CN213156368U - Combined screw capable of improving fixing effect of femoral neck fracture of child - Google Patents
Combined screw capable of improving fixing effect of femoral neck fracture of child Download PDFInfo
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- CN213156368U CN213156368U CN202021167501.6U CN202021167501U CN213156368U CN 213156368 U CN213156368 U CN 213156368U CN 202021167501 U CN202021167501 U CN 202021167501U CN 213156368 U CN213156368 U CN 213156368U
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Abstract
The utility model provides a can improve fixed effect's of children femoral neck fracture combination screw, belongs to orthopedics medical instrument technical field for fix children femoral neck fracture. The technical scheme is as follows: outer nail is the sleeve pipe screw, there is sleeve pipe screw thread on the anterior outer wall of outer nail, the sleeve pipe hole rear portion of outer nail has the hole screw thread, the length of interior nail is greater than the sleeve pipe length of outer nail, the anterior diameter of the body of rod of interior nail is less than the sleeve pipe hole diameter of outer nail, the anterior most advanced point of the body of rod of interior nail is sharp-pointed, there is the sleeve pipe hole screw thread phase-match of interior nail external screw thread and outer nail on the body of rod rear portion outer wall of interior nail, the sleeve pipe front end of outer nail is stretched out to the body of rod front end of interior nail, the body of rod rear portion of interior nail. The utility model discloses simple structure, convenient to use have played the effect of extension hollow screw arm of force, reinforcing fixed stability, have avoided original ke shi needle and hollow screw to produce relative slip's drawback, can strengthen fixed effect on the basis that does not increase the operation risk.
Description
Technical Field
The utility model relates to a combined screw for treating femoral neck fracture of children, belonging to the technical field of orthopedic medical instruments.
Background
Femoral neck fractures are relatively common in adults, but are relatively rare in children, accounting for less than 1% of all children. Fracture of femoral neck in children is usually caused by high energy injury, such as car accident injury, high falling injury, etc., and 30% of the probability is accompanied by injury of limbs, parenchymal viscera, head, etc. Although not as common as other fractures, the incidence of long-term complications of femoral neck fractures in children is high and the prognosis is poor. The complications include avascular osteonecrosis of the femoral head, hip varus, fracture nonunion, early closure of epiphyseal plate and the like. Thus, clinically, the treatment of such fractures is much more difficult than adult femoral neck fractures.
At present, the treatment modes of the femoral neck fracture of children are various, including conservative treatment of the hip herringbone plaster and surgical treatment of kirschner wires, hollow screws, DHS and the like. Because the surgical method for treating the femoral neck fracture of the child by using the closed reduction hollow screw and the kirschner wire has the advantages of small wound and the like, the fixation mode of the hollow compression screw is generally advocated at present. In operation, the screws do not pass through the epiphyseal plate, providing both stable fixation and no disruption to the epiphyseal plate. When the femoral neck of the infant is thin, only 2 screws can be penetrated, and 3 to 4 hollow screws cannot be accommodated, and the kirschner wire can be penetrated through the epiphysis plate independently, so that the screws and the kirschner wire are arranged in a Chinese character 'pin' or diamond shape, and the fixing mode is ideal. However, when the hollow screw is used alone for fixation, the following problems are also caused. In the case of underhead and transcervical fractures, the distance between the fractured end and the epiphyseal plate is often short, resulting in insufficient length of the screw penetrating into the proximal end of the femoral neck and poor fixation strength. Therefore, how to avoid the influence on the epiphyseal plate when the epiphyseal plate is fixed by only using the hollow screw, and ensuring the stability and the fixing effect of the fixation is the problem to be solved by medical staff.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a can improve the fixed effect's of children's thighbone neck fracture combination screw is provided, this kind of combination screw can strengthen the fixed stability of hollow screw, can avoid ke shi needle and hollow screw to take place relative slip simultaneously, on the basis that does not increase the operation risk, improves the fixed effect of operation.
