CN216167689U

CN216167689U - Distal femur osteotomy positioning device

Info

Publication number: CN216167689U
Application number: CN202122348901.8U
Authority: CN
Inventors: 胡方遒; 陈园园; 黄欢欢; 孙延东
Original assignee: Suzhou Microport Orthorecon Co Ltd
Current assignee: Suzhou Microport Orthorecon Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-04-05
Anticipated expiration: 2031-09-27

Abstract

The utility model relates to a distal femur osteotomy positioning device, which comprises a rotating sleeve, a locking knob and a fixed seat, wherein a clamping structure is arranged at the proximal end of the rotating sleeve, and a plurality of clamping pieces are distributed at intervals in the circumferential direction of the clamping structure; the locking knob is provided with a threaded hole and a conical cavity communicated with the threaded hole, the threaded hole is in threaded connection with the rotating sleeve, when the locking knob is rotated to enable the locking knob to move along the axial direction of the rotating sleeve, the side wall of the conical cavity radially extrudes the clamping structure, so that the clamping pieces clamp the intramedullary positioning rod located in the cavity inwards, and the fixing seat is connected with the far end of the rotating sleeve. The distal femur osteotomy positioning device realizes the relative fixation of the distal femur osteotomy positioning device and the intramedullary positioning rod, so as to effectively improve the stability of osteotomy operation, reduce osteotomy errors and further realize the purpose of accurate osteotomy.

Description

Distal femur osteotomy positioning device

Technical Field

The utility model relates to the technical field of auxiliary instruments for orthopedic operations, in particular to a femur distal end osteotomy positioning device.

Background

The distal femur osteotomy is one of the most important steps in the total knee replacement surgery, and the anatomical structure and the degree of wear of the articular surface of the femur are different from patient to patient, so that the accurate osteotomy positioning by the distal femur osteotomy positioning device is very important for the distal femur osteotomy.

Currently, in total knee replacement surgery, a distal femur osteotomy positioning device is used for positioning osteotomy by inserting an intramedullary positioning rod into a femoral medullary cavity and matching the distal femur osteotomy positioning device. And adjusting the valgus angle through the distal femur osteotomy positioning device according to the positioning of the intramedullary positioning rod and the femoral medullary cavity to perform distal femur osteotomy, wherein the term "valgus angle" refers to the angle between the body axis and the considered channel. In the case of a femur, the valgus angle is the angle formed between the mechanical and anatomical axes of the patient; in the case of a femoral distal resection locator, the valgus angle refers to the angle between the femoral distal resection locator axis and the corresponding channel.

However, when the existing distal femur osteotomy positioning device is used for osteotomy, the femoral osteotomy module is easy to shift, thereby causing osteotomy errors.

SUMMERY OF THE UTILITY MODEL

Therefore, the distal femur osteotomy positioning device is provided to solve the problem of how to reduce osteotomy errors.

The utility model provides a distal femur osteotomy positioning device, comprising:

the rotating sleeve is provided with a cavity extending along the axial direction of the rotating sleeve, the cavity is used for inserting an intramedullary positioning rod, a clamping structure is arranged at the near end of the rotating sleeve, and a plurality of clamping pieces are distributed at intervals in the circumferential direction of the clamping structure;

the locking knob is provided with a threaded hole and a conical cavity communicated with the threaded hole, the threaded hole is used for being in threaded connection with the rotating sleeve, when the locking knob is rotated to enable the locking knob to move towards the far end along the axial direction of the rotating sleeve, the side wall of the conical cavity radially presses the clamping structure, so that the clamping pieces clamp the intramedullary positioning rod in the cavity inwards; and

and the fixed seat is connected with the far end of the rotating sleeve.

Above-mentioned thighbone distal end cuts bone positioner, locking knob including screw-thread fit with rotate the cover, the locking knob has the toper chamber, the near-end that rotates the cover is provided with clamping structure, make locking knob along the axial displacement who rotates the cover through rotating the locking knob, make the lateral wall radial extrusion clamping structure in toper chamber, thereby clamping structure's a plurality of clamping pieces inside clamp is located the intramedullary locating lever of cavity, realized cutting thighbone distal end cuts bone positioner and intramedullary locating lever relatively fixed, in order to avoid thighbone to cut the bone when operation, the relative intramedullary locating lever of thighbone distal end cuts bone positioner rotates, thereby improve effectively and cut bone operating stability, reduce the osteotomy error, then realize the purpose of accurate osteotomy.

