Quick-change type tool for hip replacement surgery

Abstract

The invention relates to a quick-change type tool for hip replacement surgery. The quick-change type tool comprises a handheld part, an extension part, a transmission part, a connecting mechanism, an acetabulum file and an acetabulum test mold, the transmission part comprises a pivot, a connecting transmission rod and a plurality of bending transmission rods which are connected in sequence; a connector is arranged at the free end of the connecting transmission rod, and a bearing head is arranged on the periphery of the connecting transmission rod; the connecting mechanism comprises a first connecting hole; the acetabulum file is connected with the connecting mechanism; and a second connecting hole is formed in the acetabulum test mold. The pivot and the connecting transmission rod are rotatably mounted at the two ends of the extension part, and the middle of the extension part is connected through the bending transmission rods, so that bending transmission is realized, and the extension part can be used for lateral approach total hip joint surgery; the connecting head connected with the end of the transmission rod can be provided with a connecting mechanism and is quickly connected with the acetabulum file, the acetabulum file can be quickly rotated by using an electric tool, and the grinding operation of the acetabular fossa is realized; meanwhile, the connector connected with the end of the transmission rod can also be connected with an acetabulum test mold, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a quick-change tool for hip replacement surgery. Background Art

[0002] Hip replacement refers to a prosthesis similar to human bone joints made of metal materials with good biocompatibility and mechanical properties. The artificial joint is surgically replaced with the joint surface damaged by disease or injury. Its purpose is to remove the lesion, eliminate pain, restore joint activity and original function, and reconstruct or restore the normal function of the hip joint. It is a relatively mature and reliable treatment method.

[0003] During hip replacement surgery, an acetabular rasp is first used to file away damaged tissue at the site of injury before replacing the prosthesis.

[0004] Because the sizes of different human bones are different, the sizes of the hip socket and femoral head are also different. The femoral articular surface accounts for 2 / 3 of the head area and is embedded in the acetabulum. The lunar surface of the acetabulum surrounds the acetabulum socket, which is filled with fat. The acetabulum socket needs to be polished before replacement, and then the acetabulum trial mold is used for testing, so as to reasonably select the prosthesis that matches the acetabulum socket for implantation. In actual technology, the acetabulum rasp is used to file away the damaged tissue, and then the acetabulum trial mold is used for testing. In order to facilitate the acetabulum, a large surgical incision must be made. A large surgical incision is easy to damage other healthy tissues during the incision for the patient, causing great damage and a greater risk of infection. At the same time, it takes longer to recover.

[0005] At present, the surgical tools used are straight, and the posterior approach total hip replacement surgery has a large surgical wound. With the introduction of the concept of minimally invasive surgery, the lateral approach total hip surgery has a tendency to gradually replace the posterior approach total hip surgery. The lateral approach total hip surgery has the advantages of reducing body damage and shortening postoperative recovery time. Therefore, there is an urgent need for a surgical tool suitable for the lateral approach total hip surgery. Summary of the invention

[0006] The embodiment of the present invention provides a quick-change hip replacement surgery tool to solve the problem that the existing total hip surgery tool is only suitable for posterior approach total hip replacement surgery but not for lateral approach total hip surgery.

[0007] In order to overcome the above technical problems, according to an embodiment of the present invention, a quick-change hip replacement surgery tool is provided, comprising: A handheld portion; the handheld portion includes a handle having a hollow structure; An extension portion; the extension portion is a hollow shell structure having a plurality of bends, and one end of the extension portion is connected to the grip; Transmission part; the transmission part comprises a pivot, a connecting transmission rod and a plurality of bent transmission rods connected in sequence; the pivot is rotatably arranged in the hollow structure of the grip, one end of the pivot enters one end of the extension part, and the connecting transmission rod is rotatably arranged at the other end of the extension part; a plurality of the bent transmission rods are rotatably arranged in the extension part, respectively, and the pivot, the plurality of bent transmission rods and the connecting transmission rod are connected end to end in sequence through a universal joint; a connecting head is arranged at the free end of the connecting transmission rod, and a bearing head is arranged at the periphery of the connecting transmission rod; A connecting mechanism; the connecting mechanism comprises a first connecting hole, and the first connecting hole can be connected to the connecting head; an acetabular rasp; the acetabular rasp being connected to the connecting mechanism; and Acetabular trial mold; a second connecting hole is opened on the acetabular trial mold, and the second connecting hole can be connected to the connecting head, so that the acetabular trial mold is clamped on the bearing head.

