Internal fixation screw guider for femoral neck fracture

Abstract

The utility model discloses a femoral neck fracture internal fixation screw guider which comprises a main guide rod, and an upper branch guide rod and a lower branch guide rod are arranged on the main guide rod in a sliding mode. The upper branch guide rod is provided with two upper connecting pieces, each upper connecting piece is rotationally provided with an upper guide pipe, and the rotating axis direction of the upper guide pipes is perpendicular to the axis of the upper branch guide rod. A lower connecting piece is arranged on the lower branch guide rod, a lower guide pipe is rotationally arranged on the lower connecting piece, and the rotating axis of the lower guide pipe is perpendicular to the axis of the lower branch guide rod. The upper branch guide rod and the lower branch guide rod which can slide are arranged on the main guide rod, and the upper connecting piece and the lower connecting piece which can slide are respectively arranged on the upper branch guide rod and the lower branch guide rod, so that the upper guide pipe and the lower guide pipe can be horizontally and vertically adjusted to be accurately aligned with an operation mark; and the upper guide pipe and the lower guide pipe can independently rotate to adjust the guide angle, so that accurate guidance is provided for locking of the bone screw.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a femoral neck fracture internal fixation screw guide. Background Art

[0002] Femoral neck fracture is one of the common fractures in the elderly population. When fixing a femoral neck fracture, three screws are usually required to be locked obliquely upward along the outer plane of the femoral neck to form a triangular fixation. Therefore, at least two screws are required to be locked in different planes, that is, to form a double-plane screw fixation.

[0003] Bone screws for femoral neck fracture fixation usually require a guide for guidance and locking, and the commonly used screw guides are usually independent guides, that is, they only have one guide structure, and the locking position and locking angle of each screw need to be manually adjusted. However, during the use of this independent guide, the locking position and locking angle of each screw need to be manually adjusted in advance, that is, each time a mark position is changed, the guide needs to be moved to the corresponding mark, and the guide angle is manually adjusted according to experience or multiple radiographic images, and this angle is manually maintained to guide the screw to be locked. It is easy to be affected by external interference and cause position deviation or angle deviation, which results in the inability of the locking screw to accurately lock into the corresponding position of the broken bone, affecting the fixation effect.

[0004] Therefore, the existing method of manually adjusting and maintaining the screw locking position and angle using an independent guide may cause the screw locking position or locking angle to shift due to difficulty in accurately grasping the screw locking position and angle, thereby affecting the fixing effect. Utility Model Content

[0005] The utility model aims to provide a screw guide for internal fixation of femoral neck fracture, so as to solve the technical problem in the prior art that it is difficult to accurately grasp the locking position and angle of the screw, which may cause the screw locking position deviation or locking angle deviation.

[0006] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0007] A femoral neck fracture internal fixation screw guide, comprising:

[0008] A main guide rod, on which an upper sub-guide rod and a lower sub-guide rod are slidably arranged respectively;

[0009] The upper branch guide rod is provided with two upper connecting pieces capable of sliding along its axial direction, each of the upper connecting pieces is rotatably provided with an upper guide tube, and the rotation axis of the upper guide tube is perpendicular to the axis of the upper branch guide rod;

[0010] The lower guide rod is provided with a lower connecting piece which can slide along its axial direction, and the lower connecting piece is rotatably provided with a lower guide tube, and the rotation axis of the lower guide tube is perpendicular to the axis of the lower guide rod;

[0011] Wherein, the upper guide tube and the lower guide tube face opposite directions, and the upper connecting piece can rotate on the upper branch guide rod, and the lower connecting piece can rotate on the lower branch guide rod;

[0012] The upper sub-guide rod and the lower sub-guide rod slide on the main guide rod, and can adjust the horizontal positions of the upper guide tube and the lower guide tube respectively;

[0013] The upper connecting piece can slide independently on the upper branch guide rod and adjust the position of the upper guide tube, and the lower connecting piece can slide independently on the lower branch guide rod and adjust the vertical position of the lower guide tube;

[0014] Furthermore, the upper connecting piece can independently rotate on the upper branch guide rod and adjust the guiding angle of the upper guide tube, while the lower connecting piece can independently rotate on the lower branch guide rod and adjust the guiding angle of the lower guide tube.

