阅读说明：本技术 用于治疗股骨骨折的复位支撑组件 (Reduction support assembly for treating femoral fracture ) 是由 何齐芳 朱六龙 占宇 张彬彬 于 2019-09-11 设计创作，主要内容包括：本发明属于医疗器械领域,公开了一种用于治疗股骨骨折的复位支撑组件,包括：髓腔内支撑件,沿第一方向延伸且包括可插装至股骨粗隆部内的第一支撑件近端部和可插装至股骨干内的第一支撑件远端部；股骨颈内支撑件,沿第二方向延伸且包括可插装至股骨颈内的第二支撑件近端部和可插装至股骨粗隆部内的第二支撑件远端部；股骨颈外支撑件,沿第二方向延伸且包括外支撑件远端部和外支撑件近端部；其中,第二支撑件远端部插接在第一支撑件近端部上,外支撑件远端部用于贯穿股骨干的周壁以插接在髓腔内支撑件上,外支撑件近端部用于支撑在股骨颈的底部外侧壁。本发明的复位支撑组件能够稳定地维持股骨骨折部位的复位状态,以更好地促进骨折部位愈合。(The invention belongs to the field of medical appliances, and discloses a reduction support component for treating femoral fracture, which comprises: an intramedullary support extending in a first direction and including a first support proximal portion insertable into the femoral tuberosity and a first support distal portion insertable into the femoral shaft; an internal femoral neck support extending in a second direction and comprising a proximal second support portion insertable into the femoral neck and a distal second support portion insertable into the femoral tuberosity; an outer femoral neck support extending in a second direction and comprising an outer support distal portion and an outer support proximal portion; the distal end part of the second support is inserted on the proximal end part of the first support, the distal end part of the outer support is used for penetrating through the peripheral wall of the femoral shaft to be inserted on the intramedullary support, and the proximal end part of the outer support is used for supporting on the outer side wall of the bottom of the femoral neck. The reduction support component can stably maintain the reduction state of the femoral fracture part so as to better promote the healing of the fracture part.)

1. A reduction support assembly for treating a femoral fracture, the reduction support assembly comprising:

an intramedullary support (1) extending in a first direction (D1) and comprising a first support proximal end insertable into a femoral tuberosity (7) and a first support distal end insertable into a femoral shaft (6);

a femoral neck internal support (2) extending in a second direction (D2) and comprising a second support proximal end insertable into the femoral neck (8) and a second support distal end insertable into the femoral tuberosity (7);

an outer femoral neck support (4) extending in the second direction (D2) and comprising an outer support distal end and an outer support proximal end;

the distal end part of the second support is inserted on the proximal end part of the first support, the distal end part of the outer support is used for penetrating through the peripheral wall of the femoral shaft (6) to be inserted on the intramedullary support (1), and the proximal end part of the outer support is used for being supported on the bottom outer side wall of the femoral neck (8).

2. The reduction support assembly according to claim 1, wherein the outer femoral neck support (4) comprises an external thread formed at least on an outer peripheral wall of the outer support distal end portion, the peripheral wall of the intramedullary support (1) is provided with an outer support insertion hole, an inner peripheral wall of the outer support insertion hole is provided with an internal thread matching the external thread, and the outer support distal end portion is screw-inserted into the outer support insertion hole.

3. The reduction support assembly of claim 2, wherein the outer peripheral wall of the proximal portion of the outer support is formed as a smooth peripheral wall.

4. The reduction support assembly according to claim 1, wherein in the second direction (D2), the outer support proximal end portion for supporting on the bottom outer sidewall of the femoral neck (8) is spaced from a femoral head 9 connected at the proximal end of the femoral neck (8) by no more than half the length of the femoral neck (8).

5. The reduction support assembly according to any one of claims 1 to 4, further comprising a support limiting structure for at least limiting displacement of the femoral neck support (2) relative to the intramedullary support (1) in the second direction (D2).

6. The reduction support assembly according to claim 5, wherein the intramedullary canal supporting member (1) is provided with a supporting member hollow cavity extending along the first direction (D1), the second supporting member distal end portion penetrates through the peripheral wall of the first supporting member proximal end portion and passes through the supporting member hollow cavity, the supporting member limiting structure comprises a plurality of circumferential limiting grooves (21) formed on the peripheral wall of the second supporting member distal end portion and limiting fixing members (5) fixedly inserted in the supporting member hollow cavity, the plurality of circumferential limiting grooves (21) are sequentially arranged at intervals along the second direction (D2), and the inner ends of the limiting fixing members (5) are inserted in the circumferential limiting grooves (21) and are in limiting abutment with the axial groove side walls of the circumferential limiting grooves (21).