In one embodiment, the rotating sleeve is provided with an annular groove corresponding to the far end position of the clamping structure.

In one embodiment, the fixed seat comprises a base and a chuck, the distal end of the rotating sleeve is rotatably connected with the base, and the chuck is used for cooperating with the rotating sleeve to limit the rotation of the rotating sleeve relative to the base.

In one embodiment, the distal femur osteotomy positioning device comprises a cutting sleeve, the cutting sleeve is sleeved on the proximal end of the rotating sleeve, the cutting sleeve is provided with a latch, the end surface of the chuck is provided with a plurality of latch grooves, and the latch grooves are used for being engaged with the latch.

In one embodiment, the chuck is provided with a plurality of scale marks, and the plurality of scale marks correspond to the plurality of gear clamping grooves one to one.

In one embodiment, the locking knob is rotatably coupled to the sleeve, and when the locking knob is rotated relative to the rotating sleeve, the locking knob moves axially along the rotating sleeve and drives the sleeve to move axially toward or away from the chuck relative to the rotating sleeve.

In one embodiment, a resilient member is included and is disposed between the rotating sleeve and the ferrule such that the ferrule has a tendency to move distally relative to the rotating sleeve.

In one of them embodiment, the elastic component includes the spring, the cutting ferrule is equipped with the ladder groove, the ladder groove is used for holding the rotating sleeve with the spring, the inner wall in ladder groove is the step face to be formed with and support and hold the wall, the spring spacing in the screw thread structure of rotating the cover with support and hold between the wall.

In one embodiment, a first matching hole is formed in the far end of the locking knob along the axial direction of the locking knob, the first matching hole is communicated with the conical cavity through the threaded hole, a boss is arranged on the side wall of the first matching hole, a convex edge is arranged on the clamping sleeve, and the clamping sleeve is sleeved under the elastic action of the elastic piece, so that the convex edge is abutted against and limited on the boss.

In one embodiment, the base is provided with a slot, and the distal end of the rotating sleeve is positioned in the slot.

In one embodiment, when the rotating sleeve is in contact with one side wall of the slot, the rotating sleeve rotates relative to the rotating sleeve to be in contact with the other side wall of the slot, and the rotating angle of the rotating sleeve ranges from 5 ° to 20 °.

In one embodiment, the device comprises a guider, the guider comprises a deformation rod and a positioning rod, the base is provided with 2 positioning holes which are vertically communicated, and the deformation rod and the positioning rod are respectively arranged in the 2 positioning holes in a penetrating mode.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a cross-sectional view of an embodiment of a femoral distal resection positioning device;

FIG. 2 is a schematic view of the connection between the distal femur osteotomy positioning device and the intramedullary positioning rod according to one embodiment

FIG. 3 is an exploded view of an embodiment of a femoral distal resection positioning device;

FIG. 4 is an assembly view of an embodiment of a femoral distal resection positioning device.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

As previously mentioned, the term "valgus angle" refers to the angle between the body axis and the channel in question. In the case of a femur, the valgus angle is the angle formed between the mechanical and anatomical axes of the patient; in the case of a distal femoral resection positioning device, the valgus angle refers to the angle between the axis of the distal femoral resection positioning device and the corresponding channel, wherein the axis of the distal femoral resection positioning device refers to the axis of the rotating sleeve as in the distal femoral resection positioning device shown in fig. 3.

Further, in the medical instrument, the end away from the operator is the "distal end", and the end close to the operator is the "proximal end". For example, fig. 3 shows a femoral distal osteotomy positioning device in which the right end of the locking knob is the "distal end of the locking knob".

The axial direction refers to the length direction of the element, for example, in the distal femur osteotomy positioning device shown in fig. 3, the length direction of the rotating sleeve, i.e. the left-right direction, defines the axial direction of the rotating sleeve, the radial direction refers to the direction perpendicular to the axial direction, and correspondingly, the circumferential direction refers to the surrounding direction taking the axial direction as the center line.

Referring to fig. 1 and 2, an embodiment of the present invention provides a distal femur osteotomy positioning device 100, which includes a locking knob 20, a rotating sleeve 10 and a fixing base 30.

The rotating sleeve 10 has a cavity 10a extending in its axial direction, and the cavity 10a is disposed so that the rotating sleeve 10 can be inserted into the intramedullary rod 200 (see fig. 2).