[0008] In some embodiments, the connecting mechanism includes a clamping head, a stop sleeve arranged on the clamping head, a movable head movably arranged on the clamping head, and a spring sleeved on the clamping head; the spring is located between the stop sleeve and the movable head to provide elastic force for the movable head; the first connecting hole is opened at one end of the clamping head, and a plurality of waist-shaped holes are arranged at the other end of the clamping head, each of the waist-shaped holes is open on one side, and the clamping head is correspondingly provided with a stop hole at the opening position, and a plurality of stop rods are arranged on the movable head, the stop rods correspond to the stop holes one by one, and the stop rods can be inserted into the stop holes; A fixing rod is arranged in the acetabular rasp, and the fixing rod can enter the waist-shaped hole from the opening.

[0009] In some embodiments, the number of the waist-shaped holes is four, the number of the locking holes and the locking rods are also four respectively, and they are all evenly arranged along the circumferential direction; the fixing rod is cross-shaped, and each end of the fixing rod enters from the opening of each waist-shaped hole and rotates to reach the inside of the waist-shaped hole.

[0010] In some embodiments, the number of the bent transmission rods is an odd number, and the pivot is parallel to the connecting transmission rod.

[0011] In some embodiments, the number of the bent transmission rods is three.

[0012] In some embodiments, the pivot is rotatably disposed in the hollow structure of the gripping handle via a bearing, and the connecting transmission rod is rotatably disposed inside the end of the extension portion via a bearing.

[0013] In some embodiments, a bearing is provided between at least the middle bent transmission rod among the three bent transmission rods and the extension portion.

[0014] In some embodiments, the connection structure of the connector is an external thread, and the connection structure of the first connection hole and the second connection hole is an internal thread.

[0015] In some embodiments, the handheld portion further comprises an operating lever, wherein the operating lever is hinged on the gripping handle and is used for braking the pivot.

[0016] In some embodiments, the universal joint is connected to the pivot, the connecting transmission rod or the bent transmission rod through two half pins respectively, one end of the half pin is interference fit with the pivot, the connecting transmission rod or the bent transmission rod, and the other end is clearance fit with the universal joint.

[0017] The technical solution provided by the embodiments of the present invention may have the following beneficial effects: The present invention realizes bending transmission by rotatably installing pivots and connecting transmission rods at both ends of the extension part, and connecting them through multiple bent transmission rods in the middle, so that the extension part can be used for lateral approach total hip joint surgery; the connecting head connected to the end of the transmission rod can be installed with a connecting mechanism, which can be quickly connected to the acetabular rasp through the connecting mechanism, and the acetabular rasp can be quickly rotated using an electric tool to realize the grinding operation of the acetabular socket; at the same time, the connecting head connected to the end of the transmission rod can also be connected to the acetabular trial mold, which is convenient and quick.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] Figure 1 The present invention is a schematic diagram of a quick-change hip replacement surgery tool installation acetabulum trial mold structure according to an exemplary embodiment.

[0021] Figure 2 It is an exploded view of a acetabulum trial mold structure installed with tools for quick-change hip replacement surgery according to an exemplary embodiment.

[0022] Figure 3 It is a cross-sectional view of a tool for quick-change hip replacement surgery after removing a connecting mechanism, an acetabular rasp and an acetabular trial mold according to an exemplary embodiment.

[0023] Figure 4 The figure is a schematic diagram of a universal joint structure of a quick-change hip replacement surgery tool according to an exemplary embodiment.

[0024] Figure 5It is an exploded view of an acetabular rasp and a connecting mechanism of a quick-change hip replacement surgical tool according to an exemplary embodiment.

[0025] Figure 6 The present invention is a schematic diagram showing the connection between an acetabular rasp and a connecting mechanism of a quick-change hip replacement surgery tool according to an exemplary embodiment.

