Femoral lifter

Abstract

The invention discloses a femur lifter, and relates to the field of orthopedic reduction auxiliary instruments, the femur lifter comprises a support seat, the top of the support seat is used for supporting a thigh, the bottom of the support seat is provided with a clamping block, and the periphery of the clamping block is provided with a first external thread; the base is placed on the operating bed, a clamping hole matched with the clamping block is formed in the top of the base, a second external thread is arranged on the periphery of the clamping hole, and the thread direction of the second external thread is opposite to that of the first external thread; the adjusting nut is arranged between the supporting seat and the base in a threaded connection mode, and a first internal thread and a second internal thread are arranged in the adjusting nut; according to the lifter, the supporting seat can ascend and descend by screwing the adjusting nut, so that the thighbone position is driven to be adjusted up and down, and the coaxiality of the near end and the far end is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of orthopedic reduction auxiliary instruments, and more specifically, relates to a femoral elevator. Background Art

[0002] After a femoral fracture, due to the traction of soft tissues such as muscles and the stagnation of hard bones, a large force is generally required for reduction during surgery. Doctors usually use a traction device to separate the fracture first, and then reduce it manually or using a surgical robot. Although the traction device can resist most muscle tension, the traction force of the traction device cannot completely oppose the combined force of multiple muscles. Therefore, the axis at the distal end of the femur will inevitably not be coaxial with the proximal end, and usually appears to be warped up or down. In this way, a device is needed to correct the problem of warping up or down to ensure that the proximal and distal ends of the femur are in a coaxial state. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies in the prior art and to provide a femoral lifter that can support the lifting and lowering of a seat by screwing an adjusting nut, thereby driving the upward and downward adjustment of the femoral position to ensure the coaxiality of the proximal and distal ends.

[0004] In order to achieve the above object, the present invention provides a femoral elevator, comprising:

[0005] A support seat, the top of which is used to support the thigh, the bottom of which is provided with a clamping block, and the outer periphery of which is provided with a first external thread;

[0006] A base is placed on the operating table, wherein a clamping hole matching with the clamping block is arranged on the top of the base, a second external thread is arranged on the outer periphery of the clamping hole, and the thread directions of the second external thread and the first external thread are opposite to each other;

[0007] The adjusting nut is threadedly arranged between the supporting seat and the base, and a first internal thread and a second internal thread are arranged in the adjusting nut.

[0008] Optionally, a circular arc concave surface is centrally arranged on the top of the support seat, and strap connection ports are respectively arranged at both ends of the circular arc concave surface.

[0009] Optionally, a first protrusion is provided on the top of the base, the first protrusion is a cylindrical shell, the second external thread is provided on the outer circumference of the first protrusion, the clamping hole is provided on the top of the first protrusion, the clamping hole is connected to the inner cavity of the first protrusion, and the clamping block extends through the clamping hole into the inner cavity of the first protrusion.

[0010] Optionally, a limit screw is provided in the inner cavity of the first protrusion, the limit screw is connected to the bottom threaded hole of the clamping block, and the outer circumference of the limit screw is larger than the aperture size of the clamping hole.

[0011] Optionally, a second protrusion is centrally arranged on the top of the first protrusion, the outer circumference of the second protrusion is cylindrical, the engaging hole is centrally arranged on the top of the second protrusion, and the second protrusion is smaller than the cross section of the first protrusion.

[0012] Optionally, an annular portion is provided at the bottom of the support seat, the first external thread is provided on the outside of the annular portion, and a uniform gap exists between the inside of the annular portion and the clamping block, and the gap is used to accommodate the second protrusion.

[0013] Optionally, the adjusting nut is provided with a backing groove in a region between the first internal thread and the second internal thread.

[0014] Optionally, a plurality of interfaces are evenly arranged on the outer circumference of the adjusting nut, and the interfaces are used to connect the rotating handle.

[0015] Optionally, the first external thread is a right-handed external thread, and the second external thread is a left-handed external thread.