Referring to fig. 3, the proximal end of the rotating sleeve 10 is provided with a clamping structure 11 for fixing the intramedullary rod 200, the distal end of the rotating sleeve 10 is connected to the fixing seat 30, and the fixing seat 30 is used for fixing the distal femur osteotomy positioning device 100 to the femur.

The circumference interval distribution of clamping structure 11 has a plurality of clamping pieces 11b, like this when clamping structure 11 receives radial extrusion force, a plurality of clamping pieces 11b assemble to clamping structure 11's middle part and press from both sides and hold together in order to carry out the centre gripping location to intramedullary locating lever 200 that is located cavity 10a, the distal femur osteotomy positioner 100 and intramedullary locating lever 200 relatively fixed have been realized, in order to avoid the femur to cut when operating, the distal femur is cut the relative intramedullary locating lever 200 of positioner 100 and is rotated, thereby improve effectively and cut bone operating stability, reduce and cut the bone error, then realize the purpose of accurate osteotomy. Preferably, the holding structure 11 is a conical umbrella-shaped structure, and a plurality of dividing grooves 11a are circumferentially distributed on the conical umbrella-shaped structure so as to be divided by the plurality of dividing grooves 11a to form a plurality of clamping pieces 11 b. The holding structure 11 may also be of other shapes as long as it can contract inwards after being subjected to radial pressure, for example, it may be a collapsible structure, or a compressible elastomer, etc.

An annular groove 12 is formed in the rotating sleeve 10 corresponding to the distal end of the clamping structure 11, specifically, a groove is formed at the joint of the plurality of clamping pieces 11b and the main body of the rotating sleeve 10, and the grooves corresponding to the plurality of clamping pieces 11b jointly form the annular groove 12. Through the structure arrangement, the groove is formed between the clamping piece 11b and the main body of the rotating sleeve 10, so that the main body of the clamping piece 11b relative to the rotating sleeve 10 is easily bent at the corresponding position of the groove, and then when the clamping structure 11 is subjected to radial extrusion force, elastic deformation is more easily generated, so that the intramedullary positioning rod 200 is clamped inwards by utilizing the clamping pieces 11b of the clamping structure 11 better, the rotating sleeve 10 and the intramedullary positioning rod 200 are relatively fixed, the bone cutting operation stability is improved, and the bone cutting error is reduced.

The locking knob 20 is provided with a threaded hole 21 and a tapered cavity 22 communicating with the threaded hole 21. Wherein the threaded hole 21 is in threaded connection with the rotating sleeve 10, and the tapered cavity 22 is used for radially compressing the clamping structure 11, so that the clamping pieces 11b of the clamping structure 11 clamp the intramedullary rod 200 inwards.

Specifically, as shown in fig. 2 and 3, the rotating sleeve 10 is provided with a threaded structure 13, and the threaded structure 13 is in threaded engagement with the threaded hole 21 of the locking knob 20, so that the plurality of clamping pieces 11b of the clamping structure 11 are in contact with the side wall of the conical cavity 13. Therefore, when the locking knob 20 is rotated, the threaded structure 13 is matched with the thread of the threaded hole 21, so that the locking knob 20 moves axially along the rotating sleeve 10, the radial extrusion force of the side wall of the conical cavity 13 of the locking knob 20 on the clamping structure 11 is adjusted, and the clamping structure 11 is controllably operated to clamp or loosen the intramedullary positioning rod 200.

The outer surface of locking knob 20 may be knurled, slotted, or otherwise formed to prevent slippage, to facilitate rotational manipulation of locking knob 20.

As shown in fig. 3, the fixing base 30 includes a base 31 and a chuck 32. The chuck 32 and the base 31 may be connected by pins 10c, interference fit or integral machining. The chuck 32 is adapted to cooperate with the rotating sleeve 10 to restrict rotation of the rotating sleeve 10 relative to the base 31, thereby locking the valgus angle.

As shown in fig. 2 to 4, the distal end of the rotating sleeve 10 is rotatably connected to the base 31 to adjust the valgus angle to meet the requirements of distal femur osteotomy.

In some embodiments, the base 31 is provided with a slot 31a, and the distal end of the rotating sleeve 10 is located in the slot 31a, so that the side wall of the slot 31a is used to limit the rotation angle of the rotating sleeve 10 relative to the base 31 within a certain range, i.e. to allow the rotating sleeve 10 to rotate relative to the base 31 within a certain angle range.