7. The reset support assembly according to claim 6, wherein the support limiting structure further comprises a plurality of pivot limiting grooves (22) disposed on the bottom wall of the circumferential limiting groove (21) and arranged at intervals in the circumferential direction, and the inner end of the limiting fixing member (5) is inserted into the pivot limiting groove (22) and is in limiting abutment with the circumferential groove side wall of the pivot limiting groove (22).

8. The reduction support assembly according to claim 5, wherein the intramedullary canal support (1) is provided with a support hollow cavity extending in the first direction (D1), the second support distal end portion penetrates through a peripheral wall of the first support proximal end portion and passes through the support hollow cavity, the support limiting structure comprises a plurality of limiting locking holes (23) formed in a peripheral wall of the second support distal end portion and a limiting fixing member (5) fixedly inserted in the support hollow cavity, and an inner end of the limiting fixing member (5) is inserted in the limiting locking holes (23).

9. The reduction support assembly according to claim 5, wherein the intramedullary support (1) is provided with a support hollow cavity extending along the first direction (D1), the second support distal end portion penetrates through a peripheral wall of the proximal end portion of the first support and penetrates through the support hollow cavity, the peripheral wall of the second support distal end portion is formed with an axial sliding groove (24) extending along the axial direction, and the axial sliding groove (24) is arranged at a distance from the support limiting structure;

wherein the support limiting structure comprises a plurality of limiting grooves formed on the outer peripheral wall of the distal end part of the second support and a limiting fixing piece (5) fixedly inserted in the hollow cavity of the support, and the inner end of the limiting fixing piece (5) is alternatively inserted into the limiting grooves or the axial sliding grooves (24);

or, the support part limiting structure comprises a plurality of limiting locking holes (23) formed on the peripheral wall of the far end part of the second support part and a limiting fixing part (5) fixedly inserted in the hollow cavity of the support part, and the inner end of the limiting fixing part (5) is alternatively inserted into the limiting locking holes (23) or the axial sliding grooves (24).

10. The reduction support assembly according to claim 5, wherein the intramedullary support (1) is provided with a support hollow cavity extending in the first direction (D1), the second support distal end portion penetrates through a circumferential wall of the proximal end portion of the first support and through the support hollow cavity, and an outer circumferential wall of the second support distal end portion is formed with an axial sliding slot (24) extending in the axial direction;

the supporting piece limiting structure comprises a plurality of limiting grooves which are formed in the bottom wall of the axial sliding groove (24) and are sequentially arranged at intervals along the axial direction, and limiting fixing pieces (5) which are fixedly inserted in the hollow cavity of the supporting piece and can be selectively inserted into the limiting grooves;

or the support limiting structure comprises a plurality of limiting locking holes (23) which are formed in the bottom wall of the axial sliding groove (24) and are sequentially arranged at intervals along the axial direction, and a limiting fixing piece (5) which is fixedly inserted into the hollow cavity of the support and can be selectively inserted into the limiting locking holes (23).

Technical Field

The invention relates to the technical field of medical instruments.

Background

Proximal femoral fractures are common in the elderly and are common osteoporotic fractures. For unstable proximal femoral fractures, intramedullary nails are generally adopted for reduction support treatment at present. The main nail inserted into the femoral shaft and the neck internal tension screw or the spiral blade inserted into the femoral neck slide relatively due to the mutual insertion, so that dynamic pressurization is formed on the fractured end, and the sliding pressurization is considered to be beneficial to fracture healing.

However, in recent years, there has been an increasing number of complications arising from the use of intramedullary nails. For example, in the dynamic compression of the fractured bone, the undesirable stresses caused by the eccentric motion of the intramedullary nail are evident in the case of osteoporosis, often resulting in the cutting of the cervical tension screw or helical blade and the loss of fracture reduction, especially in the case of severe osteoporosis, which requires a second revision surgery.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, the present invention provides a reduction support assembly for treating femoral fracture, which can maintain the reduction state of the femoral fracture, prevent the loss of reduction of the fracture, and better promote the healing of the fracture.

To achieve the above objects, the present invention provides a reduction support assembly for treating femoral fractures, comprising:

an intramedullary support extending in a first direction and including a first support proximal portion insertable into the femoral tuberosity and a first support distal portion insertable into the femoral shaft;

an internal femoral neck support extending in a second direction and comprising a proximal second support portion insertable into the femoral neck and a distal second support portion insertable into the femoral tuberosity;

an outer femoral neck support extending in a second direction and comprising an outer support distal portion and an outer support proximal portion;

the distal end part of the second support is inserted on the proximal end part of the first support, the distal end part of the outer support is used for penetrating through the peripheral wall of the femoral shaft to be inserted on the intramedullary support, and the proximal end part of the outer support is used for supporting on the outer side wall of the bottom of the femoral neck.