[0015] As a preferred solution of the utility model, two main sliding sleeves are slidably arranged on the main guide rod, and the upper sub-guide rod and the lower sub-guide rod are respectively vertically fixed on the outer walls of the two main sliding sleeves;

[0016] Wherein, the two main sliding sleeves are both capable of rotating around the axis of the main guide rod.

[0017] As a preferred solution of the utility model, the upper connecting member includes an upper sliding sleeve that can slide and rotate on the upper branch guide rod, an upper guide sleeve is fixed on the outer wall of the upper sliding sleeve, and the upper guide tube is rotatably installed in the upper guide sleeve;

[0018] Wherein, the axis of the upper guide sleeve is skewed and perpendicular to the axis of the upper sliding sleeve.

[0019] As a preferred solution of the utility model, the lower connecting member includes a lower sliding sleeve that can slide and rotate on the lower branch guide rod, a lower guide sleeve is fixed on the outer wall of the lower sliding sleeve, and the lower guide tube is rotatably installed in the lower guide sleeve;

[0020] Wherein, the axis of the lower guide sleeve is skewed and perpendicular to the axis of the lower sliding sleeve.

[0021] As a preferred solution of the utility model, an upper extension rod is provided on the upper guide tube, and the upper extension rod is slidably and rotatably arranged in the upper guide sleeve;

[0022] A lower extension rod is arranged on the lower guide tube, and the lower extension rod is slidably and rotatably arranged in the lower guide sleeve.

[0023] As a preferred solution of the utility model, a fixing piece is provided on the main rod, and the fixing piece is located in the middle or end of the main rod.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The utility model provides a slidable upper sub-guide rod and a lower sub-guide rod on the main guide rod, and respectively provides a slidable upper connecting piece and a lower connecting piece on the upper sub-guide rod and the lower sub-guide rod, so that the upper guide tube and the lower guide tube can be adjusted horizontally and vertically to be accurately aligned with the surgical mark, and the upper guide tube and the lower guide tube can be independently rotated to adjust the guide angle, so as to provide accurate guidance for locking the bone screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0027] Figure 1 A structural schematic diagram of a screw guide for internal fixation of femoral neck fracture is provided for an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of the structure of the upper guide rod portion of the internal fixation screw guide for femoral neck fracture is provided for the embodiment of the utility model;

[0029] Figure 3 The utility model provides a schematic structural diagram of the lower guide rod portion of the femoral neck fracture internal fixation screw guide.

[0030] The numbers in the figure represent the following:

[0031] 1-main rod; 2-upper branch guide rod; 3-lower branch guide rod; 4-upper connecting piece; 5-upper guide tube; 6-lower connecting piece; 7-lower guide tube;

[0032] 11-main sliding sleeve; 12-fixing piece; 41-upper sliding sleeve; 42-upper guide sleeve; 51-upper extension rod; 61-lower sliding sleeve; 62-lower guide sleeve; 71-lower extension rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] like Figure 1 As shown, the utility model provides a femoral neck fracture internal fixation screw guide, comprising:

[0035] A main guide rod 1, on which an upper sub-guide rod 2 and a lower sub-guide rod 3 are slidably arranged;

[0036] The upper guide rod 2 is provided with two upper connecting pieces 4 which can slide along its axial direction, and each upper connecting piece 4 is rotatably provided with an upper guide tube 5, and the rotation axis of the upper guide tube 5 is perpendicular to the axis of the upper guide rod 2;

[0037] The lower guide rod 3 is provided with a lower connecting piece 6 which can slide along its axial direction, and the lower connecting piece 6 is rotatably provided with a lower guide tube 7, and the rotation axis of the lower guide tube 7 is perpendicular to the axis of the lower guide rod 3;

[0038] The upper guide tube 5 and the lower guide tube 7 face in opposite directions, and the upper connecting member 4 can rotate on the upper branch guide rod 2, and the lower connecting member 6 can rotate on the lower branch guide rod 3;