In some embodiments, the rotating sleeve 10 can rotate within a range of ± 5 ° relative to the base 31, wherein the position of the rotating sleeve 10 when being perpendicular to the base 31 is taken as an initial position, that is, the rotation angle is 0 °, so that the rotating sleeve 10 rotates within a range of ± 5 °, which means that the maximum angle at which the rotating sleeve 10 can rotate from the initial position to any side relative to the base 31 is 5 °.

In other embodiments, the rotating sleeve 10 can rotate within ± 20 ° relative to the base 31, and at this time, the maximum angle that the rotating sleeve 10 can rotate from the initial position to either side relative to the base 31 is 20 °. The maximum rotation angle of the rotating sleeve 10 relative to the base 31 may also be 10 °, 15 ° or 30 °, which is not limited herein.

It should be noted that the maximum angle that the rotating sleeve 10 can rotate from the initial position to the different sides with respect to the base 31 may be equal or different, for example, the maximum angle that the rotating sleeve 10 can rotate from the initial position to one side with respect to the base 31 is 5 °, and the maximum angle that the rotating sleeve can rotate to the other side is 15 °.

In some embodiments, when the rotating sleeve 10 contacts one side wall of the insertion slot 31a, the rotating sleeve 10 rotates relative to the rotating sleeve 10 to contact the other side wall of the insertion slot 31a, and the rotating angle of the rotating sleeve 10 ranges from 5 ° to 20 °, for example, 5 °, 15 °, 18 °, or 20 °. Within the angle range, the requirement of adjusting the eversion angle by rotating the rotating sleeve 10 relative to the base 31 can be met, and meanwhile, the limit of the side wall of the slot 31a on the rotating angle of the rotating sleeve 10 is utilized to avoid overlarge rotating angle and easily cause safety accidents when the operation is out of control.

As shown in fig. 2 and 3, the base 31 is provided with a through hole 31b penetrating and communicating with the slot 31a, and the distal end of the rotating sleeve 10 is provided with a pin hole 10b, so that when the distal end of the rotating sleeve 10 is inserted into the slot 31a, the pin 10c penetrating the pin hole 10b is rotatably connected with the through hole 31b of the base 31, so that the rotating sleeve 10 can rotate around the pin 10c relative to the base 31.

The distal femur osteotomy positioning device 100 comprises a cutting sleeve 40, wherein the cutting sleeve 40 is sleeved on the proximal end of the rotating sleeve 10 and cooperates with the chuck 32 to limit the rotation of the rotating sleeve 10 relative to the base 31, thereby realizing the locking of the rotational freedom of the rotating sleeve 10 relative to the base 31.

Specifically, the ferrule 40 is provided with a latch 41; the end face of the chuck 32 is provided with a plurality of chuck grooves 32a, and the chuck grooves 32a are used for being meshed with the chuck teeth 41, so that the rotating sleeve 10 connected with the chuck sleeve 40 is limited on the chuck 32, namely, the rotating sleeve 10 cannot rotate relative to the base 31, and the purpose of locking the eversion angle is achieved.

In some embodiments, the chuck 32 is provided with a plurality of graduations 32b for marking the rotation angle and direction of the rotating sleeve 10 relative to the base 31. The graduation marks 32b may be formed on the chuck 32 by engraving or printing, etc.

The plurality of scale marks 32b correspond to the plurality of detent grooves 32a one-to-one, so that when the latch 41 of the ferrule 40 is engaged with one of the detent grooves 32a, the current rotation angle and direction of the rotating sleeve 10 relative to the base 31 can be visually confirmed according to the scale mark 32b corresponding to the detent groove 32 a.

It should be noted that the locking knob 20 is rotatable relative to the ferrule 40 to ensure that the rotational function of the locking knob 20 relative to the threaded formation 13 of the rotating sleeve 10 is not disturbed.

As shown in fig. 1-3, in some embodiments, the femoral distal resection positioning device 100 includes a spring 50 that uses the spring 50 to cause the ferrule 40 to have a tendency to move distally relative to the rotating sleeve 10 and to couple the ferrule 40 to the locking knob 20. Specifically, when the locking knob 20 rotates relative to the rotating sleeve 10, the locking knob 20 moves axially along the rotating sleeve 10, and the ferrule 40 is kept in linkage with the locking knob 20 under the action of the spring 50, so as to move axially closer to or away from the chuck 32 along with the locking knob 20 relative to the rotating sleeve 10, and controllably engage or disengage the latch teeth 41 of the ferrule 40 with or from the latch grooves 32a of the chuck 32.

