CN217430142U - Reduction fixing device for femoral neck fracture - Google Patents
Reduction fixing device for femoral neck fracture Download PDFInfo
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- CN217430142U CN217430142U CN202220205251.3U CN202220205251U CN217430142U CN 217430142 U CN217430142 U CN 217430142U CN 202220205251 U CN202220205251 U CN 202220205251U CN 217430142 U CN217430142 U CN 217430142U
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- femoral neck
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Abstract
The utility model discloses a femoral neck fracture fixing device that resets relates to the medical instrument field. The fixing device comprises a main nail, wherein the cross section of the main nail is broad bean-shaped, and a tapered end screw penetrates through the end face of the near end of the main nail; the pressurizing screw penetrates through the near end of the main nail through the first through hole, the penetrating end of the pressurizing screw is provided with a first thread, and a screw rod of the pressurizing screw is provided with a pressurizing adjusting mechanism capable of adjusting the penetrating length of the pressurizing screw; and the supporting screw penetrates through the far end of the main screw through the second through hole, the penetrating end of the supporting screw is provided with a second thread, and the second thread is abutted against the first thread so that the pressurizing screw and the supporting screw are fixed in a crossed manner. The fixing device is used for reduction of femoral neck fracture and has a support structure for stabilizing the joint.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a femoral neck fracture fixing device that resets.
Background
The femoral neck fracture and the intertrochanteric fracture belong to proximal femoral fractures, but the difference between the proximal femoral fracture and the intertrochanteric fracture is large, in position, the femoral neck is closer to a joint and is wrapped by a joint capsule, so the femoral neck fracture belongs to intracapsular fracture, and the intertrochanteric fracture belongs to extracapsular fracture. The femoral neck fracture is wrapped by the joint capsule, so the fracture displacement is generally small, the pain is generally light, the bleeding at the fracture end is concentrated in the joint capsule, and the condition of no obvious swelling and ecchymosis or swelling and ecchymosis at the local part is light due to the constraint of the joint capsule, and the shortening of the affected limb and the external rotation deformity are also light. Because the intertrochanteric fracture position of femur is located outside the joint capsule, the intertrochanteric part of femur is cancellous bone, and the muscle attachment points are more, the fracture displacement is usually larger, the pain degree is more severe than the fracture of femoral neck, the bleeding at the fracture end is more, the swelling of local soft tissues and subcutaneous ecchymosis are heavier, the external rotation and the shortening deformity of the affected limb are obvious, and the dysfunction is serious.
Therefore, the two methods are different in treatment, the treatment of the intertrochanteric femoral fracture is mainly reset and internal fixation, the treatment of the femoral neck fracture depends on the age and the fracture displacement condition, the artificial joint replacement can be considered for the older, such as over 60 years old and the serious fracture displacement, and the resetting and internal fixation can be carried out for the femoral neck fracture with the younger age or without the displacement and the smaller displacement.
In practical clinical application, two fracture conditions are common in the elderly, so that the treatment mode of femoral neck fracture by using an internal fixation operation is far less than that of intertrochanteric fracture, and when the femoral neck fracture is internally fixed, the internal fixation device which is the same as that of intertrochanteric fracture is often adopted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a fixing device with a stable structure is provided specially for femoral neck fracture.
In order to solve the technical problem, the utility model discloses the technical scheme who takes is:
a reduction and fixation device for femoral neck fracture is characterized by comprising a main nail, wherein the cross section of the main nail is in a broad bean shape, a tapered end screw penetrates through the end surface of the near end of the main nail, a first through hole is formed in the side wall of the near end of the main nail, and a second through hole is formed in the side wall of the far end of the main nail; the pressurizing screw penetrates through the main nail through the first through hole, the penetrating end of the pressurizing screw is provided with a first thread, and a screw rod of the pressurizing screw is provided with a pressurizing adjusting mechanism capable of adjusting the penetrating length of the pressurizing screw; and the supporting screw penetrates through the main nail through the second through hole, the penetrating end of the supporting screw is provided with a second thread, and the second thread is abutted against the first thread so that the pressurizing screw and the supporting screw are fixed in a crossed manner.
