140a, 150a) to the second connecting structure (e.g., second connecting structures 140b, 150b). In some embodiments, the deformable member has a thickness that varies arbitrarily from the first connecting structure (e.g., first connecting structures 140a, 150a) to the second connecting structure (e.g., second connecting structures 140b, 150b). In some embodiments, the deformable member has a hollowness that varies arbitrarily from the first connecting structure (e.g., first connecting structures 140a, 150a) to the second connecting structure (e.g., second connecting structures 140b, 150b). Thus, the deformable member 510 can have different deformability along its length.

[0045] In an alternative embodiment, the deformable member has a substantially uniform thickness. Figure 5cAs shown, the second end portion 530 of the deformable member 510 has substantially the same thickness as the first end portion 520 of the deformable member 510. In some embodiments, as shown in FIG. Figure 5c As shown, the first end 520 and the second end 530 of the deformable member 510 are solid. In other embodiments, such as Figure 5b As shown, the first end 520 and the second end 530 of the deformable member 510 are hollow.

[0046] In some embodiments, the first end 520 and second end 530 of the deformable member 510 have different properties, such as elastic modulus, thereby enabling different deformation capabilities between the first end 520 and the second end 530 of the deformable member 510, thereby enabling asymmetrical deformation. In some embodiments, the deformable member has different properties, such as elastic modulus, along the length direction from the first connecting structure (e.g., first connecting structures 140a, 150a) to the second connecting structure (e.g., second connecting structures 140b, 150b), thereby enabling different deformation capabilities of the deformable member 510 along the length direction.

[0047] In addition, if Figure 5a As shown, the thickness TH2 of the second connection structures 140b and 150b is greater than the thickness TH1 of the first connection structures 140a and 150a.

[0048] Figures 6a to 6d Some embodiments according to the present invention are shown Figure 1 Schematic cross-sectional view of the surgical distraction device 100 in a deformed state. Figures 7a to 7d FIG. 1 is a diagram showing a deformed shape according to another embodiment of the present invention. Figure 1 Schematic cross-sectional view of the state of the surgical expansion device 100. In some embodiments, the surgical expansion device 100 has first and second support bodies 640 and 650 with the same configuration as each other. For example, each of the first support body 640 and the second support body 650 can have Figures 5a to 5d Thus, when the deformable members 640c and 650c of the first support 640 and the second support 650 move from the initial shape to the deformed shape, the deformable members 640c and 650c may have a shape that is substantially symmetrical with respect to the rod body 660, as shown in FIG. Figures 6a to 6d shown.

[0049] In other embodiments, the surgical distraction device 100 has a first support 740 and a second support 750 with different configurations. For example, the first support 740 may have Figures 5a to 5d , and the second support 750 may have Figures 5a to 5dThus, when the deformable members 740c, 750c of the first and second supports 740, 750 move from the initial shape to the deformed shape, the deformable members 740c, 750c may have different shapes or curvatures, such as Figures 7a-7d shown.

[0050] In this exemplary embodiment, the pusher 120 may be a nut and the rod body 160 may be a bolt, but this is not limited thereto. In other embodiments, for example, Figure 8a and Figure 8b As shown, the rod body 860 has a first end 880 and a second end 890 located between the first end 880 and the fixing portion 870. The first end 880 of the rod body 860 has a plurality of bolt teeth 800, each of which has an edge 800a substantially perpendicular to the length of the rod body 860. Figure 8b As shown, unlike the internal thread, the pushing member 820 has an internal protrusion 820a configured to engage with the edge 800a of the bolt tooth 800. The second end portion 890 of the lever body 860 is not provided with a bolt tooth.

[0051] It is understood that in clinical use, doctors can choose combinations of supports with different numbers, lengths, shapes, deformed shapes, etc. according to the different conditions of different patients, and can set the supports at different angles. For example, Figure 7d The deformed shapes of the deformable components 740c and 750c of the support bodies 740 and 750 are particularly suitable for the situation where the surgical distraction device 100 is implanted into the vertebra from the pedicle. In this case, since the pedicle is located in the posterior and superior part of the vertebral body, the deformable component below requires a greater degree of deformation, and the deformable component above requires a smaller degree of deformation.

[0052] Therefore, the surgical distraction device 100 of the present invention offers a higher degree of adaptability than existing distractors, preventing both under-support and over-support, which could lead to stress concentration and damage to the patient's bones. During manufacturing, the support body, rods, and movable parts of the surgical distraction device 100 can be fabricated separately, facilitating cost control and minimizing material waste.

[0053] Although the present invention has been shown and described with respect to one or more embodiments, it is apparent that equivalent changes and modifications will occur to others skilled in the art after reading and understanding this specification and the accompanying drawings. In particular, with respect to the various functions performed by the above-mentioned elements (components, assemblies, devices, combinations, etc.), unless otherwise indicated, the terms used to describe such elements are intended to correspond to any element that performs the specified function of the described element (i.e., is functionally equivalent), although the element is not structurally equivalent to the invented structure that performs the function of one or more exemplary embodiments of the present invention described herein. In addition, although the above may describe specific features of the present invention with respect to only one or more of several illustrated embodiments, such features may be combined with one or more other features of other embodiments where it may be desirable and advantageous for any given or particular application.

