CN210019595U - Intramedullary nail for femur - Google Patents
Intramedullary nail for femur Download PDFInfo
- Publication number
- CN210019595U CN210019595U CN201920301685.1U CN201920301685U CN210019595U CN 210019595 U CN210019595 U CN 210019595U CN 201920301685 U CN201920301685 U CN 201920301685U CN 210019595 U CN210019595 U CN 210019595U
- Authority
- CN
- China
- Prior art keywords
- screw
- intramedullary
- nail
- hole
- proximal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model provides an intramedullary nail for thighbone belongs to medical instrument technical field, and it includes: intramedullary main nail, proximal screw, locking screw, cortical screw, tail cap and compression screw. The intramedullary main nail is provided with an irregularly-shaped proximal end, the proximal end of the intramedullary main nail is provided with a first through hole matched with the proximal screw and a second through hole matched with the locking screw, the proximal screw comprises a nail rod and a nail head, and the nail rod is provided with a fourth through hole matched with the locking screw. The intramedullary nail for the thighbone provided by the utility model can effectively prevent the rotation of the intramedullary main nail due to the design that the near end of the intramedullary main nail is in an irregular shape. After the operation is finished, an approximately triangular structure is formed among the intramedullary main nail, the proximal screw and the locking screw, so that the proximal screw is effectively prevented from withdrawing from the first through hole, and the problem that the proximal screw is easy to loosen and withdraw is effectively solved.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to intramedullary nail for thighbone.
Background
Fracture around the femoral trochanter is multiple fracture of old people, should begin the operation treatment early, and its surgical method is many, and intramedullary nail is widely accepted in the operation. Since the invention of the last century, intramedullary nails have been widely used due to their advantages of wide adaptation, small surgical trauma, firm fixation, strong torsional stress, small stress shielding effect, etc. However, the current intramedullary nail for femur has the defects that the intramedullary main nail is easy to rotate, the proximal screw is easy to loosen and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an intramedullary nail for thighbone, which solves the problems of the prior intramedullary nail.
In order to achieve the above object, the present invention provides an intramedullary nail for femur, which comprises: the intramedullary nail, the proximal screw, the locking screw, the cortical screw, the tail cap and the compression screw;
the intramedullary main nail is provided with an irregular-shaped near end and a forked far end, the intramedullary main nail is provided with a central through hole penetrating through the near end and the far end, the central through hole at the near end of the intramedullary main nail is provided with a first threaded part and a second threaded part, the near end of the intramedullary main nail is provided with a first through hole matched with a near end screw and a second through hole matched with a locking screw, the axis of the first through hole and the near end of the intramedullary main nail form an included angle of 50-90 degrees, the axis of the second through hole and the near end of the intramedullary main nail form an included angle of 30-70 degrees, and the far end of the intramedullary main nail is provided with a third through hole matched with a cortical bone screw;
the near-end screw comprises a screw rod and a screw head, the near-end screw is provided with a central through hole penetrating through the screw rod and the screw head, and the screw rod is provided with a fourth through hole matched with the locking screw;
the locking screw comprises a screw rod and a screw head, and the screw rod of the locking screw is provided with threads;
the cortical bone screw comprises a screw rod and a screw head, and the screw rod of the cortical bone screw is provided with threads;
the tail cap comprises a head part and a tail part, the head part is provided with a semicircular guide part and a thread for connecting the tail part, and the tail part is provided with an outer hexagonal driving part;
the compression screw is provided with a through hole penetrating through the upper end face and the lower end face, the compression screw is provided with a head part and a tail part, the head part is provided with a cylindrical compression column and an external thread connected with the tail part, and the tail part is provided with an inner hexagonal drive.
Further, the proximal end of the intramedullary main nail extends to the distal end and is arranged at an angle of 1-30 degrees, preferably at an angle of 1-15 degrees.
Further, the distal end of the intramedullary main nail is circular.
Further, two grooves are symmetrically arranged on the side wall of the far end of the intramedullary main nail.
Further, the third through hole is in a long hole shape.
Furthermore, the axial line of the first through hole and the near end of the main intramedullary nail form an included angle of 60-80 degrees, and the axial line of the second through hole and the near end of the main intramedullary nail form an included angle of 40-60 degrees.