The technical scheme is that the pressurizing adjusting mechanism comprises an accommodating groove which is formed in the side wall of the pressurizing screw, clamping blocks which are distributed in an array mode along the length direction of the pressurizing screw are fixed in the accommodating groove, and an accommodating gap is formed between every two clamping blocks; the inserting head is fixed at the far end of the tapered end screw and can be inserted into any accommodating gap to be contacted with the clamping block.
The further technical scheme is that the far end of the main nail is provided with a tuning fork structure.
The technical scheme is that an anti-rotation strip is fixed on the compression screw and is fixed on the side wall of the compression screw, which is different from the position of the accommodating groove, along the length direction of the compression screw; and an anti-rotation channel for accommodating the anti-rotation strip to pass through is correspondingly formed on the hole wall of the first through hole.
The further technical scheme is that the axes of the pressurizing screws and the supporting screws are crossed in an included angle in the horizontal direction and the vertical direction.
The technical scheme is that the heads of the pressurizing screw, the supporting screw and the lock head screw are all provided with force application grooves capable of being connected with other surgical instruments.
The technical scheme is that the contact position of the tapered end screw and the clamping block deviates from a vertical plane where the axis of the pressurizing screw is located.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the main nail design is directed at the femoral neck, and the length is shorter, does not need distal end fixed.
The main nail is broad bean-shaped in cross section, is different from common circular nails, is flat in shape, can play a role in preventing rotation in marrow, ensures the stability of an internal fixing system, can also act outside the marrow, enables the arc concave surface of the main nail to be attached to the shape of the femur, realizes the fixation outside the marrow, and is suitable for the femoral neck fracture phenomena in more conditions.
Simultaneously, utilize main nail, forcing screw and supporting screw to form triangular stable structure, stress concentration can not appear, and the area that broad bean shape cross section's main nail can become forcing screw and supporting screw nailing position by the selection is bigger to the position selection scope that can be selected is wider, makes things convenient for the contained angle that forms the horizontal direction between the two, thereby the two and main nail constitute the triangle-shaped on the spatial structure, make whole system more stable.
In addition, a pressurizing adjusting mechanism matched with the tapered end screw is fixed on the pressurizing screw, and the pressurizing screw can move on the main nail along the axis of the main nail to a certain extent, so that the proximal end of the femur is pressurized.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic sectional view of the present invention;
fig. 3 is a schematic top view of the present invention;
FIG. 4 is an enlarged view of the portion A of FIG. 1;
fig. 5 is a schematic structural view of the main nail of the present invention;
FIG. 6 is a schematic cross-sectional view of the main nail of the present invention;
fig. 7 is a schematic structural view of the compression screw according to the present invention (including a lock screw);
fig. 8 is a schematic top view of the compression screw according to the present invention (including a tapered head screw).
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments only in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 8, a reduction fixation device for femoral neck fracture comprises a main nail 1, the cross section of which is broad bean-shaped, a tapered end screw 10 penetrates through the end surface of the proximal end of the main nail 1, a first through hole 11 is formed in the side wall of the proximal end of the main nail 1, and a second through hole 12 is formed in the side wall of the distal end of the main nail 1; the compression screw 2 penetrates through the main nail 1 through a through hole I11, a thread I21 is arranged at the penetrating end of the compression screw 2, and a compression adjusting mechanism 20 capable of adjusting the penetrating length of the compression screw 2 is arranged on the screw rod of the compression screw 2; and the supporting screw 3 penetrates through the main nail 1 through the second through hole 12, the penetrating end of the supporting screw 3 is provided with a second thread 31, and the second thread 31 is abutted against the first thread 21 so that the pressurizing screw 2 and the supporting screw 3 are fixed in a crossed manner.