Further, the ferrule 40 is provided with a stepped groove 40a, the stepped groove 40a is used for accommodating the rotating sleeve 10 and the spring 50, and the inner wall of the stepped groove 40a is a stepped surface and is formed with an abutting wall 40 b. The spring 50 and the cutting ferrule 40 are sequentially installed from the far end of the rotating sleeve 10 and move along the axial direction of the rotating sleeve 10 until the abutting wall 40b pushes the spring 50 to move along the axial direction of the rotating sleeve 10, and finally the spring 50 abuts against the thread structure 13 of the rotating sleeve 10, so that the spring 50 is limited between the thread structure 13 of the rotating sleeve 10 and the abutting wall 40b of the stepped groove 40 a.

In other embodiments, the ferrule 40 may be formed by other elastic members such as an elastic rod, an elastic rod or an elastic sheet to engage the latch 41 with the latch groove 32a of the chuck 32, and when the locking knob 20 moves toward the proximal end with respect to the rotating sleeve 10, the locking knob 20 can link the ferrule 40 to overcome the elastic force of the elastic members to separate the latch 41 from the latch groove 32 a.

Referring again to fig. 1 and 2, in some embodiments, the distal end of the locking knob 20 is provided with a first fitting hole 23 along the axial direction thereof, the first fitting hole 23 is communicated with the tapered cavity 22 through the threaded hole 21, so that when the locking knob 20 is assembled to the rotating sleeve 10, the proximal end of the rotating sleeve 10 extends from the first fitting hole 23, finally the threaded structure 13 of the rotating sleeve 10 is moved to the threaded hole 21, by rotating the locking knob 20, the locking knob 20 can be connected with the rotating sleeve 10 through the threaded fit of the threaded structure 13 and the threaded hole 21, and the clamping structure 11 extends into the tapered cavity 22, so that when the locking knob 20 is rotated to move the locking knob 20 along the rotating sleeve 10 towards the distal end, the side wall of the tapered cavity 22 radially presses the clamping structure 11, so that the clamping structure 11 clamps the intramedullary rod 200 penetrating through the rotating sleeve 10, and the rotating sleeve 10 is relatively fixed with the intramedullary rod 200, the stability of the osteotomy operation is improved, so that the osteotomy error is reduced.

In some embodiments, the side wall of the first mating hole 23 of the locking knob 20 is provided with a boss 24 for catching the ferrule 40, so that the ferrule 40 is kept in linkage connection with the locking knob 20 by the elastic force of the spring 50.

Specifically, as shown in fig. 2 and 3, the sleeve 40 is provided with a convex edge 42, the locking knob 20 is matched with the convex edge 42 through the boss 24, specifically, the sleeve 40 has a moving trend away from the locking knob 20 under the elastic force of the spring 50, and the convex edge 42 is abutted against and limited on the boss 24, and then, when the locking knob 20 moves axially along the rotating sleeve 10, the sleeve 40 moves together with the locking knob 20, that is, the sleeve 40 and the locking knob 20 are linked.

In other embodiments, the locking knob 20 may also be provided with other locking platforms or insertion pins to realize the locking of the ferrule 40, so that the ferrule 40 and the locking knob 20 are linked.

In some embodiments, when the locking knob 20 is rotated to move the locking knob 20 proximally, the locking knob 20 drives the ferrule 40 to move proximally and compress the spring 50, so that the latch 41 is separated from the latch slot 32a of the chuck 32 to release the restriction on the rotating sleeve 10, so that the rotating sleeve 10 can rotate around the pin 10c by a certain angle relative to the base 31 to adjust the valgus angle.

Accordingly, when the locking knob 20 is moved distally by rotating the locking knob 20, the ferrule 40 is pushed by the spring 50 to move distally, so that the latch 41 latches the latch groove 32a of the chuck 32, and the rotation of the rotating sleeve 10 relative to the base 31 is restricted, thereby locking the adjusted valgus angle.