[0016] The present invention provides a femoral lifter, which has the beneficial effects of: the femoral lifter has a clamping block and a clamping hole on the support seat and the base respectively. When the two are connected and fixed, the two cannot rotate relative to each other. When the height of the support seat needs to be adjusted, it is only necessary to rotate the adjusting nut. The lifter has a simple structure and is easy to adjust.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0019] Figure 1 A schematic structural diagram of a femoral elevator according to an embodiment of the present invention is shown.

[0020] Figure 2 A structural cross-sectional view of a femoral elevator according to an embodiment of the present invention is shown.

[0021] Figure 3 An exploded view of the parts of a femoral elevator according to an embodiment of the present invention is shown.

[0022] Figure 4 Shows Figure 3 Cross-sectional view of .

[0023] Figure 5 A diagram showing a connection state of a femoral elevator in use according to an embodiment of the present invention is shown.

[0024] Description of reference numerals:

[0025] 1. Support seat; 2. Snap-on block; 3. Base; 4. Snap-on hole; 5. Adjustment nut; 6. Strap connection port; 7. Limit screw; 8. Knife withdrawal groove; 9. Interface; 10. Thigh; 11. Operating table. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0027] The present invention provides a femoral elevator, comprising:

[0028] A support seat, the top of which is used to support the thigh, a clamping block is provided at the bottom of the support seat, and a first external thread is provided at the outer periphery of the clamping block;

[0029] The base is placed on the operating table, the top of the base is provided with a clamping hole matched with the clamping block, the outer periphery of the clamping hole is provided with a second external thread, and the thread direction of the second external thread is opposite to that of the first external thread;

[0030] The adjusting nut is threadedly arranged between the supporting seat and the base, and a first internal thread and a second internal thread are arranged in the adjusting nut.

[0031] Specifically, the femoral lifter is fixed to the operating table through a base, and one end of the thigh is supported by a support seat. Since the support seat and the base are fixed by a clip-on method, the support seat and the base cannot rotate relative to each other, and the two can only move relative to each other along the height direction; in addition, an adjusting nut is arranged between the support seat and the base, and two sections of internal threads with opposite thread directions are arranged at the upper and lower ends of the adjusting nut, respectively, and are threadedly connected to the support seat and the base. When the support height of the thigh needs to be adjusted, it can be achieved by simply rotating the adjusting nut, and the adjustment process is simple and quick.

[0032] Optionally, a circular arc concave surface is arranged in the center of the top of the support seat, and strap connection ports are respectively arranged at both ends of the circular arc concave surface.

[0033] Specifically, in order to ensure stable support for the thigh, the thigh is positioned by the arc concave surface in the middle, and then straps are installed through strap connection ports at both ends of the support seat to bind and restrain the thigh so that the thigh can be raised and lowered with the support seat.

[0034] Optionally, a first protrusion is provided on the top of the base, the first protrusion is a cylindrical shell, the second external thread is provided on the outer circumference of the first protrusion, the snap-in hole is provided on the top of the first protrusion, the snap-in hole is connected to the inner cavity of the first protrusion, and the snap-in block extends through the snap-in hole into the inner cavity of the first protrusion.

[0035] Optionally, a limit screw is provided in the inner cavity of the first protrusion, and the limit screw is connected to the bottom threaded hole of the clamping block, and the outer circumference of the limit screw is larger than the aperture size of the clamping hole.

[0036] Specifically, the base is provided with a first cylindrical protrusion in the middle part, and the first protrusion is an internal hollow structure. When the clamping block of the support seat is inserted into the clamping hole of the base, the base and the support seat will not rotate in the horizontal direction, and a limiting screw is connected to the end of the clamping block located in the clamping hole. When the support seat moves away from the base, the limiting screw can prevent the clamping block from separating from the clamping hole, thereby preventing the support seat for fixing the thigh from not being limited and allowing the thigh to move with the body.

[0037] Optionally, a second protrusion is centrally arranged on the top of the first protrusion, the outer circumference of the second protrusion is cylindrical, the clamping hole is centrally arranged on the top of the second protrusion, and the second protrusion is smaller than the cross section of the first protrusion.

