CN109938815B

CN109938815B - Femoral head extraction device

Info

Publication number: CN109938815B
Application number: CN201910281122.5A
Authority: CN
Inventors: 田华; 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2023-10-27
Anticipated expiration: 2039-04-09
Also published as: CN109938815A

Abstract

The application provides femoral head extraction equipment. The femoral head extraction device includes: a clamping assembly having a clamping space for clamping the femoral head, the clamping space being adjustably sized; the ejection structure is movably arranged in the clamping space in a penetrating way and is provided with a puncture part which can penetrate into the femoral head; the adjusting structure is arranged on the clamping assembly, and after at least part of the puncture part penetrates into the femoral head, the size of the clamping space is adjusted through the adjusting structure, so that the clamping assembly clamps the femoral head, and the femoral head is taken out from the acetabular fossa. The application effectively solves the problems of lower extraction rate and difficult achievement of expected effect of femoral head extraction equipment in the prior art.

Description

Femoral head extraction device

Technical Field

The application relates to an orthopedic medical instrument, in particular to femoral head extraction equipment.

Background

At present, in the orthopedic hip joint replacement operation, the osteotomy femoral head is in an acetabular fossa, the surface of the femoral head is smooth and difficult to hold, and the osteotomy femoral head needs to be taken out by using a femoral head extractor. In the prior art, femoral head extractors with an auger are commonly used, with the cone angle of the auger being small in order to facilitate insertion of the auger into the femoral head. However, in the process of taking out the femoral head, if the cone angle is too small, the adhesion force of the spiral cone drill is small, which is not beneficial to taking out the femoral head; if the cone angle is too large, the spiral cone drill is inconvenient to insert into the femoral head, so that the removal of the femoral head is affected, and the expected effect is difficult to achieve.

Disclosure of Invention

The application mainly aims to provide femoral head extraction equipment, which solves the problems that the extraction rate of the femoral head extraction equipment in the prior art is low and the expected effect is difficult to achieve.

In order to achieve the above object, the present application provides a femoral head extraction device comprising: a clamping assembly having a clamping space for clamping the femoral head, the clamping space being adjustably sized; the ejection structure is movably arranged in the clamping space in a penetrating way and is provided with a puncture part which can penetrate into the femoral head; the adjusting structure is arranged on the clamping assembly, and after at least part of the puncture part penetrates into the femoral head, the size of the clamping space is adjusted through the adjusting structure, so that the clamping assembly clamps the femoral head, and the femoral head is taken out from the acetabular fossa.

Further, the adjustment structure includes a sleeve portion, and the clamping assembly includes: a pivoting portion; the clamping members are arranged around the pivoting part to form a clamping space, each clamping member is pivotally connected with the pivoting part, the sleeving part is sleeved on the clamping members, and the sleeving positions of the sleeving parts on the clamping members are adjusted to adjust the size of the clamping space.

Further, the sleeving part is positioned above the pivoting part.

Further, the ejection structure is a rod-shaped structure, a part of the rod-shaped structure is provided with a threaded section, and the adjusting structure further comprises: the adjusting part is provided with an internal threaded hole, the rod-shaped structure penetrates through the pivoting part and is arranged in the adjusting part in a penetrating mode, so that the threaded section is in threaded connection with the internal threaded hole, the adjusting part is further provided with a mounting concave part, the part of the sleeving part stretches into the mounting concave part, and the adjusting part is rotated to enable the adjusting part to drive the sleeving part to move towards or away from the pivoting part along the extending direction of the rod-shaped structure so as to adjust the size of the clamping space.

Further, the mounting recess is an annular groove or an arc groove.

Further, the adjusting portion has a cylindrical structure, and a central axis of the cylindrical structure is coaxially arranged with a central axis of the rod-like structure.

Further, the outer surface of the adjusting part is provided with anti-skid patterns.

Further, the sleeving part is provided with a plurality of through holes, the through holes are arranged in one-to-one correspondence with the clamping pieces, and each clamping piece penetrates through the corresponding through hole.

Further, each clip includes: the clamping part is provided with a tooth-shaped structure on the surface facing the femoral head; the connecting part is connected with the clamping part, the sleeving part is sleeved on the connecting part, the connecting part is of a first arc-shaped plate structure, and the arc center of the first arc-shaped plate structure is positioned at one side of the first arc-shaped plate, which is far away from the ejection structure.

Further, the clamping part is a second arc-shaped plate-shaped structure, and the arc center of the second arc-shaped plate-shaped structure is positioned at one side of the second arc-shaped plate-shaped structure facing the ejection structure.