Optionally, the outer femoral neck support comprises an external thread formed on at least the outer peripheral wall of the distal end portion of the outer support, the peripheral wall of the intramedullary cavity support is provided with an outer support insertion hole, the inner peripheral wall of the outer support insertion hole is provided with an internal thread matched with the external thread, and the distal end portion of the outer support is spirally inserted in the outer support insertion hole.

Optionally, the outer peripheral wall of the proximal end portion of the outer support is formed as a smooth peripheral wall.

Optionally, the proximal end of the outer support for supporting on the bottom outer sidewall of the femoral neck is spaced from the femoral head 9 attached to the proximal end of the femoral neck by no more than half of the length of the femoral neck in the second direction.

Optionally, the reduction support assembly further comprises a support stop structure for at least limiting displacement of the femoral neck inner support relative to the intramedullary support in the second direction.

Optionally, the intramedullary canal support is provided with a support hollow cavity extending along a first direction, the second support distal end portion penetrates through the circumferential wall of the first support proximal end portion and penetrates through the support hollow cavity, the support limiting structure includes a plurality of circumferential limiting grooves formed in the circumferential wall of the second support distal end portion and a limiting fixing member fixedly inserted into the support hollow cavity, the circumferential limiting grooves are sequentially arranged at intervals along a second direction, and the inner end of the limiting fixing member is inserted into the circumferential limiting grooves and is in limiting abutment with the axial groove side wall of the circumferential limiting groove.

Optionally, the support limiting structure further includes a plurality of pivoting limiting grooves disposed on the bottom wall of the circumferential limiting groove and sequentially arranged at intervals along the circumferential direction, and the inner end of the limiting fixing member is inserted into the pivoting limiting groove and is in limiting abutment with the circumferential groove side wall of the pivoting limiting groove.

Optionally, the intramedullary canal support is provided with a support hollow cavity extending along a first direction, the second support distal end portion penetrates through the peripheral wall of the first support proximal end portion and penetrates through the support hollow cavity, the support limiting structure comprises a plurality of limiting locking holes formed in the peripheral wall of the second support distal end portion and a limiting fixing member fixedly inserted in the support hollow cavity, and the inner end of the limiting fixing member is inserted into the limiting locking holes.

Optionally, the intramedullary canal inner support member is provided with a support member hollow cavity extending along a first direction, the second support member distal end portion penetrates through the peripheral wall of the first support member proximal end portion and penetrates through the support member hollow cavity, an axial sliding groove extending along the axial direction is formed in the peripheral wall of the second support member distal end portion, and the axial sliding groove is arranged at an interval of the support member limiting structure;

the support part limiting structure comprises a plurality of limiting grooves formed in the outer peripheral wall of the distal end part of the second support part and a limiting fixing part fixedly inserted in the hollow cavity of the support part, and the inner end of the limiting fixing part is alternatively inserted into the limiting grooves or the axial sliding grooves;

or the support part limiting structure comprises a plurality of limiting locking holes formed in the peripheral wall of the distal end part of the second support part and a limiting fixing part fixedly inserted in the hollow cavity of the support part, and the inner end of the limiting fixing part is alternatively inserted into the limiting locking holes or the axial sliding grooves.

Optionally, the intramedullary canal inner support is provided with a support hollow cavity extending along a first direction, the second support distal end portion penetrates through the peripheral wall of the proximal end portion of the first support and penetrates through the support hollow cavity, and the peripheral wall of the second support distal end portion is formed with an axial sliding groove extending along the axial direction;

the supporting piece limiting structure comprises a plurality of limiting grooves and limiting fixing pieces, wherein the limiting grooves are formed in the bottom wall of the axial sliding groove and are sequentially arranged at intervals along the axial direction;

or the supporting part limiting structure comprises a plurality of limiting locking holes which are formed in the bottom wall of the axial sliding groove and are sequentially arranged at intervals along the axial direction, and a limiting fixing part which is fixedly inserted in the hollow cavity of the supporting part and can be selectively inserted into the limiting locking holes.