[0038] Optionally, an annular portion is provided at the bottom of the support seat, the first external thread is provided on the outside of the annular portion, and a uniform gap exists between the inside of the annular portion and the clamping block, and the gap is used to accommodate the second protrusion.

[0039] Specifically, the first protrusion and the second protrusion on the base have a gradually tapering effect from bottom to top. When the support seat is installed on the base, the clamping block is inserted into the clamping hole, and the annular portion is on the outer periphery of the second protrusion, so that the first external thread on the support seat and the second external thread on the base are on the same circumferential surface. When the adjusting nut is rotated, the support seat and the base can be moved towards or away from each other at the same time, thereby driving the femur to be adjusted up and down.

[0040] Optionally, the adjusting nut is provided with a back-off groove in a region between the first internal thread and the second internal thread.

[0041] Optionally, a plurality of interfaces are evenly arranged on the outer circumference of the adjusting nut, and the interfaces are used to connect the rotating handle.

[0042] Specifically, a first internal thread and a second internal thread are respectively arranged on the inner sides of both ends of the adjusting nut, so that the adjusting nut can be screwed to the support seat and the base respectively, and a backing groove is also arranged between the two sections of the internal thread. In this way, when one end of the adjusting nut is screwed to the support seat or the base, there will be no transition of the connection of the adjusting nut, resulting in insufficient length of the exposed thread at the other end.

[0043] Optionally, the first external thread is a right-handed external thread, and the second external thread is a left-handed external thread.

[0044] Specifically, the upper connecting thread of the femoral elevator is set to a right-handed thread, and the lower connecting thread is set to a left-handed thread, so that when the adjusting nut is turned clockwise, the support seat can be moved upward, which conforms to the conventional screw connection adjustment habits.

[0045] Example

[0046] like Figures 1 to 5 As shown, the present invention provides a femoral elevator, comprising:

[0047] A support seat 1, the top of which is used to support the thigh 10, a square clamping block 2 is provided at the bottom of the support seat 1, and a right-handed external thread is provided on the outer periphery of the clamping block 2;

[0048] The base 3 is placed on the operating table 11. The top of the base 3 is provided with a clamping hole 4 that cooperates with the clamping block 2. The outer periphery of the clamping hole 4 is provided with a left-handed external thread.

[0049] The adjusting nut 5 has two ends which are respectively threadedly connected to the supporting seat 1 and the base 3 , and a right-handed internal thread and a left-handed internal thread are arranged inside the adjusting nut 5 .

[0050] In this embodiment, a circular arc concave surface is arranged in the center of the top of the support seat 1, and strap connection openings 6 are arranged at both ends of the circular arc concave surface.

[0051] In this embodiment, a first protrusion is provided on the top of the base 3, and the first protrusion is a cylindrical shell. A left-handed external thread is provided on the outer periphery of the first protrusion, and a second protrusion is provided in the center of the top of the first protrusion. The outer periphery of the second protrusion is cylindrical, and a snap-in hole 4 is provided in the center of the top of the second protrusion. The snap-in hole 4 is connected to the inner cavity of the first protrusion, and the snap-in block 2 extends through the snap-in hole 4 to the inner cavity of the first protrusion.

[0052] In this embodiment, a limit screw 7 is disposed in the inner cavity of the first protrusion, and the limit screw 7 is connected to the bottom threaded hole of the clamping block 2 . The outer circumference of the limit screw 7 is larger than the aperture size of the clamping hole 4 .

[0053] In this embodiment, an annular portion is provided at the bottom of the support seat 1, a right-handed external thread is provided on the outside of the annular portion, and a uniform gap exists between the inside of the annular portion and the clamping block 2, and the gap is used to accommodate the second protrusion.

[0054] In this embodiment, the adjusting nut 5 is provided with an undercut groove 8 in a region between the right-handed internal thread and the left-handed internal thread.