Further, the ejection structure is a rod-shaped structure, and the distance between each clamping piece and the rod-shaped structure is consistent in a reference plane which is mutually perpendicular to the extending direction of the rod-shaped structure.

By applying the technical scheme of the application, the femoral head extraction equipment comprises a clamping assembly, an ejection structure and an adjustment structure. The clamping assembly is provided with a clamping space for clamping the femoral head, and the size of the clamping space is adjustable. The ejection structure is movably arranged in the clamping space in a penetrating way, and is provided with a penetrating part which can penetrate into the femoral head. The adjusting structure is arranged on the clamping assembly, and at least part of the puncture part penetrates into the femoral head so as to adjust the size of the clamping space through the adjusting structure, so that the clamping assembly clamps the femoral head, and the femoral head is taken out from the acetabular fossa. Thus, in the process of using the femoral head taking-out device by a worker, the ejection structure is operated so that the puncture part of the ejection structure penetrates into the femoral head to prevent the femoral head from moving relative to the ejection structure. After that, staff operates the adjustment structure to adjust the centre gripping space of clamping assembly through the adjustment structure, so that clamping assembly can be with the femoral head centre gripping, so that the staff takes out the femoral head from the acetabulum nest through clamping assembly, and then make the staff take out to the femoral head easier, simple and convenient, solved the lower problem of taking out rate of femoral head take out equipment among the prior art, be difficult to reach the expected effect.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of a femoral head extraction device according to the application when clamping a femoral head;

fig. 2 shows a front view of the femoral head extraction device of fig. 1 gripping a femoral head;

fig. 3 shows a schematic perspective view of an adjustment structure of the femoral head extraction device of fig. 1;

FIG. 4 shows a top view of the adjustment structure of FIG. 3;

FIG. 5 shows a front view of the adjustment structure of FIG. 3;

FIG. 6 shows a cross-sectional view of the adjustment structure of FIG. 5 in the A-A direction;

fig. 7 shows a schematic perspective view of a clamping assembly of the femoral head extraction device of fig. 1;

FIG. 8 shows a front view of the clamping assembly of FIG. 7;

FIG. 9 shows a top view of the clamping assembly of FIG. 7;

FIG. 10 shows a schematic perspective view of a clamp of the clamp assembly of FIG. 7;

FIG. 11 is a schematic perspective view of the pivot portion of the clamp assembly of FIG. 7 shown assembled with a fastener;

FIG. 12 shows a top view of the pivot of FIG. 11 assembled with a fastener; and

fig. 13 shows a front view of an ejection structure of the femoral head extraction device of fig. 1.

Wherein the above figures include the following reference numerals:

10. a clamping assembly; 11. a clamping space; 12. a pivoting portion; 121. a connection recess; 122. a through hole; 13. a clamping member; 131. a clamping part; 132. a tooth-like structure; 133. a connection part; 133a, a protrusion; 20. femoral head; 30. an ejection structure; 31. a puncture part; 32. a threaded section; 40. adjusting the structure; 41. a sleeving part; 411. a via hole; 42. an adjusting part; 421. an internal threaded hole; 422. a mounting recess; 50. a fastener.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present application.

The application provides femoral head extraction equipment in order to solve the problem that the extraction rate of the femoral head extraction equipment in the prior art is low and the expected effect is difficult to achieve.

As shown in fig. 1 and 2, the femoral head extraction device includes a clamping assembly 10, an ejection structure 30, and an adjustment structure 40. Wherein the clamping assembly 10 has a clamping space 11 for clamping the femoral head 20, the clamping space 11 being adjustably dimensioned. The ejection structure 30 is movably inserted into the clamping space 11, and the ejection structure 30 has a piercing portion 31 that can penetrate into the femoral head 20. The adjusting structure 40 is disposed on the clamping assembly 10, and after at least a portion of the penetrating portion 31 penetrates into the femoral head 20, the size of the clamping space 11 is adjusted by the adjusting structure 40, so that the clamping assembly 10 clamps the femoral head 20, and the femoral head 20 is removed from the acetabular fossa.