Through the technical scheme, when the reduction support assembly is used for treating femoral fracture, the fracture part at the proximal end of the femur can be reduced again through the intramedullary support and the femoral neck inner support, and then the fracture part is supported on the outer side wall of the bottom of the femoral neck through the femoral neck outer support, so that the reduction state of the fracture part is ensured to be stably kept, the loss of fracture reduction is prevented, and the healing of the fracture part is better promoted.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic illustration of the use of a reduction support assembly for treating femoral fractures in accordance with an embodiment of the present invention;

FIG. 2 is a perspective view of a spacing fixture in an alternative embodiment of the present invention;

FIG. 3 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having a circumferential spacing groove;

FIG. 4 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having a circumferential spacing groove and a pivot spacing groove;

FIG. 5 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having a circumferential spacing groove with an axial groove sidewall that is an angled groove sidewall;

FIG. 6 is an enlarged, fragmentary view of the support member of FIG. 5 within the femoral neck;

FIG. 7 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having a circumferential spacing groove and a pivot spacing groove and the axial groove sidewall of the circumferential spacing groove being an angled groove sidewall;

FIG. 8 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having a positive lock hole;

FIG. 9 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having a positive lock hole and the positive lock hole being a slanted hole;

FIG. 10 is an axial cut away view of the femoral neck internal support of FIG. 9;

FIG. 11 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having circumferential limit grooves and axial slide grooves circumferentially spaced from one another;

FIG. 12 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having a circumferential spacing groove and an axial sliding groove circumferentially spaced apart from each other and a pivot spacing groove in the circumferential spacing groove;

FIG. 13 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having positive locking holes and axial slots circumferentially spaced apart from one another;

FIG. 14 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having an axial slide slot and a stop slot disposed within the axial slide slot;

FIG. 15 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having an axial slide slot and a positive lock hole disposed in the axial slide slot;

FIG. 16 is a perspective view of a spacing fixture in an alternative embodiment of the invention, the spacing fixture including a locking screw and an inner screw that is not threaded out of the inner end of the locking screw;

FIG. 17 is a perspective view of a spacing fixture in an alternative embodiment of the invention, the spacing fixture including a locking screw and an inner screw that has been threaded out of the inner end of the locking screw;

FIG. 18 is a perspective view of a spacing fixture in an alternative embodiment of the invention having spacers padded on the inner ends of the fixture base;

FIG. 19 is a perspective view of a spacing fixture in an alternative embodiment of the invention, having no spacer at the inner end of the fixture base;

FIG. 20 is a perspective view of an alternative embodiment of the femoral neck inner support of the present invention having an axial slide slot and a position limit locking hole disposed within the axial slide slot, the position limit locking hole being a slanted hole;

figure 21 is an isometric cutaway view of the femoral neck inner support of figure 20.

Description of reference numerals:

1 intramedullary canal inner support member 2 femoral neck inner support member

3 distal locking screw 4 femoral neck external support

5 limiting fixing piece 6 femoral shaft

7 femoral tuberosity 8 femoral neck

9 femoral head 10 end cover

21 circumferential limiting groove and 22 pivoting limiting groove

23 limit locking hole 24 axial sliding groove

25 limiting structure mark 26 sliding structure mark

51 fastener base 52 fastener insertion part

511 pad

D1 first direction D2 second direction

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In embodiments of the invention, where the context requires otherwise, the use of directional terms such as "upper, lower, top and bottom" is generally intended in the orientation shown in the drawings or the positional relationship of the various components in a vertical, vertical or gravitational orientation.

The invention will be described in detail below with reference to exemplary embodiments and with reference to the accompanying drawings.

As shown in fig. 1 to 21, an exemplary embodiment of the present invention provides a reduction support assembly for treating femoral fractures, which includes an intramedullary support 1, an intramedullary neck support 2, and an external femoral neck support 4.

When reduction support is performed on a femoral fracture site (for example, a proximal femoral fracture site), the intramedullary support 1 is inserted into the bone marrow of the femoral shaft 6 from the femoral tuberosity portion 7 in the first direction D1, the proximal end portion of the first support of the intramedullary support 1 is inserted into the femoral tuberosity portion 7, and the distal end portion of the first support of the intramedullary support 1 is inserted into the femoral shaft 6.

And inserting the inner femoral neck support 2 from the femoral tuberosity 7 into the medulla of the femoral neck 8 in a second direction D2, with the second support proximal end of the inner femoral neck support 2 inserted into the femoral neck 8 and the second support distal end of the inner femoral neck support 2 inserted into the femoral tuberosity 7 and inserted over the first support proximal end, thereby interconnecting the intramedullary support 1 and the inner femoral neck support 2 to reduce the fracture site of the femur.

In addition, in order to stably maintain the reduction state of the femoral fracture site, the loss of reduction of the fracture site is prevented, and the healing of the fracture site is better promoted. The distal end part of the outer support piece of the outer femoral neck support piece 4 penetrates through the peripheral wall of the femoral shaft 6 to be inserted on the intramedullary support piece 1, namely, the outer femoral neck support piece 4 is connected with the intramedullary support piece 1, and the proximal end part of the outer support piece of the outer femoral neck support piece 4, which extends from the distal end part of the outer support piece and extends along the second direction D2, is supported on the outer bottom wall of the femoral neck 8, so as to provide stronger supporting force on the fracture part, thus offsetting the bad component force generated by the physiological pressure and maintaining the reduction state of the cervical shaft angle.