Further, after the locking screw passes through the second through hole, the locking screw continues to pass through the fourth through hole, so that an approximately triangular structure is formed among the intramedullary main nail, the proximal screw and the locking screw.
Furthermore, a tail cap and a compression screw are arranged in a central through hole of the intramedullary main nail from top to bottom, the lower end of the compression screw compresses the near-end screw, the compression screw is in threaded connection with a second threaded part of the intramedullary main nail, the tail cap is connected with a first threaded part of the intramedullary main nail, and the tail cap compresses the compression screw.
Further, the head has an external thread or a screw type blade.
To sum up, the intramedullary nail for femur provided by the utility model can effectively prevent the rotation of the intramedullary main nail due to the design that the proximal end of the intramedullary main nail is irregular. The utility model provides a be different from the applicant at the public technical scheme who solves near-end screw not hard up of CN106073877A before, the back is accomplished in the operation, forms approximate triangle-shaped's structure between intramedullary main nail, near-end screw, the locking screw, can prevent effectively that the near-end screw from withdrawing from in the first through-hole to effectively solve the problem that the near-end screw easily becomes flexible and withdraws from.
Drawings
Fig. 1 is a schematic structural view of the intramedullary nail for femur of the present invention.
Fig. 2 is an exploded view of the femoral intramedullary nail of the present invention.
Fig. 3 is a schematic structural view of the intramedullary main nail of the present invention.
Fig. 4 is a schematic structural view of the intramedullary main nail of the present invention.
Fig. 5 is a schematic structural view of the proximal screw of the present invention.
Fig. 6 is a schematic structural view of the proximal screw of the present invention.
Fig. 7 is a schematic structural view of the locking screw of the present invention.
Fig. 8 is a schematic structural diagram of the cortical bone screw of the present invention.
Fig. 9 is a schematic structural view of the tail cap of the present invention.
Fig. 10 is a schematic structural view of the compression screw according to the present invention.
The reference numerals are explained below:
100-intramedullary main nail, 101-first through hole, 102-second through hole, 103-third through hole, 104-first thread part, 105-second thread part, 200-proximal screw, 201-nail rod, 202-nail head, 203-fourth through hole, 300-locking screw, 301-nail rod, 302-nail head, 400-cortical screw, 401-nail rod, 402-nail head, 500-tail cap, 501-head, 502-tail, 600-compression screw, 601-head, 602-tail.
Detailed Description
The technical solution proposed by the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
An intramedullary nail for a femur, comprising: an intramedullary main nail 100, a proximal screw 200, a locking screw 300, a cortical screw 400, a tail cap 500, and a compression screw 600. The intramedullary nail 100 has a proximal end and a distal end with a split, the proximal end extending to the distal end and being disposed at an angle of 1 to 30, preferably 1 to 15. The proximal end of the intramedullary main nail 100 is irregular, the proximal end is designed to be irregular so as to effectively prevent the intramedullary main nail from rotating, the distal end of the intramedullary main nail 100 is circular, and two grooves are symmetrically formed in the side wall of the distal end of the intramedullary main nail 100.
The proximal end of the intramedullary main nail 100 is provided with a first through hole 101 matched with the proximal screw 200 and a second through hole 102 matched with the locking screw 300; the axial line of the first through hole 101 and the near end of the intramedullary main nail 100 form an included angle of 50-90 degrees, preferably 60-80 degrees; the axis of the second through hole 102 and the near end of the intramedullary main nail 100 form an included angle of 30-70 degrees, preferably 40-60 degrees; the far end of the main intramedullary nail 100 is provided with a third through hole 103 matched with the cortical bone screw 400, the third through hole 103 and the far end of the main intramedullary nail 100 form an included angle of about 90 degrees, and the third through hole 103 is in a long hole shape.