[0055] In this embodiment, a plurality of interfaces 9 are evenly arranged on the outer circumference of the adjusting nut 5 , and the interfaces are used to connect the rotating handle.

[0056] In summary, the femoral lifter includes a support seat 1, an adjusting nut 5, a base 3 and a limit screw 7. If necessary, a strap can be connected to the strap connection port 6 to fix the thigh 10. The support seat 1 is provided with a square clamping block 2, a right-handed external thread and an internal thread that cooperates with the limit screw 7. The two ends of the adjusting nut 5 are provided with a right-handed internal thread and a left-handed internal thread, and a back-off groove 8 is provided between the two internal threads. The outer circumference thereof is evenly provided with interfaces 9 for rotating handles. The base 3 is provided with a clamping hole 4 that cooperates with the clamping block 2 and a left-handed external thread.

[0057] During surgery, the femoral lifter is placed at a suitable position below the femur, and the adjustment nut 5 is rotated by rotating the handle to adjust the thigh position at the distal end of the femur up and down.

[0058] Since the support seat 1 and the base 3 are mutually engaged, the two can only move relative to each other in the vertical direction. When the adjusting nut 5 is rotated clockwise, the support seat moves upward under the action of the left and right threads, and when the adjusting nut 5 is rotated counterclockwise, the support seat moves downward under the action of the left and right threads.

[0059] When assembling the femoral elevator, the limit screw 7 and the support seat 1 need to be tightened. When the adjusting nut 5 is rotated clockwise during the operation, the limit screw 7 contacts the base 3 before reaching the limit position to prevent the support seat 1, the base 3 and the adjusting nut 5 from disengaging.

[0060] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A femoral elevator, characterized in that: include: A support seat, the top of which is used to support the thigh, the bottom of which is provided with a clamping block, and the outer periphery of which is provided with a first external thread; A base is placed on the operating table, wherein a clamping hole matching with the clamping block is arranged on the top of the base, a second external thread is arranged on the outer periphery of the clamping hole, and the thread directions of the second external thread and the first external thread are opposite to each other; The adjusting nut is threadedly arranged between the supporting seat and the base, and a first internal thread and a second internal thread are arranged in the adjusting nut.

2. The femoral elevator according to claim 1, characterized in that A circular arc concave surface is centrally arranged on the top of the support seat, and strap connection ports are respectively arranged at both ends of the circular arc concave surface.

3. The femur elevator according to claim 1, characterized in that: A first protrusion is provided on the top of the base, the first protrusion is a cylindrical shell, the second external thread is provided on the outer circumference of the first protrusion, the clamping hole is provided on the top of the first protrusion, the clamping hole is connected to the inner cavity of the first protrusion, and the clamping block extends through the clamping hole into the inner cavity of the first protrusion.

4. The femoral elevator according to claim 3, characterized in that: A limiting screw is arranged in the inner cavity of the first protrusion, and the limiting screw is connected to the bottom threaded hole of the clamping block, and the outer circumference size of the limiting screw is larger than the aperture size of the clamping hole.

5. The femur elevator according to claim 3, characterized in that: A second protrusion is centrally disposed on the top of the first protrusion, the outer circumference of the second protrusion is cylindrical, the engaging hole is centrally disposed on the top of the second protrusion, and the second protrusion is smaller than the cross section of the first protrusion.

6. The femoral elevator according to claim 5, characterized in that An annular portion is disposed at the bottom of the support seat, the first external thread is disposed on the outside of the annular portion, and a uniform gap exists between the inside of the annular portion and the clamping block, and the gap is used to accommodate the second protrusion.

7. The femur elevator according to claim 1, characterized in that: The adjusting nut is provided with a cutter recess in a region between the first internal thread and the second internal thread.

8. The femur elevator according to claim 1, characterized in that: The outer circumference of the adjusting nut is evenly provided with a plurality of interfaces, and the interfaces are used for connecting the rotating handle.

9. The femur elevator according to claim 1, characterized in that: The first external thread is a right-handed external thread, and the second external thread is a left-handed external thread.

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