In one embodiment, the femoral neck outer support 4 comprises an external thread formed on at least the outer peripheral wall of the distal end portion of the outer support, the peripheral wall of the intramedullary support 1 is provided with an outer support insertion hole, the inner peripheral wall of the outer support insertion hole is provided with an internal thread matching with the external thread, and the distal end portion of the outer support is spirally inserted in the outer support insertion hole. In other words, the stable connection between the outer femoral neck support 4 and the intramedullary canal inner support 1 can be ensured by the mutual screw connection between the distal end part of the outer support and the insertion hole of the outer support. Of course, the insertion connection between the outer femoral neck support 4 and the intramedullary canal support 1 can be other connection modes such as snap insertion, so long as the outer femoral neck support 4 is stably connected with the intramedullary canal support 1.

Since the proximal end portion of the outer support member of the outer femoral neck support 4 is supported on the bottom outer sidewall of the femoral neck 8, in order to reduce surface wear of the femoral neck 8, further, the outer peripheral wall of the proximal end portion of the outer support member is formed into a smooth peripheral wall, thereby reducing the frictional strength between the proximal end portion of the outer support member and the outer bone surface of the femoral neck 8.

To further improve the support stability, in one embodiment, the proximal portion of the outer support for supporting on the bottom outer sidewall of the femoral neck 8 is spaced from the femoral head 9 connected to the proximal end of the femoral neck 8 by no more than half the length of the femoral neck 8 in the second direction D2. In other words, the proximal end of the outer support extends at least to a position over half the length of the femoral neck 8, and in this configuration, the fulcrum of the proximal end of the outer support on the femoral neck 8 is closer to the femoral head 9 connected to the proximal end of the femoral neck 8 than to the femoral tuberosity 7, so that a longer moment arm can be prevented due to an excessively long distance between the fulcrum and the femoral head 9, and the femoral part between the fulcrum and the femoral head 9 can be prevented from being broken.

In an embodiment, the reduction support assembly further comprises a support limiting structure at least for limiting the displacement of the inner femoral neck support 2 relative to the intramedullary support 1 in the second direction D2, or further, for limiting the pivoting of the inner femoral neck support 2, i.e. the complete locking of the inner femoral neck support 2. The displacement of the supporting piece 2 in the limiting femoral neck relative to the supporting piece 1 in the medullary cavity along the second direction D2 is to prevent the excessive sliding and pressurizing at the fracture part of the femur, so that the shortening of the femoral neck 8 after the fracture part is healed is avoided, and the hip abduction function of the human body after the fracture part is healed again is not influenced.

As shown in fig. 3, in one embodiment, the intramedullary support 1 is provided with a support hollow cavity extending in a first direction D1, and the second support distal portion extends through the circumferential wall of the proximal portion of the first support and through the support hollow cavity. The supporting member limiting structure comprises a plurality of circumferential limiting grooves 21 formed in the outer peripheral wall of the distal end portion of the second supporting member and limiting fixing members 5 fixedly inserted into the hollow cavities of the supporting members, the circumferential limiting grooves 21 are sequentially arranged at intervals along the second direction D2, and the inner ends of the limiting fixing members 5 are inserted into the circumferential limiting grooves 21 and are in limiting abutting connection with the axial groove side walls of the circumferential limiting grooves 21. Because the inner end of the limit fixing piece 5 is in limit abutment with the axial groove side wall of the circumferential limit groove 21, the displacement of the femoral neck internal support 2 relative to the intramedullary support 1 along the second direction D2 can be limited, thereby preventing the formation of excessive sliding pressurization at the femoral fracture part.

In addition, the reduction support assembly further comprises an end closure 10. After the limiting fixing part 5 is fixedly inserted into the hollow cavity of the supporting part, the end part sealing cover 10 is used for sealing the end part opening of the hollow cavity of the supporting part so as to prevent the limiting fixing part 5 from being separated from the hollow cavity of the supporting part, and therefore the reliability of the reset supporting component is guaranteed.