Claims

1. A surgical distraction device, characterized in that: include: a rod having a fixing portion at one end thereof; a movable member, sleeved on the rod and located on a side away from the fixed portion; as well as at least one supporting body detachably assembled between the movable member and the fixed portion, wherein one end of the supporting body can pass through and be connected to the fixed portion, and the other end of the supporting body can pass through and be connected to the movable member; a first connecting structure located at the one end of the supporting body, the first connecting structure comprising a first abutting member and a first protruding member connected to each other, the first protruding member being configured to pass through a connecting hole provided in the fixing portion, such that the fixing portion is located between the first abutting member and the first protruding member and the fixing portion abuts against the first abutting member, and a thickness of the first protruding member gradually decreasing in a direction away from the first abutting member; as well as a second connecting structure located at the other end of the supporting body, the second connecting structure comprising a second abutting member and a second protruding member connected to each other, the second protruding member being configured to pass through a connecting hole provided in the movable member, so that the movable member is located between the second abutting member and the second protruding member and abuts against the second abutting member, the thickness of the second protruding member gradually decreasing in a direction away from the second abutting member; The movable member is movable in the length direction of the rod member so as to change the supporting body from an initial state to a deformed state.

2. The surgical distraction device according to claim 1, characterized in that: It also includes a propulsion member, which is sleeved on the rod and configured to push the movable member along the length direction of the rod.

3. The surgical distraction device according to claim 1, characterized in that: It also includes a connecting structure configured to connect the support body to the movable part, the connecting structure including a pair of protruding members located at one end of the support body, a connecting hole is opened on the movable part, and the movable part is located between the pair of protruding members when one end of the support body passes through the connecting hole.

4. The surgical distraction device according to claim 1, characterized in that: It also includes a connecting structure configured to connect the support body to the fixing portion of the rod, the connecting structure including a pair of protruding members located at one end of the support body, a connecting hole being provided on the fixing portion, and the fixing portion being located between the pair of protruding members when one end of the support body passes through the connecting hole.

5. The surgical distraction device according to claim 1, characterized in that: The support body includes a first end and a second end, and the thickness of the second end is greater than the thickness of the first end.

6. The surgical distraction device according to claim 1, characterized in that: Also includes a first connecting structure, capable of connecting the supporting body to the fixing portion; as well as The second connecting structure can connect the supporting body to the movable member, and the thickness of the second connecting structure is greater than that of the first connecting structure.

7. The surgical distraction device according to claim 1, characterized in that: It also includes a propulsion member, which has a thread inside, and the rod is correspondingly provided with a thread. The propulsion member is threadedly connected to the rod and pushes the movable member along the length direction of the rod.

8. The surgical distraction device according to claim 1, characterized in that: The rod is tubular, a pipe is provided in the rod body, and a plurality of through holes are formed on the rod, and the through holes penetrate through the side wall of the rod.

9. The surgical distraction device according to claim 8, characterized in that: It also includes a propulsion member, which is sleeved on the rod and pushes the movable member along the length direction of the rod; and A tool is provided, wherein the tool can move the pushing member along the length direction of the rod.

10. The surgical distraction device according to claim 9, characterized in that: The tool is tubular and communicates with the rod.

11. The surgical distraction device according to claim 1, characterized in that: The support body is hollow.

12. A surgical distraction device, characterized in that: include: a rod having a fixing portion at one end thereof; a movable member, sleeved on the rod and located on a side away from the fixed portion, with a connecting hole formed on the movable member; at least one supporting body detachably assembled between the movable member and the fixed portion, one end of the supporting body passing through and connected to the fixed portion, and the other end of the supporting body passing through and connected to the movable member, the movable member being movable in the longitudinal direction of the rod member so as to change the supporting body from an initial state to a deformed state; as well as A connecting structure is located at the other end of the supporting body and is configured to connect the supporting body to the movable part. The connecting structure includes an abutting member and a protruding member connected to each other. The protruding member is configured to pass through the connecting hole of the movable part so that the movable part is located between the abutting member and the protruding member and the movable part abuts against the abutting member. The thickness of the protruding member gradually decreases in the direction away from the abutting member.

13. The surgical distraction device according to claim 12, characterized in that: It also includes a propulsion member, which is sleeved on the rod and configured to push the movable member along the length direction of the rod.

14. The surgical distraction device according to claim 12, wherein: The rod has a threaded end portion and a non-threaded end portion between the threaded end portion and the fixing portion.

15. The surgical distraction device according to claim 12, wherein: It also includes a propulsion member, which has a thread inside, and the rod is correspondingly provided with a thread. The propulsion member is threadedly connected to the rod and pushes the movable member along the length direction of the rod.

16. The surgical distraction device according to claim 12, wherein: The rod is tubular, and a pipe is provided in the rod body.

17. A surgical distraction device, characterized in that: include: A rod, one end of which is provided with a fixing portion, and the fixing portion is provided with a connecting hole; a movable member, sleeved on the rod and located on a side away from the fixed portion; at least one supporting body detachably assembled between the movable member and the fixed portion, one end of the supporting body passing through and connected to the fixed portion, and the other end of the supporting body passing through and connected to the movable member, the movable member being movable in the longitudinal direction of the rod member so as to change the supporting body from an initial state to a deformed state; as well as A connecting structure is located at one end of the supporting body and is configured to connect the supporting body to the fixing portion. The connecting structure includes an abutting member and a protruding member connected to each other. The protruding member is configured to pass through the connecting hole of the fixing portion so that the fixing portion is located between the abutting member and the protruding member and the fixing portion abuts against the abutting member. The thickness of the protruding member gradually decreases in a direction away from the abutting member.

18. The surgical distraction device according to claim 17, wherein: The rod is provided with a plurality of bolt teeth, and each of the bolt teeth has an edge that forms a right angle with the length direction of the rod.

19. The surgical distraction device according to claim 18, wherein: The rod has a first end portion formed with bolt teeth and a second end portion between the first end portion and the fixing portion, the second end portion not having the bolt teeth formed thereon.

20. The surgical distraction device according to claim 18, wherein: Also included is a pusher having an inner protrusion configured to engage the edge of the bolt tooth.

Images