Anti-rotation instrument for long bone fracture reduction nail

Abstract

The utility model discloses an anti-rotation instrument for a long bone fracture reduction nail, the reduction nail comprises an insertion part and an operation holding part, the anti-rotation instrument comprises an anti-rotation structure, the anti-rotation structure is arranged between the insertion part and the operation holding part, and the anti-rotation structure comprises at least one plate-shaped structure extending outwards from the central axis of the reduction nail; nail inserting holes are formed in the plate-shaped structure; the anti-rotation nail is inserted into the broken bone after passing through the nail inserting hole; and the insertion parts of the anti-rotation nail and the reduction nail are inserted into the broken bone to realize rotation prevention. The anti-rotation nail and the reduction nail are combined and arranged on the same instrument structure through the anti-rotation structure, rotation loosening during reduction operation on the broken bone is prevented through cooperation of at least two structures inserted into the broken bone, and the reduction effect is effectively guaranteed. A patient reference frame can be further arranged on the anti-rotation structure, so that resetting operation and the navigation tracking process are synchronized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical devices, especially relates to the technical field of medical devices, concretely is a kind of anti-rotation device for long bone fracture reduction nail. BACKGROUND

[0002] At present, many operations are completed by using navigation system to ensure the accuracy of operation process, and the fracture operation of long bone such as femur and humerus, because the entering direction and entering angle of each instrument are extremely dependent on the experience of doctors, the operation is difficult, and the deviation of reduction can lead to poor recovery of patients.

[0003] In the prior art, the patient reference frame fixed to the patient plays a role of assisting to complete the tracking of the operation position of the patient by being recognized by the navigation system and being displayed in the imaging system, and when long bone is fractured, two corresponding patient reference frames are needed to ensure the tracking accuracy, and if the above method is still used, the patient reference frame will occupy space and affect the related operation of the operator for reduction.

[0004] How to find an effective way to save space to complete the reduction operation is the key to solve the above problems, and the utility model provides an anti-rotation device for long bone fracture reduction nail around the above problems. UTILITY MODEL CONTENT

[0005] At present, in clinic, the patient with long bone fracture is usually reduced by the operator holding the limb of the patient with his hand, but in long bone fracture operation navigation system, the hand directly operates to occupy large space, which can easily touch the patient reference frame and affect the tracking accuracy, and if a long reduction nail is used for reduction, the reduction nail can be loose due to the multiple directions of reduction operation, so an instrument for avoiding rotation of the reduction nail is needed.

[0006] An anti-rotation device for long bone fracture reduction nail, the reduction nail includes an insertion part and an operation holding part, the anti-rotation device includes

[0007] Anti-rotation structure is arranged between the insertion part and the operation holding part, and the anti-rotation structure includes at least one plate-shaped structure extending outward from the central axis of the reduction nail, and the plate-shaped structure is provided with a nail insertion hole;

[0008] Anti-rotation nail is inserted into the fractured bone through the nail insertion hole;

[0009] The anti-rotation nail and the insertion part of the reduction nail are inserted into the fractured bone to prevent rotation.

[0010] The anti-rotation structure is used to combine the anti-rotation nail and the reset nail on the same instrument structure, and the cooperation of the at least two structures inserted into the broken bone can prevent the rotation and loosening during the reset operation, thereby effectively ensuring the reset effect.

[0011] Further, the plate-shaped structure is provided with a plurality of nail insertion holes, and the plurality of nail insertion holes are arranged in a single row or in multiple rows and multiple columns on the plate-shaped structure. The single row arrangement can effectively avoid interference with other structures. The multiple rows and multiple columns arrangement can select an appropriate position as needed.

[0012] Further, the single plate-shaped structure is a fan-shaped structure with a fan-shaped cross section, and a plurality of nail insertion holes are arranged along the edge circumference of the edge region of the fan-shaped structure. This arrangement can increase the coverage of the nail insertion holes and ensure that a hole can face the bone surface, facilitating the insertion of the anti-rotation nail. Arranging the nail insertion holes on the edge of the fan-shaped structure can increase the coverage of the nail insertion holes and increase the number of nail insertion holes.

[0013] Further, the anti-rotation nail is provided with a depth-limiting cap to prevent the anti-rotation nail from extending into the bone cavity and affecting the placement of the intramedullary nail.