[0026] Figure 7 The present invention is a cross-sectional view of an acetabular rasp and a connecting mechanism of a quick-change hip replacement surgery tool according to an exemplary embodiment.

[0027] Figure 8 The present invention is a cross-sectional view of an acetabulum trial mold of a tool for quick-change hip replacement surgery according to an exemplary embodiment.

[0028] Fig. 9 The present invention is a schematic diagram showing the connection between an acetabulum trial mold and a connector of a tool for quick-change hip replacement surgery according to an exemplary embodiment.

[0029] Fig.10 The present invention is a schematic diagram showing the connection between an acetabular rasp, a connecting mechanism and a connecting head of a tool for quick-change hip replacement surgery according to an exemplary embodiment.

[0030] In the figure, 1, hand-held part; 101, grip; 102, operating rod; 2. Extension; 3. Transmission part; 301. Pivot; 302. Connecting transmission rod; 303. Bending transmission rod; 304. Universal joint; 305. Connecting head; 306. Bearing head; 307. Half pin; 4. Connecting mechanism; 401. First connecting hole; 402. Clamp; 403. Stop sleeve; 404. Movable head; 405. Spring; 406. Waist-shaped hole; 407. Opening; 408. Stop hole; 409. Stop rod; 5. Acetabular rasp; 501. Fixing rod; 6. Acetabular trial mold; 601. Second connecting hole. DETAILED DESCRIPTION

[0031] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term 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, it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1-10 As shown, the present invention provides a quick-change hip replacement surgery tool, and some specific embodiments are described below, including a handheld portion 1, an extension portion 2, a transmission portion 3, a connecting mechanism 4, an acetabular rasp 5, and an acetabular trial mold 6. The handheld portion 1 is connected to the extension portion 2, and the handheld portion 1 and the extension portion 2 are both hollow structures, with a transmission portion 3 inside, and the transmission portion 3 can be driven by an external electric tool. The connecting mechanism 4 can be installed at the end of the transmission portion 3, and the acetabular rasp 5 is installed through the connecting mechanism 4. The rotation of the transmission portion 3 drives the acetabular rasp 5 to rotate and perform a grinding and molding operation on the acetabular fossa. The connecting mechanism 4 and the acetabular rasp 5 are removed, and the acetabular trial mold 6 can be installed at the end of the transmission portion 3, and then the acetabular cup model is selected.

[0035] In some specific embodiments, the handheld portion 1 includes a gripping handle 101 having a hollow structure for manual gripping by a surgeon. The extension portion 2 is a hollow shell structure having multiple bends, and one end of the extension portion 2 is connected to the gripping handle 101, so that surgery can be performed by bypassing a smaller surgical incision. The transmission portion 3 includes a pivot 301, a connecting transmission rod 302, and a plurality of sequentially connected bending transmission rods 303. The pivot 301 is rotatably arranged in the hollow structure of the gripping handle 101 through a bearing, one end of the pivot 301 enters one end of the extension portion 2, and the connecting transmission rod 302 is rotatably arranged inside the other end of the extension portion 2 through a bearing. The plurality of bending transmission rods 303 are rotatably installed in the extension portion 2, respectively, and the pivot 301, the plurality of bending transmission rods 303, and the connecting transmission rod 302 are sequentially connected end to end through a universal joint 304, so that the pivot 301, the plurality of bending transmission rods 303, and the connecting transmission rod 302 can rotate synchronously, and power transmission is realized in the bent extension portion 2. The universal joint 304 is connected to the pivot 301, the connecting transmission rod 302 or the bent transmission rod 303 through two half pins 307 respectively. One end of the half pin 307 is interference fit with the pivot 301, the connecting transmission rod 302 or the bent transmission rod 303, and the other end is clearance fit with the universal joint 304, thereby realizing a universal joint structure with a maximum allowable intersection angle of 30°.