[0039] The upper sub-guide rod 2 and the lower sub-guide rod 3 slide on the main guide rod 1, and can adjust the horizontal positions of the upper guide tube 5 and the lower guide tube 7 respectively;

[0040] The upper connecting member 4 can slide independently on the upper branch guide rod 2 and adjust the position of the upper guide tube 5, and the lower connecting member 6 can slide independently on the lower branch guide rod 3 and adjust the vertical position of the lower guide tube 7;

[0041] The upper connecting member 4 can independently rotate on the upper branch guide rod 2 and adjust the guide angle of the upper guide tube 5 , while the lower connecting member 6 can independently rotate on the lower branch guide rod 3 and adjust the guide angle of the lower guide tube 7 .

[0042] The guide of this embodiment mainly utilizes the upper sub-guide rod 2 and the lower sub-guide rod 3 that can slide on the main rod 1 to respectively adjust the horizontal positions of the upper guide tube 5 and the lower guide tube 7, while the upper connecting member 4 that slides on the upper sub-guide rod 2 and the lower connecting member 6 that slides on the lower sub-guide rod 3 respectively adjust the vertical positions of the upper guide tube 5 and the lower guide tube 7 to achieve precise positioning of the upper guide tube 5 and the lower guide tube 7, and after locking, the guiding angles of the upper guide tube 5 and the lower guide tube 7 can be adjusted by rotating the upper guide tube 5 and the lower guide tube 7, thereby providing precise guidance for locking the bone screws.

[0043] Among them, the movement and locking of the upper sub-guide rod 2, the lower sub-guide rod 3, the upper connecting piece 4, the lower connecting piece 6, the upper guide tube 5 and the lower guide tube 7 are all controlled by the locking screws, and the locking and unlocking of the locking screws are conventional technical means and will not be repeated.

[0044] Compared with the existing independent guides, the guide of this embodiment can adjust the horizontal positions of the upper guide tube 5 and the lower guide tube 7 by adjusting the horizontal positions of the upper sub-guide rod 2 and the lower sub-guide rod 3 on the main rod 1 according to the surgical marks, and adjust the vertical positions of the upper guide tube 5 and the lower guide tube 7 by adjusting the position of the upper connecting piece 4 on the upper sub-guide rod 2 and the position of the lower connecting piece 6 on the lower sub-guide rod 3, so that the upper guide tube 5 and the lower guide tube 7 are aligned with their surgical markings.

[0045] And by rotating the upper guide tube 5 and the lower guide tube 7, the guiding angles of the upper guide tube 5 and the lower guide tube 7 are adjusted to be the same as the bone screw locking angle in the surgical plan, so that the bone screw can be accurately introduced into the broken bone. And because the upper guide tube 5 and the lower guide tube 7 are both locked during guiding, in the process of replacing the locked bone screw, the situation that the misalignment or guide angle deviation that affects the accurate locking of the bone screw is avoided.

[0046] The upper sub-guide rod 2 and the lower sub-guide rod 3 can slide freely on the main guide rod 1, as follows:

[0047] like Figure 1 As shown, two main sliding sleeves 11 are slidably arranged on the main guide rod 1, and the upper sub-guide rod 2 and the lower sub-guide rod 3 are vertically fixed on the outer walls of the two main sliding sleeves 11 respectively;

[0048] The two main sliding sleeves 11 can both rotate around the axis of the main guide rod 1 .

[0049] The upper branch guide rod 2 and the lower branch guide rod 3 are both installed on the main guide rod 1 through the main sliding sleeve 11. The main sliding sleeve 11 is provided with a locking screw. When the upper branch guide rod 2 and the lower branch guide rod 3 need to be moved, the locking screw is loosened; or when the upper branch guide rod 2 and the lower branch guide rod 3 need to be fixed, the locking screw is tightened.

[0050] The main sliding sleeve 11 can rotate, which can make the upper sub-guide rod 2 and the lower sub-guide rod 3 rotate around the main guide rod 1, so that the upper sub-guide rod 2 and the lower sub-guide rod 3 can be located on the same side or form an angle, increasing the adjustable guiding range of the upper guide tube 5 and the lower guide tube 7.