[0014] Further, after the anti-rotation nail is inserted through the nail insertion hole, the tip of the anti-rotation nail is flush with the tip of the insertion part. Because the insertion part is placed first, the flush arrangement can effectively prevent the anti-rotation nail from being inserted deeper than the insertion part. When setting, only the safety of the insertion part needs to be ensured to reduce the difficulty of setting the anti-rotation nail.

[0015] Further, the plate-shaped structure includes 1-2 pairs of symmetrically arranged fan-shaped structures, and preferably 1 pair of fan-shaped structures.

[0016] Further, the angle of the fan-shaped structure is 40-50 degrees. This arrangement can avoid the shielding of the plate-shaped structure to the lower area and ensure a space for observation.

[0017] Further, in order to realize the combination of surgical navigation and reset operation, a reference frame setting structure is extended from the edge of the anti-rotation structure to set the patient reference frame.

[0018] Further, the reference frame setting structure includes a reference frame setting plate extended from the edge of the anti-rotation structure; the reference frame setting plate can be arranged in a straight line or a right angle; a reference frame setting rod is arranged on the reference frame setting plate; and a patient reference frame is arranged on the reference frame setting rod.

[0019] Further, a reference frame setting structure is arranged on the anti-rotation structure, or two symmetrical reference frame setting structures are arranged, which can be quickly selected according to the needs of the surgical scene, and the combination of the patient reference frame and the operating instrument and the reset maintaining structure is realized without arranging the patient reference frame on the fan-shaped structure.

[0020] Further, the operation holding part comprises a center rod which is integrally connected with the insertion part, and the anti-rotation structure comprises a non-circular sleeve hole which is arranged outside the center rod and has a shape consistent with the cross-sectional area of the center rod.

[0021] Further, the sleeve hole is a square hole with rounded edges.

[0022] Further, the operation holding structure further comprises an operation handle arranged outside the center rod, and an arc-shaped protrusion for limiting is arranged beside the sleeve hole, and an arc-shaped notch for limiting is arranged on the operation handle. The secondary limiting purpose is achieved by the combination of the two, and the shaking of the operation handle during operation is avoided.

[0023] Technical effects

[0024] 1) The combination of the anti-rotation structure and the insertion part of the reset nail can effectively ensure the stability of the reset nail during the reset process, avoid the instability of the instrument caused by shaking, and also avoid the inaccuracy of the tracking position of the tracking patient reference frame when the patient reference frame is arranged on the reset nail.

[0025] 2) By arranging the plate-shaped structure as an arc-shaped structure and arranging a plurality of insertion nail holes in the edge circumferential array, the difficulty of arranging the insertion nail can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic view of the anti-rotation structure with a symmetrically arranged plate-shaped structure of the utility model;

[0027] Figure 2 It is a schematic view of the anti-rotation structure with a reference frame setting plate and a reference frame setting rod of the utility model;

[0028] Figure 3 It is a schematic view of the anti-rotation nail structure of the utility model;

[0029] Figure 4 It is a schematic view of the reset nail structure of the utility model;

[0030] Figure 5 It is a schematic view of the reset nail side view structure of the effective depth limiting platform of the utility model;

[0031] Figure 6 It is a schematic view of the threaded sharp segment structure with a depth limiting plane of the utility model;

[0032] Figure 7 It is the partial enlarged structural schematic view of the arc-shaped protrusion and the arc-shaped recess cooperation part of the utility model;

[0033] Figure 8 It is the combination structure schematic view of the lock cap and the lock thread rod of the utility model;

[0034] Figure 9 It is the combination structure schematic view of the anti-rotation instrument and the reset nail of the utility model for setting the patient reference frame to the anti-rotation structure part;

[0035] Figure 10 It is the combination structure schematic view of the anti-rotation instrument and the reset nail of the utility model for setting the patient reference frame to the operation handle part;

[0036] Main figure mark explanation

[0037] 11, insertion part; 111, thread tip section; 112, insertion rod section; 113, depth limiting plane; 121, center rod; 122, operation handle; 123, limiting structure; 1231, limiting plane; 21, lock thread rod; 22, lock cap; 23, lock thread hole; 3, patient reference frame; 4, anti-rotation structure; 41, anti-rotation nail; 411, depth limiting cap; 42, plate-shaped structure; 421, nail insertion hole; 51, arc-shaped protrusion; 52, arc-shaped recess; 61, reference frame setting plate; 62, reference frame setting rod. Specific implementation