The main nail 1 of the fixation device is designed for the femoral neck, is short in length and does not need distal fixation. The main nail 1 is broad bean-shaped in cross section, is different from common circular nails, is flat in shape, can play a role in preventing rotation in marrow, ensures the stability of an internal fixing system, can act outside the marrow, enables an arc concave surface to be attached to the shape of the femur, realizes the fixation outside the marrow, and is suitable for femoral neck fracture phenomena in more conditions. Simultaneously, utilize main nail 1, forcing screw 2 and supporting screw 3 to form triangular stable structure, stress concentration can not appear, and broad bean shape cross section's main nail 1 to can be selected to become forcing screw 2 and supporting screw 3 and go into the area of nailing the position bigger to the position selection scope of going into the nail is wider, makes things convenient for the contained angle that forms the horizontal direction between the two, thereby the two is followed closely 1 with the main triangle-shaped of constituteing on the spatial structure, makes entire system more stable.
Therefore, in the using process, firstly, the posture of a patient is adjusted, an operation approach is determined, under the condition of intramedullary fixation, a guide device is arranged through an opening at the proximal end (mostly the tip of a greater trochanter) of a femur, a main nail 1 is placed after reaming, an incision is made at the outer side of the femur, skin, subcutaneous tissues, separated muscles and the like are sequentially cut to expose the femur, a guide pin is screwed into the femur through a first through hole 11 of the main nail 1, a compression screw 2 is placed after the position is determined to be proper in an intraoperative perspective mode, and then a support screw 3 is placed in the same way; when the main nail 1 is fixed outside the marrow, the step of inserting the main nail 1 into the marrow is omitted, and the main nail 1 is fixed outside the marrow by attaching the femur.
Furthermore, a compression adjustment mechanism 20 that engages with the tapered screw 10 is fixed to the compression screw 2, so that the compression screw 2 can move on the main nail 1 along the axis thereof to a certain extent, thereby compressing the proximal end of the femur. Ensuring the reduction of the thighbone. The pressurizing adjusting mechanism 20 comprises a receiving groove 201 which is formed in the side wall of the pressurizing screw 2, fixture blocks 202 which are distributed in an array manner along the length direction of the pressurizing screw 2 are fixed in the receiving groove 201, and a receiving gap 203 is formed between every two fixture blocks 202; the insertion head 101 is fixed to the distal end of the tapered end screw 10 and can be inserted into any one of the receiving gaps 203 to contact the latch 202.
Namely, the pressing force of the compression screw 2 on the proximal end of the femur is adjusted by clamping the insertion head 101 in different accommodation gaps 203, during use, the locking head screw 10 is screwed up, the compression screw 2 can move along the axis, and the locking head screw 10 is screwed after moving to a proper position, so that the insertion head 101 penetrates through the accommodation gap 203 and is abutted against the clamping block 202, and the compression screw 2 is prevented from displacing after abutting. Moreover, an anti-rotation strip 22 is fixed on the compression screw 2, and the anti-rotation strip 22 is fixed on the side wall of the compression screw 2, which is different from the position of the accommodating groove 201, along the length direction of the compression screw 2; the hole wall of the first through hole 11 is correspondingly provided with an anti-rotation channel 111 for accommodating the anti-rotation strip 22 to pass through, so that the compression screw 2 cannot rotate, and the stress stability of the whole fixing system is guaranteed.
In addition, the tuning fork structure 13 is arranged at the far end of the main nail 1, so that the main nail 1 can be more smoothly placed in the marrow, violent implantation is avoided, the stress on the end face of the main nail 1 is reduced, and the tail part of the main nail 1 is prevented from being broken. The axes of the pressure screw 2 and the supporting screw 3 are crossed in the horizontal direction and the vertical direction at an included angle. Thereby forming a stable spatial triangular structure.
In the operation process, other surgical instruments such as a guider need to be matched, so the head parts of the pressurizing screw 2, the supporting screw 3 and the tapered end screw 10 are all provided with force application grooves 4 capable of being connected with other surgical instruments.
