CN219439572U - Device for separating a ball head from a femoral stem - Google Patents
Device for separating a ball head from a femoral stem Download PDFInfo
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- CN219439572U CN219439572U CN202222975145.6U CN202222975145U CN219439572U CN 219439572 U CN219439572 U CN 219439572U CN 202222975145 U CN202222975145 U CN 202222975145U CN 219439572 U CN219439572 U CN 219439572U
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- ball head
- femoral stem
- separating
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Abstract
The utility model relates to the field of auxiliary tools for prosthesis replacement surgery, in particular to a device for separating a ball head from a femoral stem. The device comprises a handle, a locking piece and an adjusting piece, wherein the handle is provided with a clamping section, a fulcrum section and an adjusting section; the clamping section is provided with a clamping groove matched with the ball head so as to clamp the ball head; the handles are arranged in two and are rotatably connected through pins, and the pins are arranged on the fulcrum section; the length of the adjustment section is at least twice the length of the clamping section; the adjusting piece is provided with external threads, the locking piece is provided with a threaded hole matched with the external threads, and the locking piece is inserted into the adjusting piece; one of the handles is provided with a mounting hole, and the adjusting piece is inserted into the mounting hole and hinged to the other handle, so that when the locking piece is screwed, the distance between the two handles can be adjusted. Therefore, the problem that the ball head and the femoral stem are not easy to separate in the prior art is solved.
Description
Technical Field
The utility model belongs to the technical field of medical appliances, and relates to a device for separating a ball head from a femoral stem.
Background
The total hip revision surgery is a surgery requiring joint replacement again after failure of the primary total hip replacement surgery, such as fracture of a prosthesis, possible fracture of a ceramic ball or aseptic infection and loosening after primary replacement.
In some cases, such as chipping of the ball head, only the ball head replacement is needed, and then the repair is performed using the repair ceramic head. Before replacing a new ball head, the ball head assembled by primary implantation needs to be taken out, and the normal manual removal difficulty is high due to the taper press fit locking of the ceramic ball head and the femoral stem, so that a device for separating the ball head from the femoral stem is needed for separating the ceramic ball head from the femoral stem.
At present, no ball head separating instrument is available in the market, so that the ceramic ball head and the femoral stem are not easy to separate, the operation is influenced, and the operation time is wasted.
It follows that it is necessary to resort to related medical instruments to improve the situation in which the ceramic ball head and the femoral stem are not easily separated. How to manufacture a device for separating the ball head from the femoral stem, so that the structural design is reasonable, and the problem of separating the ceramic ball head from the femoral stem is solved, which is one of the important research subjects in the field at present.
Disclosure of Invention
The utility model aims to provide a device for separating a ball head from a femoral stem, which is used for solving the problem that the ball head is not easy to separate from the femoral stem in the prior art.
In order to achieve the above object, the present utility model provides a device for separating a ball head from a femoral stem, comprising a handle, a locking member and an adjusting member, the handle having a clamping section, a fulcrum section and an adjusting section; the clamping section is provided with a clamping groove matched with the ball head so as to clamp the ball head; the handles are arranged in two and are rotatably connected through pins, and the pins are arranged on the fulcrum section; the length of the adjustment section is at least twice the length of the clamping section;
the adjusting piece is provided with external threads, the locking piece is provided with a threaded hole matched with the external threads, and the locking piece is inserted into the adjusting piece;
one of the handles is provided with a mounting hole, and the adjusting piece is inserted into the mounting hole and hinged to the other handle, so that when the locking piece is screwed, the distance between the two handles can be adjusted.
In one possible embodiment, the locking element is provided as a rotary disk, the outer circumferential surface of which is provided with an anti-slip projection.
In one possible design, a stop seat is further arranged between the turntable and the handle, and the diameter of the stop seat is larger than that of the threaded hole;
the stop seat is provided with an inner hole matched with the threaded hole; and the stop seat is fixedly connected to the turntable.
In one possible design, the device for separating the ball head from the femoral stem further comprises a push rod, wherein a stud is arranged on the push rod; the clamping section of one handle is provided with a screw hole matched with the stud, and the propping rod is in threaded connection with the screw hole so as to prop against the other handle when the propping rod is screwed.
In one possible design, the end face of the push rod pointing toward the handle is configured as a sphere.
In one possible design, the grip sections of the two handles are inclined towards the outside to form a cocking.
In one possible design, the outer surface of the clamping section is provided with a plurality of ribs arranged in parallel.
In one possible design, the two handles are dovetail-shaped.
In one possible design, the handle is provided with a mounting groove, and the mounting groove is provided with a bolt; one end of the adjusting piece is inserted into the bolt.