[0038] Reference Figures 1-6 ; an anti-rotation instrument for a long bone fracture reset nail, the reset nail comprising an insertion part 11 and an operation holding part, the anti-rotation instrument comprising an anti-rotation structure 4 arranged between the insertion part 11 and the operation holding part, the anti-rotation structure 4 comprising at least one plate-shaped structure 42 extending outward from the center axis of the reset nail, the plate-shaped structure 42 being provided with a nail insertion hole 421; and an anti-rotation nail 41 inserted into the broken bone through the nail insertion hole 421; the anti-rotation nail 41 and the insertion part of the reset nail are both inserted into the broken bone, for realizing anti-rotation.

[0039] The anti-rotation nail 41 and the reset nail are combined and arranged on the same instrument structure through the anti-rotation structure 4, and the rotation loosening during the reset operation on the broken bone is prevented through the cooperation of the at least two insertion broken bone structures, so that the reset effect is effectively ensured.

[0040] More preferably, the plate-shaped structure 42 is provided with a plurality of insertion holes 421, which are arranged in a single row or a plurality of rows and columns on the plate-shaped structure 42. The single-row arrangement is arranged at the edge of the plate-shaped structure 42, which can effectively avoid interference with other structures. The plurality of rows and columns can be arranged at appropriate positions as needed.

[0041] More preferably, the plate-shaped structure 42 is provided with a plurality of insertion holes 421, which are arranged in a single row or a plurality of rows and columns on the plate-shaped structure 42. The single-row arrangement is arranged at the edge of the plate-shaped structure 42, which can effectively avoid interference with other structures. The plurality of rows and columns can be arranged at appropriate positions as needed. Figure 1 More preferably, the plate-shaped structure 42 is provided with a plurality of insertion holes 421, which are arranged in a single row or a plurality of rows and columns on the plate-shaped structure 42. The single-row arrangement is arranged at the edge of the plate-shaped structure 42, which can effectively avoid interference with other structures. The plurality of rows and columns can be arranged at appropriate positions as needed.

[0042] More preferably, the plate-shaped structure 42 is provided with a plurality of insertion holes 421, which are arranged in a single row or a plurality of rows and columns on the plate-shaped structure 42. The single-row arrangement is arranged at the edge of the plate-shaped structure 42, which can effectively avoid interference with other structures. The plurality of rows and columns can be arranged at appropriate positions as needed.

[0043] More preferably, the plate-shaped structure 42 is provided with a plurality of insertion holes 421, which are arranged in a single row or a plurality of rows and columns on the plate-shaped structure 42. The single-row arrangement is arranged at the edge of the plate-shaped structure 42, which can effectively avoid interference with other structures. The plurality of rows and columns can be arranged at appropriate positions as needed. Figure 9 More preferably, the plate-shaped structure 42 is provided with a plurality of insertion holes 421, which are arranged in a single row or a plurality of rows and columns on the plate-shaped structure 42. The single-row arrangement is arranged at the edge of the plate-shaped structure 42, which can effectively avoid interference with other structures. The plurality of rows and columns can be arranged at appropriate positions as needed.

[0044] More preferably, the plate-shaped structure 42 includes 1-2 pairs of symmetrically arranged fan-shaped structures, and one pair of fan-shaped structures is preferably arranged.

[0045] More preferably, the angle of the fan-shaped structure is 40-50 degrees. This arrangement can avoid the shielding of the plate-shaped structure 42 to the lower area and ensure that there is space for observation.

[0046] More preferably, in order to realize the combination of surgical navigation and reduction operation, a reference frame setting structure is extended from the edge of the anti-rotation structure 4 to set the patient reference frame 3.