In order to secure the strength of the compression screw 2 itself, the position where the tapered end screw 10 contacts the fixture block 202 is deviated from the vertical plane on which the axis of the compression screw 2 is located. Namely, the position of the accommodating groove 201 is provided with an offset axis, so that the toughness of the compression screw 2 is not influenced by overlarge grooving, the lock head screw 10 applies force on the side of the axis, the anti-rotation strip 22 on the compression screw 2 is inserted into the main nail 1, and the compression screw 2 and the main nail 1 are connected more stably under the combined action of the two.
The above is only the preferred embodiment of the present invention, and any person can make some simple modifications, deformations and equivalent replacements according to the present invention, all fall into the protection scope of the present invention.
Claims (7)
1. A femoral neck fracture reduction fixation device, comprising:
the cross section of the main nail (1) is broad bean-shaped, a tapered end screw (10) penetrates through the end face of the near end of the main nail (1), a first through hole (11) is formed in the side wall of the near end of the main nail (1), and a second through hole (12) is formed in the side wall of the far end of the main nail (1);
the compression screw (2) penetrates through the main nail (1) through a first through hole (11) and is provided with a first thread (21) at the penetrating end, and a compression adjusting mechanism (20) capable of adjusting the penetrating length of the compression screw (2) is arranged on a screw rod of the compression screw (2);
and the supporting screw (3) penetrates through the main nail (1) through the second through hole (12), the penetrating end of the supporting screw is provided with a second thread (31), and the second thread (31) is abutted against the first thread (21) so that the pressurizing screw (2) and the supporting screw (3) are fixed in a crossed manner.
2. A femoral neck fracture reduction fixation device as in claim 1, wherein the compression adjustment mechanism (20) comprises:
the clamping device comprises a containing groove (201) which is formed in the side wall of a pressurizing screw (2), clamping blocks (202) which are distributed in an array mode along the length direction of the pressurizing screw (2) are fixed in the containing groove (201), and a containing gap (203) is formed between every two clamping blocks (202);
and the insertion head (101) is fixed at the distal end of the tapered end screw (10) and can be inserted into any one of the accommodating gaps (203) to be contacted with the clamping block (202).
3. A femoral neck fracture reduction fixation device according to claim 1, characterized in that the distal end of the main nail (1) has a tuning fork structure (13).
4. A femoral neck fracture reduction fixation device according to claim 1, wherein the compression screw (2) is fixed with an anti-rotation strip (22), and the anti-rotation strip (22) is fixed on the side wall of the compression screw (2) which is different from the position of the accommodating groove (201) along the length direction of the compression screw (2);
and an anti-rotation channel (111) for accommodating the anti-rotation strip (22) to pass through is correspondingly formed on the wall of the first through hole (11).
5. A femoral neck fracture reduction fixation device according to claim 1, characterized in that the axes of the compression screw (2) and the support screw (3) are crossed at an included angle in both horizontal and vertical directions.
6. The reduction and fixation device for femoral neck fracture according to claim 1, characterized in that the head of the compression screw (2), the head of the support screw (3) and the head of the tapered screw (10) are provided with force application grooves (4) which can be connected with surgical instruments.
7. A femoral neck fracture reduction fixation device according to claim 2, wherein the position of the tapered head screw (10) contacting the fixture block (202) deviates from the vertical plane of the axis of the compression screw (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220205251.3U CN217430142U (en) | 2022-01-25 | 2022-01-25 | Reduction fixing device for femoral neck fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220205251.3U CN217430142U (en) | 2022-01-25 | 2022-01-25 | Reduction fixing device for femoral neck fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217430142U true CN217430142U (en) | 2022-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220205251.3U Active CN217430142U (en) | 2022-01-25 | 2022-01-25 | Reduction fixing device for femoral neck fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217430142U (en) |
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- 2022-01-25 CN CN202220205251.3U patent/CN217430142U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230621 Address after: No. 320, Changcheng North Street, Baoding City, Hebei Province 071000 Patentee after: BAODING NO.1 CENTRAL Hospital Address before: Room 602, Unit 5, Building 8, Area B, No. 972, Wusi East Road, Lianchi District, Baoding City, Hebei Province, 071000 Patentee before: Long Yubin |
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| TR01 | Transfer of patent right |