[0051] The upper guide tube 5 can adjust its vertical position through the upper connection piece 4, and the upper guide tube 5 can rotate on the upper connection piece 4 to adjust the guide angle. The structure is as follows:

[0052] like Figure 1 and Figure 2 As shown, the upper connecting member 4 includes an upper sliding sleeve 41 that can slide and rotate on the upper branch guide rod 2, an upper guide sleeve 42 is fixed on the outer wall of the upper sliding sleeve 41, and the upper guide tube 5 is rotatably installed in the upper guide sleeve 42;

[0053] The axis of the upper guide sleeve 42 is skewed and perpendicular to the axis of the upper sliding sleeve 41 .

[0054] The upper sliding sleeve 41 can slide on the upper branch guide rod 2 and be fixed by a locking screw provided thereon, while the upper guide tube 5 can rotate in the upper guide sleeve 42 and be fixed by a locking screw provided thereon.

[0055] The upper guide sleeve 42 and the upper sliding sleeve 41 are arranged in eccentric perpendicular positions, which can effectively reduce the distance between the upper guide tube 5 and the upper branch guide rod 2, thereby further reducing the minimum horizontal adjustable distance between the upper guide tube 5 and the lower guide tube 7.

[0056] The lower guide tube 7 can adjust its vertical position through the lower connection member 6, and the lower guide tube 7 can be rotated on the lower connection member 6 to adjust the guide angle. The structure is as follows:

[0057] like Figure 1 and Figure 3 As shown, the lower connecting member 6 includes a lower sliding sleeve 61 that can slide and rotate on the lower sub-guide rod 3, a lower guide sleeve 62 is fixed on the outer wall of the lower sliding sleeve 61, and the lower guide tube 7 is rotatably installed in the lower guide sleeve 62;

[0058] The axis of the lower guide sleeve 62 is skewed and perpendicular to the axis of the lower sliding sleeve 61 .

[0059] The lower sliding sleeve 61 can slide on the lower branch guide rod 3 and be fixed by a locking screw provided thereon, while the lower guide tube 7 can rotate in the lower guide sleeve 62 and be fixed by a locking screw provided thereon.

[0060] The lower guide sleeve 62 and the lower sliding sleeve 61 are arranged in eccentric perpendicular positions, which can effectively reduce the distance between the lower guide tube 7 and the lower branch guide rod 3, thereby further reducing the minimum horizontal adjustable distance between the upper guide tube 5 and the lower guide tube 7.

[0061] When the minimum horizontally adjustable distance between the upper guide tube 5 and the lower guide tube 7 is reduced, the maximum horizontally adjustable distance will also be reduced synchronously, resulting in the difference between the maximum and minimum horizontally adjustable distances remaining unchanged.

[0062] Therefore, in order to further expand the range of the horizontally adjustable distance, the following preferred embodiments are provided.

[0063] like Figure 2 and Figure 3 As shown, an upper extension rod 51 is provided on the upper guide tube 5, and the upper extension rod 51 is slidably and rotatably arranged in the upper guide sleeve 42;

[0064] A lower extension rod 71 is provided on the lower guide tube 7 , and the lower extension rod 71 is slidably and rotatably disposed in the lower guide sleeve 62 .

[0065] An upper extension rod 51 and a lower extension rod 71 are respectively provided on the upper guide tube 5 and the lower guide tube 7. Then, during the adjustment process, after the upper guide tube 5 and the lower guide tube 7 are respectively moved to the two ends of the main rod 1, the upper extension rod 51 and the lower extension rod 71 can be continued to be moved, so that the horizontal distance between the upper guide tube 5 and the lower guide tube 7 can be further increased, so as to achieve the effect of expanding the horizontal adjustable distance range of the upper guide tube 5 and the lower guide tube 7.

[0066] Of course, an assembled structure can be adopted between the upper guide tube 5 and the lower guide tube 7 and the upper extension rod 51 and the lower extension rod 71, that is, the upper guide tube 5 and the lower guide tube 7 can be independently installed in the upper conduction 42 and the lower guide sleeve 62 respectively, and can also be installed in the upper conduction 42 and the lower guide sleeve 62 respectively through the upper extension rod 51 and the lower extension rod 71.