[0047] More preferably, the plate-shaped structure 42 is provided with a plurality of insertion holes 421, which are arranged in a single row or a plurality of rows and columns on the plate-shaped structure 42. The single-row arrangement is arranged at the edge of the plate-shaped structure 42, which can effectively avoid interference with other structures. The plurality of rows and columns can be arranged at appropriate positions as needed. Figure 2 More preferably, the plate-shaped structure 42 is provided with a plurality of insertion holes 421, which are arranged in a single row or a plurality of rows and columns on the plate-shaped structure 42. The single-row arrangement is arranged at the edge of the plate-shaped structure 42, which can effectively avoid interference with other structures. The plurality of rows and columns can be arranged at appropriate positions as needed.

[0048] More preferably, the anti-rotation structure 4 is provided with a reference frame setting structure or two symmetrical reference frame setting structures, which can be quickly selected according to the needs of the surgical scene, and the patient reference frame 3 is combined with the operating instrument and the reset maintenance structure without being set to the fan-shaped structure. The patient reference frame 3 is provided with at least three NDI balls that are not on the same straight line; and the patient reference frame 3 is set as a reference frame with adjustable angles, which can be adjusted according to the needs of the surgery to face the shooting structure of the navigation system.

[0049] More preferably, the operating holding part includes a center rod 121 integrally connected with the insertion part 11, and the anti-rotation structure 4 includes a non-circular sleeve hole with a shape consistent with the cross-sectional area of the center rod 121, which is sleeved outside the center rod 121.

[0050] More preferably, the sleeve hole is a square hole with rounded edges.

[0051] More preferably, the reference Figure 7 With Figure 10 ; The operating holding structure further includes an operating handle 122 provided outside the center rod 121, and an arc-shaped protrusion for limiting is provided beside the sleeve hole, and an arc-shaped notch 52 for limiting is provided on the operating handle 122. The combination of the two solves the purpose of secondary limiting and avoids the shaking of the operating handle 122 during operation.

[0052] The center rod 121 is integrally connected with the insertion part, and a non-circular hole is provided on the operating handle 122, the center rod 121 is provided as a non-circular rod, the non-circular hole and the non-circular rod are matched, and the combination will not rotate. The preferred non-circular shape is a quadrilateral, further a square, and each corner of the square is rounded.

[0053] More preferably, the first end of the center rod 121 is away from the insertion part 11, and the second end of the center rod 121 is close to the insertion part 11; the first end of the center rod 121 is provided with a locking cap, the front end of the rotating cap is provided with a locking rod, and the center rod 121 is provided with a locking hole.

[0054] More preferably, the reference Figure 9 With Figure 10; A limiting structure 123 is arranged between the center rod 121 and the insertion part, the limiting ring is extended outward from the center rod 121 or the insertion part, the limiting structure 123 includes a limiting plane 1231, the anti-rotation structure 4 is limited on the limiting plane 1231, and the operating handle 122 is arranged above the anti-rotation structure 4. Through the arrangement, the anti-rotation structure 4 can be effectively fixed to the accurate position.

[0055] Reference Figure 5 With Figure 8 Further, a locking structure is arranged to lock the operating handle 122 on the center rod 121, and the specific structure is that the locking structure includes a locking threaded rod 21 and a locking cap 22, the center rod 121 is provided with a locking threaded hole 23 corresponding to the locking rod, the locking threaded rod 21 is combined with the locking threaded hole 23, and the operating handle 122 is locked on the center rod 121 by rotating the locking cap 22.

[0056] More preferably, in order to meet the length of the hand holding, the length of the center rod 121 is 10-15 cm, and the distance can meet the convenient hand holding operation. In order to avoid the interference of the operator to the operating part during the operation, the insertion part is arranged to introduce the operating holding part to the area away from the skin; the length of the insertion part is arranged to be 10-15 cm, and the length can guarantee the need of insertion through the body surface. In addition, the insertion part can be away from the skin by a certain distance, so that the insertion of the anti-rotation nail 41 is convenient.