Further, as shown in fig. 4, the supporting member limiting structure may further include a plurality of pivoting limiting grooves 22 disposed on the bottom wall of the circumferential limiting groove 21 and sequentially arranged at intervals along the circumferential direction, and the inner end of the limiting fixing member 5 is inserted into the pivoting limiting groove 22 and is in limiting abutment with the circumferential groove sidewall of the pivoting limiting groove 22. In this configuration, the spacing fixture 5 further limits the pivotal movement of the support member 2 within the femoral neck, thereby completely restricting the movement of the support member 2 within the femoral neck relative to the intramedullary support 1. Of course, the pivot limiting groove 22 is not limited to the saw-tooth shape as shown in the drawings, but may be formed in other shapes capable of limiting the pivotal movement of the support member 2 in the femoral neck in cooperation with the limiting fixture 5.

Further, as shown in fig. 5 to 7, in order to facilitate the insertion of the limit fixture 5 and reduce the contact wear between the limit fixture 5 and the femoral neck inner support 2, the axial groove side wall of the circumferential limiting groove 21 may be provided as an inclined groove side wall extending in the first direction D1, and in this structure, the limit fixture 5 extends in the first direction D1 and can be inserted straight (inserted straight) in the circumferential limiting groove 21.

As shown in fig. 8, in one embodiment, the intramedullary support 1 is provided with a support hollow cavity extending in a first direction D1, and the second support distal portion extends through the peripheral wall of the proximal portion of the first support and through the support hollow cavity. The support limiting structure comprises a plurality of limiting locking holes 23 formed on the outer peripheral wall of the distal end part of the second support and a limiting fixing piece 5 fixedly inserted in the hollow cavity of the support, wherein the inner end of the limiting fixing piece 5 is inserted into the limiting locking holes 23, so that the displacement of the femoral neck inner support 2 relative to the intramedullary support 1 along the second direction D2 can be limited, and the pivoting motion of the femoral neck inner support 2 can be limited, thereby completely restricting the movement of the femoral neck inner support 2 relative to the intramedullary support 1 and preventing the excessive sliding pressure at the femoral fracture part.

Further, as shown in fig. 9 and 10, in order to facilitate the insertion of the limit fixture 5 and reduce the contact wear between the limit fixture 5 and the femoral neck inner support 2, the limit lock hole 23 may be provided as an inclined hole having a hole center axis extending in the first direction D1. With this structure, the limit fastener 5 extends in the first direction D1 and can be inserted straight (inserted straight) into the limit lock hole 23.

As shown in fig. 11 to 13, in an embodiment, the intramedullary canal support 1 is provided with a support hollow cavity extending along a first direction D1, a second support distal end portion penetrates through a peripheral wall of the proximal end portion of the first support and penetrates through the support hollow cavity, an axial sliding slot 24 extending along an axial direction is formed on a peripheral wall of the second support distal end portion, and the axial sliding slot 24 is spaced from the support limiting structure.

In one example according to this embodiment, as shown in fig. 11 and 12, the support member retaining structure includes a plurality of retaining grooves (e.g., the circumferential retaining groove 21 and the pivot retaining groove 22 in the above-described embodiment) formed in the outer peripheral wall of the distal end portion of the second support member, and a retaining fixture 5 fixedly inserted into the hollow cavity of the support member, and the inner end of the retaining fixture 5 is alternatively inserted into the retaining groove or the axial slide groove 24.

In other words, in the case where it is necessary to limit the displacement of the femoral neck inner support 2 relative to the intramedullary support 1 in the second direction D2, the inner end of the limit fixture 5 is inserted into the limit groove of the second support distal end portion when the reduction support assembly is installed.

In the case where the displacement of the internal support member 2 of the femoral neck relative to the intramedullary support 1 in the second direction D2 is not required, i.e., the sliding compression at the femoral fracture site is allowed, the inner end of the spacing fixture 5 can be inserted into the axial sliding groove 24, and the inner end of the spacing fixture 5 can slide relatively in the axial sliding groove 24.

In another example according to this embodiment, as shown in fig. 13, the support member position-limiting structure comprises a plurality of position-limiting locking holes 23 formed in the outer peripheral wall of the distal end portion of the second support member and a position-limiting fixing member 5 fixedly inserted in the hollow cavity of the support member, the inner end of the position-limiting fixing member 5 being alternatively inserted into the position-limiting locking holes 23 or the axial slide grooves 24.

In other words, in the case where it is necessary to limit the displacement of the femoral neck inner support 2 relative to the intramedullary support 1 in the second direction D2, the inner end of the limit fixture 5 is inserted into the limit-lock hole 23 when the reduction support assembly is installed.

In the case where the displacement of the internal support member 2 of the femoral neck relative to the intramedullary support 1 in the second direction D2 is not required, i.e., the sliding compression at the femoral fracture site is allowed, the inner end of the spacing fixture 5 can be inserted into the axial sliding groove 24, and the inner end of the spacing fixture 5 can slide relatively in the axial sliding groove 24.