By applying the technical scheme of the embodiment, in the process that a worker uses the femoral head taking-out device, the ejection structure 30 is operated, so that the puncture part 31 of the ejection structure 30 penetrates into the femoral head 20, and the femoral head 20 is prevented from moving relative to the ejection structure 30. Afterwards, the staff operates the adjusting structure 40 to adjust the clamping space of the clamping assembly 10 through the adjusting structure 40, so that the clamping assembly 10 can clamp the femoral head 20, so that the staff can take out the femoral head 20 from the acetabular fossa through the clamping assembly 10, and further, the staff can take out the femoral head 20 more easily and simply, and the problem that the taking-out rate of the femoral head taking-out device in the prior art is lower and the expected effect is difficult to achieve is solved.

In this embodiment, the clamp assembly 10 embraces the femoral head 20 in a hugging manner.

As shown in fig. 3 to 9, the adjustment structure 40 includes a sleeve portion 41, and the clamp assembly 10 includes a pivot portion 12 and three clamps 13. Wherein, three clamping pieces 13 are arranged around the pivoting portion 12 to form a clamping space 11, and each clamping piece 13 is pivotally connected with the pivoting portion 12, and the sleeving portion 41 is sleeved on the three clamping pieces 13 to adjust the sleeving position of the sleeving portion 41 on each clamping piece 13 so as to adjust the size of the clamping space 11. In this way, the worker can adjust the size of the clamping space 11 by adjusting the sleeving position of the sleeving part 41 on each clamping piece 13, so that the worker can clamp the femoral head 20 more easily and simply, and the labor intensity of the worker is reduced.

Specifically, each clamping piece 13 can rotate around the pivoting position of the pivoting part 12, so that the position of two ends of the clamping piece 13 is changed, and the size adjustment of the clamping space 11 formed by the three clamping pieces 13 is realized. After the worker penetrates the puncture part 31 of the ejector structure 30 into the femoral head 20, the position of the sleeve part 41 on each clamping member 13 is adjusted, and the size of the clamping space 11 is further adjusted, so that the three clamping members 13 can clamp the femoral head 20. After the three clamping members 13 clamp the femoral head 20, the femoral head extraction device is pulled or pulled in a direction away from the acetabular fossa to extract the femoral head 20 from the acetabular fossa.

The number of the holders 13 is not limited to this. Alternatively, the clamping members 13 are four or five or six. Thus, the clamping assembly 10 can clamp the femoral head 20 more stably, and the extraction rate of the femoral head extraction device is improved.

As shown in fig. 1 and 2, the fitting portion 41 is located above the pivot portion 12. Thus, the sleeving part 41 is sleeved on each clamping piece 13, and the sleeving part 41 moves along the extending direction of each clamping piece 13 so as to adjust the size of the clamping space 11, so that the clamping assembly 10 can clamp the femoral heads 20 with different sizes, and the application range of the femoral head taking-out equipment is enlarged. Specifically, when the femoral head 20 needs to be clamped, the worker operates the sleeve portion 41 to move toward the pivot portion 12, the clamping space 11 gradually decreases, and the clamping assembly 10 can clamp the femoral head 20. When the femoral head 20 is removed from the acetabular fossa and released, the operator manipulates the sleeve 41 to move away from the pivot 12 to progressively increase the clamping space 11 to effect release of the clamping assembly 10 to the femoral head 20.

The positions of the fitting portion 41 and the pivot portion 12 are not limited to this. Alternatively, the nesting portion 41 is located below the pivoting portion 12.

As shown in fig. 3, 4, 6 and 13, the ejection structure 30 is a rod-like structure, a part of which has a threaded section 32, and the adjustment structure 40 further includes an adjustment portion 42. The adjusting portion 42 has an internal threaded hole 421, the rod-shaped structure passes through the pivot portion 12 and is inserted into the adjusting portion 42, so that the threaded section 32 is in threaded connection with the internal threaded hole 421, the adjusting portion 42 further has a mounting recess 422, and a portion of the sleeving portion 41 extends into the mounting recess 422, so that the adjusting portion 42 drives the sleeving portion 41 to move toward or away from the pivot portion 12 along the extending direction of the rod-shaped structure by rotating the adjusting portion 42, so as to adjust the size of the clamping space 11. Thus, the above arrangement makes the position adjustment of the sleeve portion 41 by the worker easier and simpler, and reduces the labor intensity of the worker. Meanwhile, the femoral head taking-out equipment is simple in structure and easy to process and realize.