The technical scheme for solving the technical problems is as follows:
the utility model provides a can improve combination screw of fixed effect of children's femoral neck fracture, it comprises outer nail and interior nail, outer nail is the sleeve pipe screw, there is sleeve pipe screw thread on the anterior outer wall of outer nail, the sleeve pipe hole rear portion of outer nail has hole screw thread, interior nail is the stock, the length of interior nail is greater than the sleeve pipe length of outer nail, the anterior diameter of the body of rod of interior nail is less than the sleeve pipe hole diameter of outer nail, the anterior most advanced point of the body of rod of interior nail is sharp-pointed, the body of rod rear portion diameter of interior nail and the sleeve pipe hole diameter phase-match of outer nail, there is the sleeve pipe hole screw thread phase-match of interior nail external screw thread and outer nail on the body of rod rear portion outer wall of interior nail, the body of rod of interior nail is worn in the sleeve pipe of outer nail, the body of rod front end of interior nail stretches out the sleeve.
Above-mentioned combination screw that can improve children's femoral neck fracture fixed effect, the body of rod of interior nail comprises the three-section, and the anterior diameter of the body of rod of interior nail is the same with ke shi needle diameter, and the body of rod rear portion diameter of interior nail and the sleeve pipe hole diameter phase-match of outer nail, the body of rod middle part of interior nail are the conical body of rod, and the front end and the rear end of the conical body of rod are connected with the anterior portion of the body of rod and the rear portion of interior nail respectively are smooth.
The utility model has the advantages that:
the utility model discloses a composite construction of outer nail and interior nail, the front end of interior nail is the same with the ke shi needle, has played the effect of ke shi needle, and the rear portion of interior nail has outside screw thread to be connected with the hole screw thread of outer nail, can avoid producing relative slip between interior nail and the outer nail.
The utility model discloses simple structure, convenient to use, fixed stable, the integrated configuration through outer nail and interior nail has played the extension hollow screw arm of force, has strengthened the effect of fixed stability, has avoided original ke shi needle and hollow screw to produce relative slip's drawback simultaneously, can strengthen fixed effect on the basis that does not increase the operation risk, has solved the problem that fixed strength and wound can't be compromise for a short time in the hollow screw fixation operation of children's femoral neck fracture.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic view of the usage state of the present invention.
The figures are labeled as follows: the external nail comprises an external nail 1, an internal nail 2, a sleeve thread 3, an inner hole thread 4, an internal nail external thread 5, a femur 6, a femoral neck fracture line 7 and an epiphysis plate 8.
Detailed Description
The utility model discloses constitute by outer nail 1 and interior nail 2.
Fig. 1 shows that the outer nail 1 is a long sleeve, the outer wall of the front part of the outer nail 1 is provided with a sleeve thread 3, and the rear part of the inner hole wall of the sleeve of the outer nail 1 is provided with an inner hole thread 4. The outer nail 1 is designed based on the traditional hollow screw, and the rear 2/3 part is added with an inner hole thread 4 inside, and a space is reserved for accommodating the guide pin and the inner nail 2 to pass through.
Fig. 1 shows that the inner nail 2 is a long rod, and the length of the inner nail 2 is larger than the length of the sleeve of the outer nail 1. The rod body of the inner nail 2 consists of three sections.
The diameter of the front part of the rod body of the inner nail 2 is the same as that of the Kirschner wire and is smaller than the diameter of the inner hole of the sleeve of the outer nail 1, and the tip of the front part of the rod body of the inner nail 2 is sharp and plays the same role as the Kirschner wire; the diameter of the rear part of the rod body of the inner nail 2 is matched with the diameter of the inner hole of the sleeve of the outer nail 1, and the outer wall of the rear part of the rod body of the inner nail 2 is provided with an inner nail external thread 5 matched with the sleeve inner hole thread 4 of the outer nail 1; the middle part of the rod body of the inner nail 2 is a conical rod body, and the front end and the rear end of the conical rod body are respectively and smoothly connected with the front part and the rear part of the rod body of the inner nail 2.
Fig. 1 shows that the rod body of the inner nail 2 is penetrated in the sleeve of the outer nail 1, the front end of the rod body of the inner nail 2 extends out of the front end of the sleeve of the outer nail 1, and the rear part of the rod body of the inner nail 2 is connected with the rear part of the sleeve of the outer nail 1 through threads.
Fig. 2 shows that the utility model is used as follows:
under the perspective of a C-shaped arm X-ray perspective machine, a kirschner wire guide pin is penetrated from the femur side, an outer nail 1 is screwed in along the kirschner wire guide pin, the function of the outer nail 1 is equivalent to that of a traditional pressurizing hollow screw, the front end of the outer nail 1 penetrates through a femoral neck fracture line 6 to connect the femoral neck fracture parts, but the front end of the outer nail 1 does not exceed an epiphysis plate 7 so as to avoid influencing the development of the epiphysis;
after the outer nail 1 is fixed, the inner nail 2 is screwed in through the outer nail 1, the front end of the inner nail 2 penetrates through the epiphyseal plate 7, the function of the inner nail 2 is equivalent to that of a traditional kirschner wire, the rear part of the inner nail 2 is in threaded fixation with the inner hole thread 4 of the rear part of the outer nail 1 through the inner nail external thread 5, and relative sliding cannot be generated.