In another embodiment, as shown in fig. 14, 15 and 20, different mounting options may be selected when mounting the reduction support assembly based on whether it is desired to limit the displacement of the support member 2 within the femoral neck relative to the intramedullary support 1 in the second direction D2. In the present embodiment, the intramedullary support 1 is provided with a support hollow cavity extending in the first direction D1, the second support distal end portion penetrates through the peripheral wall of the proximal end portion of the first support and passes through the support hollow cavity, and the peripheral wall of the second support distal end portion is formed with an axial slide groove 24 extending in the axial direction.

In an example according to the present embodiment, as shown in fig. 14 and 16 to 19, the support limiting structure includes a plurality of limiting grooves formed on the bottom wall of the axial sliding groove 24 and arranged at intervals in the axial direction, and a limiting fixing member 5 fixedly inserted into the hollow cavity of the support and selectively inserted into the limiting grooves.

In other words, in the case where it is necessary to limit the displacement of the femoral neck inner support 2 relative to the intramedullary support 1 in the second direction D2, the inner end of the limit fixing member 5 is inserted into the limit groove located at the groove bottom wall of the axial sliding groove 24 when the reduction support assembly is installed.

In the case where it is not necessary to limit the displacement of the femoral neck inner support 2 relative to the intramedullary support 1 in the second direction D2, that is, to allow the sliding compression at the femoral fracture site, it is not necessary to insert the inner end of the limit fixing member 5 into the limit groove of the groove bottom wall of the axial sliding groove 24, or to insert only the inner end of the limit fixing member 5 into the axial sliding groove 24, but not to the depth at which the limit groove is provided.

In another example according to the present embodiment, as shown in fig. 15 and 16 to 19, the support limiting structure includes a plurality of limiting locking holes 23 formed on the bottom wall of the axial sliding slot 24 and arranged at intervals in the axial direction, and a limiting fixing member 5 fixedly inserted into the hollow cavity of the support and selectively inserted into the limiting locking holes 23.

In other words, in the case where it is necessary to limit the displacement of the femoral neck inner support 2 relative to the intramedullary support 1 in the second direction D2, the inner end of the limit fixing member 5 is inserted into the limit locking hole 23 at the bottom wall of the axial slide groove 24 at the time of mounting the reduction support assembly.

In the case where the displacement of the internal support member 2 in the second direction D2 with respect to the intramedullary support member 1 is not required, that is, the sliding compression is allowed to be formed at the femoral fracture site, it is not necessary to insert the inner end of the spacing fixture 5 into the spacing locking hole 23 of the groove bottom wall of the axial sliding groove 24, or to insert only the inner end of the spacing fixture 5 into the axial sliding groove 24, but not to the depth at which the spacing locking hole 23 is provided.

Further, as shown in fig. 16 to 19, the spacing fixture 5 includes a fixture base 51 and a fixture insertion part 52 connected to the fixture base 51, the fixture insertion part 52 being configured to be inserted into the spacing groove or the spacing locking hole 23 located at the groove bottom wall of the axial sliding groove 24. Wherein at least one of the fixture base 51 and the fixture plug 52 is formed as a telescopic part capable of telescopic movement in the radial direction of the femoral neck inner support 2. That is, the fixture base 51 or the fixture insertion part 52 may be formed as a telescopic part capable of telescopic movement in the radial direction of the femoral neck inner support 2, or both the fixture base 51 and the fixture insertion part 52 may be formed as a telescopic part capable of telescopic movement in the radial direction of the femoral neck inner support 2.

In one example, referring to fig. 16 and 17, the fixture base 51 includes a locking screw and the fixture plug 52 includes an internal screw. Wherein, a thread fixed connection is formed between the outer peripheral wall of the locking screw and the inner peripheral wall of the cavity in the support of the intramedullary canal support 1, and the inner screw thread is inserted in the locking screw and can move along the first direction D1 by screwing, namely along the radial telescopic movement of the femoral neck inner support 2.

In the case that it is required to limit the displacement of the inner support member 2 in the second direction D2 relative to the intramedullary support member 1, when the reduction support assembly is installed, the inner end of the inner screw can be inserted into the limit groove or the limit locking hole 23 located on the bottom wall of the axial sliding groove 24 by only moving the inner screw inwards along the radial direction of the inner support member 2.

In the case where it is not necessary to limit the displacement of the inner support member 2 in the second direction D2 with respect to the intramedullary support 1, that is, to allow the formation of sliding compression at the femoral fracture site, it is not necessary to move the inner screw inward in the radial direction of the inner support member 2, so that the inner screw is not inserted into the limit groove or the limit lock hole 23 at the groove bottom wall of the axial slide groove 24, and thus, the sliding limit of the inner support member 2 is not formed.