[0067] For ease of guidance, Figure 1 As shown, a fixing member 12 is provided on the main rod 1 , and the fixing member 12 is located in the middle or end of the main rod 1 .

[0068] The fixing member 12 can be mounted on a handle for hand-held fixing, or can be connected and fixed to a fixing frame used in surgery, so as to ensure the stability of the guide.

[0069] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A screw guide for internal fixation of femoral neck fracture, characterized in that: include: A main guide rod (1), on which an upper sub-guide rod (2) and a lower sub-guide rod (3) are slidably arranged respectively; The upper branch guide rod (2) is provided with two upper connecting pieces (4) which can slide along its axial direction, and each of the upper connecting pieces (4) is rotatably provided with an upper guide tube (5), and the rotation axis of the upper guide tube (5) is perpendicular to the axis of the upper branch guide rod (2); The lower guide rod (3) is provided with a lower connecting piece (6) which can slide along its axial direction, and the lower connecting piece (6) is rotatably provided with a lower guide tube (7), and the rotation axis of the lower guide tube (7) is perpendicular to the axis of the lower guide rod (3); The upper guide tube (5) and the lower guide tube (7) are oriented in opposite directions, and the upper connecting member (4) can rotate on the upper branch guide rod (2), and the lower connecting member (6) can rotate on the lower branch guide rod (3); The upper sub-guide rod (2) and the lower sub-guide rod (3) slide on the main guide rod (1) to adjust the horizontal positions of the upper guide tube (5) and the lower guide tube (7) respectively; The upper connecting member (4) can slide independently on the upper branch guide rod (2) and adjust the position of the upper guide tube (5), and the lower connecting member (6) can slide independently on the lower branch guide rod (3) and adjust the vertical position of the lower guide tube (7); Furthermore, the upper connecting member (4) can independently rotate on the upper branch guide rod (2) and adjust the guide angle of the upper guide tube (5), while the lower connecting member (6) can independently rotate on the lower branch guide rod (3) and adjust the guide angle of the lower guide tube (7).

2. A femoral neck fracture internal fixation screw guide according to claim 1, characterized in that: Two main sliding sleeves (11) are slidably arranged on the main guide rod (1), and the upper branch guide rod (2) and the lower branch guide rod (3) are respectively vertically fixed on the outer walls of the two main sliding sleeves (11); Wherein, the two main sliding sleeves (11) are both capable of rotating around the axis of the main guide rod (1).

3. A femoral neck fracture internal fixation screw guide according to claim 1 or 2, characterized in that: The upper connecting member (4) comprises an upper sliding sleeve (41) which can slide and rotate on the upper branch guide rod (2); an upper guide sleeve (42) is fixed on the outer wall of the upper sliding sleeve (41), and the upper guide tube (5) is rotatably mounted in the upper guide sleeve (42); Wherein, the axis of the upper guide sleeve (42) is skewed and perpendicular to the axis of the upper sliding sleeve (41).

4. A femoral neck fracture internal fixation screw guide according to claim 3, characterized in that: The lower connecting member (6) comprises a lower sliding sleeve (61) which can slide and rotate on the lower branch guide rod (3); a lower guide sleeve (62) is fixed on the outer wall of the lower sliding sleeve (61), and the lower guide tube (7) is rotatably mounted in the lower guide sleeve (62); The axis of the lower guide sleeve (62) is skewed and perpendicular to the axis of the lower sliding sleeve (61).

5. The femoral neck fracture internal fixation screw guide according to claim 4, characterized in that: An upper extension rod (51) is provided on the upper guide tube (5), and the upper extension rod (51) is slidably and rotatably arranged in the upper guide sleeve (42); The lower guide tube (7) is provided with a lower extension rod (71), and the lower extension rod (71) is slidably and rotatably arranged in the lower guide sleeve (62).

6. The femoral neck fracture internal fixation screw guide according to claim 1, characterized in that: A fixing member (12) is provided on the main guide rod (1), and the fixing member (12) is located at the middle part or the end part of the main guide rod (1).

Images