The utility model discloses a 2 front ends of interior nail have passed epiphysis board 7, have reduced the influence that hollow screw can't pass epiphysis board 7, have both guaranteed fixed stability, furthest reduces the interference to epiphysis board 7 again. Meanwhile, the defect that the original kirschner wire and the hollow screw slide relatively is overcome, the fixing effect of the operation can be enhanced on the basis of not increasing the operation risk, and the problem that the fixing strength and the wound are small and cannot be taken into consideration in the operation of fixing the hollow screw for femoral neck fracture of children is solved.
The utility model discloses an embodiment as follows:
the outer diameter of the outer nail 1 is 6.5mm, the inner hole diameter is 3.5mm, and the length of the inner hole thread 4 is 35 mm;
the diameter of the front part of the inner nail 2 is 2.0mm, the length is 20mm, the diameter of the rear part is 3.5mm, the length is 35mm, the length of the outer thread 5 of the inner nail is 30mm, and the length of the middle conical rod body is 10 mm.
Claims (2)
1. The utility model provides a can improve the fixed effect's of children's femoral neck fracture combination screw which characterized in that: it comprises outer nail (1) and interior nail (2), outer nail (1) is the sleeve pipe screw, there are sleeve pipe screw thread (3) on the anterior outer wall of outer nail (1), the sleeve pipe hole rear portion of outer nail (1) has hole screw thread (4), interior nail (2) is the stock, the length of interior nail (2) is greater than the sleeve pipe length of outer nail (1), the anterior diameter of the body of rod of interior nail (2) is less than the sleeve pipe hole diameter of outer nail (1), the anterior most advanced point of the body of rod of interior nail (2) is sharp-pointed, the body of rod rear portion diameter of interior nail (2) and the sleeve pipe hole diameter phase-match of outer nail (1), there are interior nail external screw thread (5) and sleeve pipe hole screw thread (4) phase-match of outer nail (1) on the body of rod rear portion outer wall of interior nail (2), the body of rod of interior nail (2) is worn in the sleeve pipe of outer nail, the front end of the rod body of the inner nail (2) extends out of the front end of the sleeve of the outer nail (1), and the rear part of the rod body of the inner nail (2) is connected with the rear part of the sleeve of the outer nail (1) through threads.
2. The combination screw of claim 1, capable of improving the fixation of femoral neck fractures in children, characterized in that: the body of rod of interior nail (2) comprises the three-section, and the anterior diameter of the body of rod of interior nail (2) is the same with kirschner wire diameter, and the body of rod rear portion diameter of interior nail (2) and the sleeve pipe hole diameter phase-match of outer nail (1), the body of rod middle part of interior nail (2) is the conical body of rod, and the front end and the rear end of the conical body of rod are respectively with the anterior smooth connection of the body of rod and the rear portion of interior nail (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021167501.6U CN213156368U (en) | 2020-06-22 | 2020-06-22 | Combined screw capable of improving fixing effect of femoral neck fracture of child |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021167501.6U CN213156368U (en) | 2020-06-22 | 2020-06-22 | Combined screw capable of improving fixing effect of femoral neck fracture of child |
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| Publication Number | Publication Date |
|---|---|
| CN213156368U true CN213156368U (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021167501.6U Active CN213156368U (en) | 2020-06-22 | 2020-06-22 | Combined screw capable of improving fixing effect of femoral neck fracture of child |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114533235A (en) * | 2022-02-24 | 2022-05-27 | 中国人民解放军总医院第七医学中心 | Children epiphyseal plate damage fixing device that resets |
-
2020
- 2020-06-22 CN CN202021167501.6U patent/CN213156368U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114533235A (en) * | 2022-02-24 | 2022-05-27 | 中国人民解放军总医院第七医学中心 | Children epiphyseal plate damage fixing device that resets |
| CN114533235B (en) * | 2022-02-24 | 2022-12-02 | 中国人民解放军总医院第七医学中心 | Children epiphyseal plate damage fixing device that resets |
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