It should be noted that, since, when the locking knob 20 is moved distally by rotating the locking knob 20, the locking knob 20 is moved distally relative to the rotating sleeve 10, so that when moved so that the inner wall of the conical cavity 22 of the locking knob 20 abuts the clamping structure 11, as locking knob 20 continues to be rotated, and as locking knob 20 moves proximally, tapered cavity 22 compresses gripping structure 11 of rotating sleeve 10, so that the plurality of clamping pieces 11b of the clamping structure 11 converge toward the middle of the clamping structure 11 to clamp the intramedullary rod 200, thereby locking the rotating sleeve 10 and the intramedullary positioning rod 200, realizing the relative fixation of the distal femur osteotomy positioning device 100 and the intramedullary positioning rod 200, when the femur osteotomy operation is avoided, the femur distal end osteotomy positioning device 100 rotates relative to the intramedullary positioning rod 200, so that the stability of the osteotomy operation is effectively improved, and the purpose of accurate osteotomy is realized.

In some embodiments, as shown in fig. 3 and 4 in combination, the distal femoral resection positioning device 100 includes a guide 60, the base 31 is connected to the guide 60, and the guide 60 includes a positioning rod 61 and a deformation rod 62.

The base 31 is provided with 2 positioning holes 31c which are penetrated up and down (namely along the direction vertical to the plane where the rotation of the rotating sleeve 10 is positioned), and the positioning rod 61 and the deformation rod 62 are respectively matched with the positioning holes 31c of the base 31; wherein, the positioning rod 61 plays a guiding and positioning role, and the deformation rod 62 plays a role in adjusting the gap.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A femoral distal osteotomy positioning device, comprising:

and the fixed seat is connected with the far end of the rotating sleeve.

2. The femoral distal osteotomy positioning device of claim 1, wherein said rotating sleeve is provided with an annular groove disposed at a distal location relative to said gripping formation.

3. The femoral distal osteotomy positioning device of claim 1, wherein said anchor block includes a base and a chuck, said rotating sleeve having a distal end rotatably coupled to said base, said chuck being adapted to cooperate with said rotating sleeve to limit rotation of said rotating sleeve relative to said base.

4. The distal femoral resection positioning device of claim 3, wherein the distal femoral resection positioning device comprises a cutting sleeve, the cutting sleeve is sleeved on the proximal end of the rotating sleeve, the cutting sleeve is provided with a plurality of teeth, the end surface of the chuck is provided with a plurality of tooth grooves, and the tooth grooves are used for being engaged with the teeth.

5. The distal femoral resection positioning device of claim 4, wherein the chuck is provided with a plurality of graduation marks, and the plurality of graduation marks correspond to the plurality of tooth clamping grooves one to one.

6. The femoral distal osteotomy positioning device of claim 4, wherein said locking knob is rotatably coupled to said cutting sleeve, said locking knob axially moving along said rotating sleeve and moving said cutting sleeve axially toward or away from said chuck relative to said rotating sleeve when said locking knob is rotated relative to said rotating sleeve.

7. The femoral distal resection positioning device of claim 4 comprising a resilient member disposed between the rotating sleeve and the cutting sleeve such that the cutting sleeve has a tendency to move distally relative to the rotating sleeve.

8. The distal femoral osteotomy positioning device of claim 7, wherein said resilient member comprises a spring, said cutting sleeve is provided with a stepped groove for accommodating said rotating sleeve and said spring, an inner wall of said stepped groove is stepped and formed with a retaining wall, said spring is limited between a threaded structure of said rotating sleeve and said retaining wall.

9. The distal femoral osteotomy positioning device of claim 7, wherein the distal end of the locking knob has a first mating hole along an axial direction thereof, the first mating hole is communicated with the tapered cavity through the threaded hole, a boss is disposed on a side wall of the first mating hole, the cutting sleeve has a convex edge, and the cutting sleeve is under an elastic force of the elastic member so that the convex edge is abutted against and limited on the boss.

10. The femoral distal osteotomy positioning device of claim 3, wherein said base defines a slot, said rotating sleeve distal end being positioned within said slot.

11. The femoral distal osteotomy positioning device of claim 10, wherein said rotating sleeve rotates relative to said rotating sleeve to contact one sidewall of said socket when in contact with said one sidewall of said socket, said rotating sleeve rotating at an angle in a range of 5 ° to 20 °.

12. The distal femoral osteotomy positioning device of claim 3, comprising a guide, wherein the guide comprises a deformation rod and a positioning rod, the base is provided with 2 positioning holes which are vertically through, and the deformation rod and the positioning rod are respectively arranged in the 2 positioning holes.