Through above-mentioned technical scheme, can chucking bulb to use the device and effectively separate the bulb through less power, from this, can improve the difficult circumstances of separating of ceramic bulb and femoral stem. The device is of an X-shaped structure as a whole, adopts a design of 'front short and rear long', and increases the length of a power arm, so that the use process is labor-saving. The device is used for separating the ball head, so that the applicability to the working environment is improved, the ball head and the femoral stem can be effectively separated even in a suspended state, and the device has a hovering positioning function under the condition of separation, so that other operations are convenient to perform.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of an apparatus for separating a ball head from a femoral stem according to one embodiment of the present utility model;
FIG. 2 is a schematic side view of an apparatus for separating a ball head from a femoral stem according to one embodiment of the present utility model;
fig. 3 is a schematic side view of an apparatus for separating a ball head from a femoral stem provided in accordance with the present utility model in one embodiment, wherein the ball head and femoral stem are shown.
In the above figures: the femoral head comprises a handle 1, a clamping section 11, a supporting point section 12, an adjusting section 13, a rotary table 21, a stop seat 22, an adjusting piece 3, a clamping groove 4, a pin 5, a push rod 6, a convex edge 7, an installation groove 81, a bolt 82, a ball head 91 and a femoral stem 92.
Detailed Description
The utility model will be further elucidated with reference to the drawings and to specific embodiments. The present utility model is not limited to these examples, although they are described in order to assist understanding of the present utility model. Specific structural and functional details disclosed herein are merely representative for purposes of describing example embodiments of the present utility model. This utility model may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.
According to particular embodiments of the present disclosure, a device for separating a ball head from a femoral stem is provided. The utility model aims to improve the condition that a ceramic ball head and a femoral stem are not easy to separate, and provides a device for separating the ball head from the femoral stem with a novel structure, so that the device has reasonable structural design and provides powerful instrument assistance for hip joint replacement. The locator can effectively debug the position of the femoral head, namely, provides accurate center location in the total hip surface placement operation, so that the prosthesis is more attached to the human skeleton during installation, thereby more conveniently and firmly installing the joint prosthesis, and ensuring the operation quality and the postoperative effect. Wherein fig. 1-3 illustrate one embodiment.
Referring to fig. 1-3, the device for separating a ball head from a femoral stem includes a handle having a clamping section, a fulcrum section, and an adjustment member; the clamping section is provided with a clamping groove matched with the ball head so as to clamp the ball head; the handles are arranged in two and are rotatably connected through pins, and the pins are arranged on the fulcrum section; the length of the adjusting section is at least twice that of the clamping section, so that a labor-saving arm structure is formed, and the ball head is conveniently pried by small force to help the effective separation of the ball head and the femoral stem.
The adjusting piece is provided with external threads, the locking piece is provided with a threaded hole matched with the external threads, and the locking piece is inserted into the adjusting piece; one of the handles is provided with a mounting hole, and the adjusting piece is inserted into the mounting hole and hinged to the other handle, so that when the locking piece is screwed, the distance between the two handles can be adjusted. That is, the cooperation of regulating part and locking piece can adjust the contained angle between two handles, and then adjusts moment size to can separate bulb and femoral stem effectively.
Through above-mentioned technical scheme, can chucking bulb to use the device and effectively separate the bulb through less power, from this, can improve the difficult circumstances of separating of ceramic bulb and femoral stem. The device is of an X-shaped structure as a whole, adopts a design of 'front short and rear long', and increases the length of a power arm, so that the use process is labor-saving. The device is used for separating the ball head, so that the applicability to the working environment is improved, the ball head and the femoral stem can be effectively separated even in a suspended state, and the device has a hovering positioning function under the condition of separation, so that other operations are convenient to perform.
In one embodiment provided by the present disclosure, the locking member is configured as a turntable, and an anti-slip boss is provided on an outer circumferential surface of the turntable. Therefore, the friction force between the hand and the periphery of the rotary table can be increased, so that the torque force is effectively transmitted to the rotary table, the length of the adjusting piece is further changed, and the force arm and the torque force are indirectly changed.
In one embodiment provided by the disclosure, a stop seat is further arranged between the turntable and the handle, and the diameter of the stop seat is larger than that of the threaded hole; the stop seat is provided with an inner hole matched with the threaded hole; and the stop seat is fixedly connected to the turntable. In this way, on the one hand, the turntable can be spaced relative to the handle, so that the turntable can be screwed easily.
In addition, the setting of backstop seat still is favorable to playing certain early warning locking effect.
In one embodiment provided by the present disclosure, the device for separating the ball head from the femoral stem further comprises a push rod, and the push rod is provided with a stud; the clamping section of one handle is provided with a screw hole matched with the stud, and the propping rod is in threaded connection with the screw hole, so that the other handle can be propped against when the propping rod is screwed, and the application range of the device is enlarged.
Thus, even in the case of inconvenient operation or in the limited space of obesity of patients, the ceramic ball head and the femoral stem can be separated by screwing in the push rod. Based on the arrangement of the screw, the push rod can be pushed steplessly, so that the push degree of the other handle is adjusted.
In one embodiment provided by the disclosure, the end face of the push rod, which points to the handle, is configured to be a spherical surface, which is beneficial to enabling the push rod to smoothly push against the other handle.
In this disclosure, the clamping section of two handles inclines towards the outside to form and stick up the mouth, through these two laminating bulb or the femoral stem that stick up mouthful that can be better, and then separate the bulb effectively fast.