In another example, referring to fig. 18 and 19, the fixture base 51 includes a locking screw and washer 511, and the fixture plug 52 includes an inner screw. Wherein, the outer peripheral wall of the locking screw and the inner peripheral wall of the cavity in the supporting piece hollow cavity of the intramedullary canal inner supporting piece 1 form a thread fixed connection, the inner screw extends out from the inner end of the locking screw, the gasket 511 is provided with a through hole, and the inner screw can penetrate through the through hole to be arranged at the inner end of the locking screw.

In case of limiting the displacement of the femoral neck inner support 2 relative to the intramedullary support 1 along the second direction D2, the washer 511 is not required to be arranged at the inner end of the locking screw during the installation of the reduction support assembly, thereby ensuring that the inner screw can be inserted into the limiting groove or the limiting locking hole 23 of the bottom wall of the axial sliding groove 24.

Under the condition that the inner support 2 of the femoral neck is not required to limit the displacement of the inner support 2 along the second direction D2 relative to the intramedullary support 1, namely, under the condition that the sliding pressurization is allowed to be formed at the femoral fracture part, the gasket 511 is padded at the inner end of the locking screw, so that the inner end of the inner screw is erected outside the limiting groove or the limiting locking hole 23 of the groove bottom wall of the axial sliding groove 24, namely, the inner screw is not inserted into the limiting groove or the limiting locking hole 23 of the groove bottom wall of the axial sliding groove 24, and the sliding limit of the inner support 2 of the femoral neck is not formed.

Further, as shown in fig. 20 and 21, in order to facilitate the insertion of the limit fastener 5 and reduce the contact wear between the limit fastener 5 and the femoral neck support member 2, the limit lock hole 23 located at the bottom wall of the groove of the axial slide groove 24 may be provided as an inclined hole having a hole center axis extending in the first direction D1. With this structure, the limit fastener 5 extends in the first direction D1 and can be inserted straight (inserted straight) into the limit lock hole 23.

Since the limiting groove, the limiting hole or the axial sliding groove 21 on the femoral neck internal support 2 are invisible after the femoral neck internal support 2 is inserted into the femoral neck 8 from the femoral tuberosity part 7 along the second direction D2, in order to ensure that the medical staff can insert the limiting fixing part 5 into the limiting groove, the limiting hole or the axial sliding groove 24 quickly and accurately, the installation mark convenient for identification needs to be arranged on the far end of the second support extending out of the bone.

For example, referring to fig. 8, 9, 14, 15 and 20, the distal end of the second support member is provided with a limit structure mark 25, and during the process of inserting the femoral neck inner support member 2 from the femoral tuberosity 7 to the femoral neck 8 along the second direction D2, the specific position of the limit structure such as a limit groove or a limit hole can be known by observing the limit structure mark 25, so that the medical staff can quickly and accurately insert the limit fixing member 5 into the limit structure such as the limit groove or the limit hole by rotationally adjusting the femoral neck inner support member 2.

With continued reference to fig. 11-13, when the femoral neck support member 2 is provided with axial slide slots 24 spaced from the support stop structure, glide structure indicia 26 corresponding to the axial slide slots 21 can be provided on the distal end of the second support member. In the process of inserting the femoral neck internal support 2 into the femoral neck 8 from the femoral tuberosity 7 along the second direction D2, the specific position of the limit structure such as the limit groove or the limit hole can be known by observing the limit structure mark 25, and the specific position of the axial sliding groove 21 can also be known by observing the sliding structure mark 26. Therefore, the medical staff can insert the limit fixing part 5 into the limit structure or the axial sliding groove 24 alternatively quickly and accurately by rotating and adjusting the femoral neck inner support part 2.

It should be noted that the limiting structure marks 25 and the sliding structure marks 26 are not limited to be configured in the structures and shapes as shown in the figures, as long as the medical staff can visually observe the specific positions of the limiting structures such as the limiting grooves or the limiting holes and the sliding structures such as the axial sliding grooves 21.

In addition, the reduction support assembly in the exemplary embodiment of the present invention may further include a distal locking screw 3, the distal locking screw 3 penetrates through the peripheral wall of the femoral shaft 6 and is inserted on the distal end of the first support member, so as to make the support structure more stable and reliable.

It should be noted that the above intramedullary support 1, the femoral neck support 2 and the distal locking screw 3 may be in the shape of an intramedullary nail, or may be in other shapes, and are not limited herein as long as the function of the reduction support assembly can be achieved.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that, in the foregoing embodiments, various features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in further detail in the embodiments of the present invention.

In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.