Specifically, after the puncture part 31 of the ejection structure 30 penetrates into the femoral head 20, the operator rotates the adjustment part 42 along the preset direction, so that the adjustment part 42 moves towards the pivot part 12 along the ejection structure 30, and the sleeving part 41 moves towards the pivot part 12 under the driving of the adjustment part 42, so that the clamping space 11 is gradually reduced, and the clamping assembly 10 clamps the femoral head 20, so that the femoral head 20 is taken out from the acetabular fossa; when the femoral head 20 is taken out from the acetabular fossa and released, the operator rotates the adjusting portion 42 in a direction opposite to the preset direction, so that the adjusting portion 42 moves along the ejection structure 30 in a direction away from the pivoting portion 12, and the sleeving portion 41 moves in a direction away from the pivoting portion 12 under the driving of the adjusting portion 42, so that the clamping space 11 is gradually increased, and the release of the clamping assembly 10 to the femoral head 20 is realized.

In this embodiment, the mounting recess 422 is an annular groove, the sleeving part 41 is in a disc structure, and a preset gap is formed between the sleeving part 41 and the annular groove, so that when the adjusting part 42 performs rotational movement, the sleeving part 41 slides along each clamping piece 13, normal use of the sleeving part 41 is ensured, and further, the operation reliability of the femoral head extraction device is improved. Meanwhile, the structure is simple, easy to process and realize, and labor intensity of workers is reduced.

The structure of the mounting recess 422 is not limited to this. Alternatively, the mounting recess 422 is an arcuate slot. The structure is simple in structure, easy to process and realize, and labor intensity of workers is reduced.

In the present embodiment, the adjustment portion 42 has a cylindrical structure, and the central axis of the cylindrical structure is disposed coaxially with the central axis of the rod-like structure. Thus, the above arrangement makes the movement of the adjustment portion 42 along the rod-shaped structure smoother, and does not vibrate, thereby improving the running stability of the femoral head extraction device and improving the use experience of staff.

In this embodiment, the outer surface of the adjustment portion 42 has anti-skid grains. Thus, when the operator rotates the adjustment part 42, the anti-slip lines can increase the friction between the operator's hand and the adjustment part 42, and the anti-slip effect is achieved, so that the operator can operate the adjustment part 42 more easily and simply.

Alternatively, the housing portion 41 has a plurality of through holes 411, and the plurality of through holes 411 are disposed in one-to-one correspondence with the plurality of clips 13, and each clip 13 passes through the corresponding through hole 411. As shown in fig. 3 and 4, the housing portion 41 has three through holes 411, the three through holes 411 being provided in one-to-one correspondence with the three clips 13, each clip 13 passing through the through hole 411 corresponding thereto. Specifically, each via 411 is an inclined hole, so as to ensure that the sleeving part 41 can adjust the distance between the three clamping members 13, and further adjust the size of the clamping space 11.

As shown in fig. 10, each clip 13 includes a clip portion 131 and a connecting portion 133. Wherein the surface of the clamping part 131 facing the femoral head 20 is provided with a tooth-like structure 132. The connecting portion 133 is connected with the clamping portion 131, the sleeving portion 41 is sleeved on the connecting portion 133, the connecting portion 133 is of a first arc-shaped plate-shaped structure, and an arc center of the first arc-shaped plate-shaped structure is located on one side, away from the ejection structure 30, of the first arc-shaped plate. Thus, the clamping part 131 can better clamp and clamp the femoral head 20 by the above arrangement of the clamping piece 13, and further the clamping effect of the clamping assembly 10 is improved. Meanwhile, the structure is simple, easy to process and realize, and the processing cost of the femoral head taking-out equipment is reduced.

As shown in fig. 10, the clamping portion 131 is a second arc-shaped plate-shaped structure, and an arc center of the second arc-shaped plate-shaped structure is located at a side of the second arc-shaped plate-shaped structure facing the ejection structure 30. Specifically, the surface of the second arc-shaped plate-shaped structure facing the ejection structure 30 is provided with the tooth-shaped structure 132, which can increase the contact area between the clamping portion 131 and the femoral head 20, so as to increase the clamping force of the clamping assembly 10 on the femoral head 20.

As shown in fig. 1, the connecting portion 133 has a protruding portion 133a, and the pivoting portion 12 has three connecting recesses 121, and each protruding portion 133a extends into one of the connecting recesses 121, and the fastener 50 passes through the connecting recess 121 and the protruding portion 133a to pivotally connect the protruding portion 133a to the pivoting portion 12. Wherein the pivot portion 12 has a through hole 122 through which the ejection structure 30 passes, and three connection recesses 121 are provided at intervals around the circumference of the through hole 122.