[0036] A connecting head 305 is formed at the free end of the connecting transmission rod 302, and a bearing head 306 is fixed to the outer periphery of the connecting transmission rod 302. The connecting mechanism 4 can be installed on the connecting head 305. Specifically, the connecting mechanism 4 includes a clamping head 402, a stopper sleeve 403 installed on the clamping head 402, a movable head 404 movably installed on the clamping head 402, and a spring 405 sleeved on the clamping head 402. The movable head 404 can move axially along the clamping head 402. The spring 405 is located between the stopper sleeve 403 and the movable head 404 to provide elastic force for the movable head 404. The first connecting hole 401 is opened at one end of the clamping head 402, and the clamping head 402 is connected to the connecting head 305 through the first connecting hole 401. A plurality of waist-shaped holes 406 are provided at the other end of the clamping head 402, each waist-shaped hole 406 has an opening 407 on one side, and a corresponding locking hole 408 is provided at the position of the opening 407 of the clamping head 402. A plurality of locking rods 409 are formed on the movable head 404, and the locking rods 409 correspond to the locking holes 408 one by one, and the locking rods 409 can penetrate into the locking holes 408. A fixing rod 501 is installed in the acetabular rasp 5, and the fixing rod 501 can enter the waist-shaped hole 406 from the opening 407, and the acetabular rasp 5 is connected to the waist-shaped hole 406 of the connecting mechanism 4 through the fixing rod 501.

[0037] In one specific embodiment, there are four waist-shaped holes 406, four stop holes 408 and four stop rods 409, and they are evenly arranged along the circumference. The fixed rod 501 is cross-shaped. When in use, the movable head 404 on the stop rod 409 is first pressed downward to compress the spring 405 so that the stop rod 409 is separated from the stop hole 408. Without the restriction of the stop rod 409, each end of the fixed rod 501 is rotated from the opening 407 of each waist-shaped hole 406 to reach the inside of the waist-shaped hole 406, and then the movable head 404 is released. Under the elastic force of the spring 405, the stop rod 409 re-enters the stop hole 408 to prevent the fixed rod 501 from moving to the side of the opening 407 and separating from the waist-shaped hole 406, thereby completing the connection between the acetabular rasp 5 and the connecting mechanism 4.

[0038] The acetabulum trial mold 6 is provided with a second connection hole 601 , which can be connected to the connection head 305 and enable the acetabulum trial mold 6 to be clamped on the bearing head 306 .

[0039] A specific connection method between the connecting head 305 and the first connecting hole 401 and the second connecting hole 601 is now provided. The connection structure of the connecting head 305 is an external thread, and the connection structure of the first connecting hole 401 and the second connecting hole 601 is an internal thread. The first connecting hole 401 and the second connecting hole 601 are both installed on the connecting head 305 by threaded connection.

[0040] In addition, in some specific embodiments, the number of the bent transmission rods 303 is an odd number, and the pivot 301 is parallel to the connecting transmission rod 302, so as to achieve controllability of the rotation speed and ensure surgical accuracy.

[0041] More specifically, in the present embodiment, the number of the bent transmission rods 303 is three, and a bearing is installed between at least the middle bent transmission rod 303 and the extension portion 2 among the three bent transmission rods 303, so that the second bent transmission rod 303 is supported by the bearing, the first bent transmission rod 303 has a pivot 301 and a second bent transmission rod 303 supported at both ends, and the third bent transmission rod 303 has a connecting transmission rod 302 and a second bent transmission rod 303 supported at both ends, so that the three bent transmission rods 303 can all rotate under support, which can be achieved by only one bearing, which is more economical.

[0042] In addition, in order to make the handheld part 1 more convenient to operate, in other embodiments, in addition to the above technical features, the handheld part 1 also includes an operating rod 102 , which is hinged on the grip 101 and is used to brake the pivot 301 .