[0057] More preferably, in order to meet the length of the hand holding, the length of the center rod 121 is 10-15 cm, and the distance can meet the convenient hand holding operation. In order to avoid the interference of the operator to the operating part during the operation, the insertion part is arranged to introduce the operating holding part to the area away from the skin; the length of the insertion part is arranged to be 10-15 cm, and the length can guarantee the need of insertion through the body surface. In addition, the insertion part can be away from the skin by a certain distance, so that the insertion of the anti-rotation nail 41 is convenient. Figure 6 ; The insertion part 11 includes a threaded tip part and an insertion rod part; the threaded tip is provided with a self-tapping groove, and through the arrangement, the insertion of the threaded tip part of the insertion part 11 is facilitated. Further, the first end of the threaded tip part is a pointed end, and the opposite end is a second end, and the second end of the threaded tip part is provided with a depth limiting structure; the depth limiting structure includes a depth limiting plane 113 with a diameter larger than the maximum diameter of the threaded tip part, or the depth limiting plane 113 is formed by the insertion rod part with a larger diameter than the threaded tip part; because the size difference between the insertion rod part and the threaded tip part forms a depth limiting plane 113, through the arrangement of the depth limiting plane 113, only the threaded tip part of the insertion rod can enter the bone, and the rear insertion rod part cannot enter, so that the threaded tip part is effectively prevented from extending too much into the bone cavity to affect the placement of the intramedullary nail.

[0058] More specifically, the length of the threaded tip part is 0.8-1.2 cm, and the length arrangement can meet the need of avoiding entering the bone cavity and can guarantee sufficient depth, so as to provide effective anchoring force for the long bone fracture reduction of the operating part connected with the insertion part 11.

[0059] One embodiment is that Figure 10In addition to setting the patient reference frame 3 to the anti-rotation structure 4, the anti-rotation structure 4 can only play an anti-rotation function, and the patient reference frame 3 is set on the operating handle 122.

[0060] The technical solutions in the embodiments of the present application are clearly and completely described above through specific specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific embodiments. In the case of no conflict, the above embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

Claims

1. An anti-rotation device for a long bone fracture reduction nail, the reduction nail comprising an insertion portion and an operating grip portion, characterized in that: Anti-rotation devices include An anti-rotation structure is provided between the insertion portion and the operating grip portion, and the anti-rotation structure includes at least one plate-shaped structure extending outward from the central axis of the reset pin, and a pin insertion hole is provided on the plate-shaped structure; The anti-rotation nail is inserted into the broken bone through the nail hole; The anti-rotation nail and the insertion portion of the reduction nail are inserted into the broken bone at the same time to realize the rotation of the reduction nail.

2. The anti-rotation device according to claim 1, characterized in that: A plurality of nail insertion holes are arranged on the plate-shaped structure. The nail insertion holes are arranged in a plurality of ways, and the plurality of nail insertion holes are arranged in a single row edge manner or in a multi-row and multi-column arrangement manner on the plate-shaped structure.

3. The anti-rotation device according to claim 2, characterized in that: The single plate-shaped structure is a fan-shaped structure with a fan-shaped cross section, and a plurality of nail insertion holes are arranged in an array along the edge circumference of the fan-shaped structure.

4. The anti-rotation device according to claim 3, characterized in that: A depth limiting cap is provided on the anti-rotation nail.

5. The anti-rotation device according to claim 3, characterized in that: After the anti-rotation nail is inserted through the nail insertion hole, the position of the tip of the anti-rotation nail is flush with the tip of the insertion part.

6. The anti-rotation device according to claim 3, characterized in that: The plate-shaped structure includes 1-2 pairs of symmetrically arranged fan-shaped structures, and the angle range of the fan-shaped structures is 40-50 degrees.

7. The anti-rotation device according to claim 1, characterized in that: A reference frame setting structure extends from the edge of the anti-rotation structure and is used to set a patient reference frame.

8. The anti-rotation device according to claim 1, characterized in that: The reference frame setting structure includes a reference frame setting plate extending from the edge of the anti-rotation structure; the reference frame setting plate is set as a straight plate or a right-angle plate; a reference frame setting rod is set on the reference frame setting plate; and a patient reference frame is set on the reference frame setting rod.

9. The anti-rotation device according to any one of claims 1 to 8, characterized in that: The operating grip portion includes a central rod integrally connected to the insertion portion, and the anti-rotation structure includes a non-circular sleeve hole, the shape of the sleeve hole is consistent with the cross-sectional area of ​​the central rod, and the sleeve hole is sleeved on the outside of the central rod.

10. The anti-rotation device according to claim 9, characterized in that: The operating grip structure also includes an operating handle arranged on the outside of the central rod, a limiting arc protrusion is arranged next to the sleeve hole, and a limiting arc recess is arranged on the corresponding operating handle.

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