As shown in fig. 10 to 12, the distance between each clip 13 and the rod-like structure coincides in a reference plane perpendicular to the extending direction of the rod-like structure. Like this, the above-mentioned setting makes each clamping piece 13 to the clamping force size unanimity of femoral head 20, and then makes the clamping force that femoral head 20 received more even, avoids taking place clamping assembly 10 and causes the phenomenon of clamping damage to femoral head 20.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

in the process of using the femoral head taking-out equipment by a worker, the ejection structure is operated so that the puncture part of the ejection structure penetrates into the femoral head to prevent the femoral head from moving relative to the ejection structure. After that, staff operates the adjustment structure to adjust the centre gripping space of clamping assembly through the adjustment structure, so that clamping assembly can be with the femoral head centre gripping, so that the staff takes out the femoral head from the acetabulum nest through clamping assembly, and then make the staff take out to the femoral head easier, simple and convenient, solved the lower problem of taking out rate of femoral head take out equipment among the prior art, be difficult to reach the expected effect.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A femoral head extraction device comprising:

a clamping assembly (10) having a clamping space (11) for clamping a femoral head (20), the clamping space (11) being adjustably sized;

an ejection structure (30) movably penetrating the clamping space (11), wherein the ejection structure (30) is provided with a puncture part (31) which can penetrate into the femoral head (20);

an adjusting structure (40) arranged on the clamping assembly (10), wherein at least part of the puncture part (31) penetrates into the femoral head (20) so as to adjust the size of the clamping space (11) through the adjusting structure (40) to enable the clamping assembly (10) to clamp the femoral head (20) and further take out the femoral head (20) from the acetabular fossa;

the adjustment structure (40) comprises a sleeve portion (41), and the clamping assembly (10) comprises:

a pivoting part (12);

a plurality of clamping pieces (13), wherein the clamping pieces (13) are arranged around the pivoting part (12) to form the clamping space (11), each clamping piece (13) is pivotally connected with the pivoting part (12), the sleeving part (41) is sleeved on the clamping pieces (13) to adjust the size of the clamping space (11) by adjusting the sleeving position of the sleeving part (41) on each clamping piece (13);

the sleeving part (41) is provided with a plurality of through holes (411), the plurality of through holes (411) are arranged in one-to-one correspondence with the plurality of clamping pieces (13), each clamping piece (13) passes through the corresponding through hole (411), and each through hole (411) is an inclined hole;

the adjusting structure (40) further comprises an adjusting part (42), the ejection structure (30) is a rod-shaped structure, the rod-shaped structure penetrates through the pivoting part (12) and penetrates through the adjusting part (42), and the size of the clamping space (11) is adjusted by rotating the adjusting part (42) so that the adjusting part (42) drives the sleeving part (41) to move towards or away from the pivoting part (12) along the extending direction of the rod-shaped structure.

2. The femoral head extraction device according to claim 1, wherein the nesting portion (41) is located above the pivoting portion (12).

3. The femoral head extraction device according to claim 1, wherein part of the rod-like structure has a threaded section (32), the adjustment portion (42) has an internally threaded bore (421), the threaded section (32) is threadedly connected to the internally threaded bore (421), the adjustment portion (42) further has a mounting recess (422), and part of the sleeve portion (41) extends into the mounting recess (422).

4. The femoral head extraction device of claim 3, wherein the mounting recess (422) is an annular groove or an arcuate groove.

5. The femoral head extraction device according to claim 3, wherein the adjustment portion (42) is a cylindrical structure having a central axis disposed coaxially with a central axis of the rod-like structure.

6. The femoral head extraction device of claim 3, wherein an outer surface of the adjustment portion (42) has anti-slip features.

7. The femoral head extraction device according to claim 1, wherein each of the clamping members (13) comprises:

a clamping part (131), wherein a tooth-shaped structure (132) is arranged on the surface of the clamping part (131) facing the femoral head (20);

the connecting part (133) is connected with the clamping part (131), the sleeving part (41) is sleeved on the connecting part (133), the connecting part (133) is of a first arc-shaped plate structure, and the arc center of the first arc-shaped plate structure is positioned at one side, away from the ejection structure (30), of the first arc-shaped plate.

8. The femoral head extraction device according to claim 7, wherein the clamping portion (131) is a second arcuate plate-like structure having an arc center located on a side of the second arcuate plate-like structure facing the ejection structure (30).

9. The femoral head extraction device according to claim 1, wherein the ejection structure (30) is a rod-like structure, the distance between each of the clamping members (13) and the rod-like structure being uniform in a reference plane mutually perpendicular to the direction of extension of the rod-like structure.