In one embodiment provided by the present disclosure, the outer surface of the clamping section is provided with a plurality of ribs arranged in parallel. Therefore, friction force between the clamping section and the ball head or between the clamping section and the femoral stem can be increased, and slipping is avoided, so that the ball head can be effectively separated.
In the present disclosure, the two handles are dovetail-shaped, thereby making it convenient for a doctor to hold the work with both hands and having an attractive appearance based on such a design of human body aesthetics.
In one embodiment provided by the disclosure, the handle is provided with a mounting groove, and the mounting groove is provided with a bolt; one end of the adjusting piece is inserted into the bolt, so that the adjusting piece can be hinged to the bolt to rotate within a certain range during positioning, and therefore the rigid acting force is removed, and the influence on the other handle is reduced.
The utility model has the beneficial effects that:
1) An operator clamps the joint of the ceramic ball head and the femoral stem through the device and can apply force at the tail end of the handle to separate the ceramic ball head from the femoral stem;
2) Under the condition of inconvenient operation in operation or under the obesity space of a patient, the ceramic ball head and the femoral stem can be separated by screwing in the push rod. The device can flexibly adjust the ejection length of the ejector rod according to patients with different sizes and the sizes of actual patients, so that the ball head is effectively separated, and the device has a simple structure and is convenient to operate;
3) Through the cooperation of the locking piece and the adjusting piece, the hovering positioning function can be provided under the condition that the ceramic ball and the bone stem cannot be separated at one time; the outer surface of the locking piece adopts a reticulate pattern structure, so that the locking piece is convenient to screw in and increases friction force;
4) The convex ribs are arranged, so that an anti-slip structure can be formed at the contact position of the clamping section, the ceramic ball head and the femoral stem, friction force is increased, and the sliding risk of the ceramic ball head and the femoral stem is reduced;
5) The device is of an X-shaped structure as a whole, adopts a design of 'front short and rear long', takes a pin as a center, has a leverage effect, and increases the length of a power arm, so that the use process is labor-saving.
Finally, it should be noted that the utility model is not limited to the alternative embodiments described above, but can be used by anyone in various other forms of products in the light of the present utility model. The above detailed description should not be construed as limiting the scope of the utility model, which is defined in the claims and the description may be used to interpret the claims.
Claims (9)
1. A device for separating a ball head from a femoral stem comprising a handle, a locking member and an adjustment member, the handle having a gripping section, a fulcrum section and an adjustment section; the clamping section is provided with a clamping groove matched with the ball head so as to clamp the ball head; the handles are arranged in two and are rotatably connected through pins, and the pins are arranged on the fulcrum section; the length of the adjustment section is at least twice the length of the clamping section;
the adjusting piece is provided with external threads, the locking piece is provided with a threaded hole matched with the external threads, and the locking piece is inserted into the adjusting piece;
one of the handles is provided with a mounting hole, and the adjusting piece is inserted into the mounting hole and hinged to the other handle, so that when the locking piece is screwed, the distance between the two handles can be adjusted.
2. The device for separating a ball head from a femoral stem according to claim 1, wherein the locking element is provided as a rotating disc, the outer circumferential surface of which is provided with anti-slip bosses.
3. The device for separating a ball head from a femoral stem of claim 2, wherein a stop seat is further provided between the turntable and the handle, the stop seat having a diameter greater than the threaded bore;
the stop seat is provided with an inner hole matched with the threaded hole; and the stop seat is fixedly connected to the turntable.
4. The device for separating a ball head from a femoral stem of claim 1, further comprising a push rod having a stud disposed thereon; the clamping section of one handle is provided with a screw hole matched with the stud, and the propping rod is in threaded connection with the screw hole so as to prop against the other handle when the propping rod is screwed.
5. The device for separating a ball head from a femoral stem of claim 4, wherein the end surface of the push rod directed toward the handle is configured as a spherical surface.
6. The device for separating a ball head from a femoral stem of claim 1, wherein the gripping sections of the two handles are inclined outwardly to form a cocking.
7. The device for separating a ball head from a femoral stem of claim 1, wherein the outer surface of the gripping section is provided with a plurality of parallel disposed fins.
8. The device for separating a ball head from a femoral stem of claim 1, wherein the two handles are dovetail-shaped.
9. The device for separating a ball head from a femoral stem of claim 1, wherein the handle has a mounting slot with a latch thereon; one end of the adjusting piece is inserted into the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222975145.6U CN219439572U (en) | 2022-11-08 | 2022-11-08 | Device for separating a ball head from a femoral stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222975145.6U CN219439572U (en) | 2022-11-08 | 2022-11-08 | Device for separating a ball head from a femoral stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219439572U true CN219439572U (en) | 2023-08-01 |
Family
ID=87423004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222975145.6U Active CN219439572U (en) | 2022-11-08 | 2022-11-08 | Device for separating a ball head from a femoral stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219439572U (en) |
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2022
- 2022-11-08 CN CN202222975145.6U patent/CN219439572U/en active Active
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