[0043] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0044] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A quick-change hip replacement surgery tool, characterized in that: include A handheld portion (1); the handheld portion (1) comprises a gripping handle (101) having a hollow structure; An extension portion (2); the extension portion (2) is a hollow shell structure having a plurality of bends, and one end of the extension portion (2) is connected to the grip (101); A transmission part (3); the transmission part (3) comprises a pivot (301), a connecting transmission rod (302) and a plurality of sequentially connected bent transmission rods (303); the pivot (301) is rotatably arranged in the hollow structure of the grip (101), one end of the pivot (301) enters one end of the extension part (2), and the connecting transmission rod (302) is rotatably arranged at the other end of the extension part (2); the plurality of bent transmission rods (303) are rotatably arranged in the extension part (2), respectively, and the pivot (301), the plurality of bent transmission rods (303) and the connecting transmission rod (302) are sequentially connected end to end via a universal joint (304); a connecting head (305) is arranged at the free end of the connecting transmission rod (302), and a bearing head (306) is arranged at the periphery of the connecting transmission rod (302); A connecting mechanism (4); the connecting mechanism (4) comprises a first connecting hole (401), and the first connecting hole (401) can be connected to the connecting head (305); An acetabular rasp (5); the acetabular rasp (5) is connected to the connecting mechanism (4); and An acetabulum trial mold (6); a second connection hole (601) is provided on the acetabulum trial mold (6), and the second connection hole (601) can be connected to the connection head (305) so that the acetabulum trial mold (6) is clamped on the bearing head (306).

2. The quick-change hip replacement surgical tool according to claim 1, characterized in that: The connecting mechanism (4) comprises a clamping head (402), a stopper sleeve (403) arranged on the clamping head (402), a movable head (404) movably arranged on the clamping head (402), and a spring (405) sleeved on the clamping head (402); the spring (405) is located between the stopper sleeve (403) and the movable head (404) to provide elastic force for the movable head (404); the first connecting hole (401) is opened on the clamping head (402) One end of the clamping head (402) is provided with a plurality of waist-shaped holes (406), and each waist-shaped hole (406) has an opening (407) on one side, and the clamping head (402) is provided with a corresponding locking hole (408) at the position of the opening (407), and the movable head (404) is provided with a plurality of locking rods (409), and the locking rods (409) correspond to the locking holes (408) one by one, and the locking rods (409) can be inserted into the locking holes (408); A fixing rod (501) is arranged inside the acetabular rasp (5), and the fixing rod (501) can enter the waist-shaped hole (406) from the opening (407).

3. The quick-change hip replacement surgery tool according to claim 1, characterized in that: The number of the waist-shaped holes (406) is four, and the number of the locking holes (408) and the locking rods (409) are also four, respectively, and are evenly arranged along the circumferential direction; the fixing rod (501) is cross-shaped, and each end of the fixing rod (501) enters through the opening (407) of each waist-shaped hole (406) and rotates to reach the inside of the waist-shaped hole (406).

4. The quick-change hip replacement surgical tool according to claim 1, characterized in that: The number of the bent transmission rods (303) is an odd number, and the pivot (301) is parallel to the connecting transmission rod (302).

5. The quick-change hip replacement surgery tool according to claim 4, characterized in that: The number of the bent transmission rods (303) is three.

6. The quick-change hip replacement surgical tool according to claim 5, characterized in that: The pivot (301) is rotatably arranged in the hollow structure of the grip (101) via a bearing, and the connecting transmission rod (302) is rotatably arranged inside the end of the extension part (2) via a bearing.

7. The quick-change hip replacement surgical tool according to claim 6, characterized in that: A bearing is provided between at least the middle bent transmission rod (303) of the three bent transmission rods (303) and the extension portion (2).

8. The quick-change hip replacement surgical tool according to claim 1, characterized in that: The connection structure of the connecting head (305) is an external thread, and the connection structures of the first connecting hole (401) and the second connecting hole (601) are internal threads.

9. The quick-change hip replacement surgical tool according to claim 1, characterized in that: The handheld portion (1) further comprises an operating rod (102), wherein the operating rod (102) is hinged on the gripping handle (101) and is used for braking the pivot (301).

10. The quick-change hip replacement surgical tool according to any one of claims 1 to 9, characterized in that: The universal joint (304) is connected to the pivot (301), the connecting transmission rod (302) or the bent transmission rod (303) respectively through two half pins (307); one end of the half pin (307) is interference fit with the pivot (301), the connecting transmission rod (302) or the bent transmission rod (303), and the other end is clearance fit with the universal joint (304).

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