The main intramedullary nail 100 has a central through hole penetrating through the proximal end and the distal end, the central through hole of the proximal end of the main intramedullary nail 100 has a first threaded part 104 and a second threaded part 105, and the tail cap 500 and the compression screw 600 are disposed in the central through hole of the main intramedullary nail 100 from the top down. The tail cap 500 includes a head portion 501 and a tail portion 502, the head portion 501 having a semicircular pilot portion and threads for connecting the tail portion 502, and the tail portion 502 having an outer hexagonal drive portion. The compression screw 600 has a through hole penetrating through the upper and lower end faces, the compression screw 600 has a head 601 and a tail 602, the head 601 has a cylindrical compression column and an external thread connecting the tail 602, and the tail 602 has an inner hexagonal drive. The lower end of the compression screw 600 compresses the proximal screw 200, the compression screw 600 is in threaded connection with the second threaded portion 105, the tail cap 500 is in threaded connection with the first threaded portion 104, and the tail cap 500 compresses the compression screw 600.
The proximal screw 200 is of an integrated structure and has the advantages of high strength, convenience in operation and processing and the like. The proximal screw 200 comprises a shank 201 and a head 202, the proximal screw 200 has a central through hole penetrating the shank 201 and the head 202, and the shank 201 has a fourth through hole 203 engaged with the locking screw 300. The head 202 has an external thread or a screw type blade.
The locking screw 300 comprises a shank 301 and a head 302, and the shank 301 is provided with threads. The cortical bone screw 400 comprises a shank 401 and a nail head 402, wherein the shank 401 is provided with threads.
After the locking screw 300 passes through the second through hole 102, the locking screw 300 continues to pass through the fourth through hole 203, so that an approximately triangular structure is formed among the intramedullary main nail 100, the proximal screw 200 and the locking screw 300, and the proximal screw 200 is effectively prevented from being withdrawn from the first through hole 101, thereby affecting the operation effect.
The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.
Claims (10)
1. An intramedullary nail for a femur, characterized in that it comprises:
the intramedullary main nail is provided with an irregular-shaped near end and a forked far end, the intramedullary main nail is provided with a central through hole penetrating through the near end and the far end, the central through hole at the near end of the intramedullary main nail is provided with a first threaded part and a second threaded part, the near end of the intramedullary main nail is provided with a first through hole matched with a near end screw and a second through hole matched with a locking screw, the axis of the first through hole and the near end of the intramedullary main nail form an included angle of 50-90 degrees, the axis of the second through hole and the near end of the intramedullary main nail form an included angle of 30-70 degrees, and the far end of the intramedullary main nail is provided with a third through hole matched with a cortical bone screw;
the proximal screw comprises a screw rod and a screw head, the proximal screw is provided with a central through hole penetrating through the screw rod and the screw head, and the screw rod is provided with a fourth through hole matched with the locking screw;
the locking screw comprises a screw rod and a screw head, and the screw rod of the locking screw is provided with threads;
the cortical bone screw comprises a screw rod and a screw head, and the screw rod of the cortical bone screw is provided with threads;
the tail cap comprises a head part and a tail part, the head part is provided with a semicircular guide part and a thread for connecting the tail part, and the tail part is provided with an outer hexagonal driving part;
the compression screw is provided with a through hole penetrating through the upper end face and the lower end face and is provided with a head part and a tail part, the head part is provided with a cylindrical compression column and an external thread connected with the tail part, and the tail part is provided with an inner hexagonal drive.
2. The intramedullary nail of claim 1, wherein the proximal end of the intramedullary main nail extends to the distal end and is disposed at an angle of between 1 ° and 30 °.
3. The intramedullary nail of claim 2, wherein the proximal end of the intramedullary nail is disposed at an angle of 1 ° to 15 ° to the distal end.
4. The intramedullary nail of claim 1, wherein the distal end of the intramedullary main nail is rounded.
5. The intramedullary nail of claim 1, wherein the distal side wall of the intramedullary nail is symmetrically provided with two slots.
6. The intramedullary nail of claim 1, wherein the third through hole is slot-shaped.
7. The intramedullary nail of claim 1, wherein the first through hole axis is angled between 60 ° and 80 ° from the proximal end of the intramedullary nail and the second through hole axis is angled between 40 ° and 60 ° from the proximal end of the intramedullary nail.
8. The intramedullary nail of claim 1, wherein the locking screw continues to pass through the fourth through hole after passing through the second through hole such that the intramedullary main nail, the proximal screw, and the locking screw form an approximately triangular configuration therebetween.
9. The intramedullary nail of claim 1, wherein a tail cap and a compression screw are disposed in the central through hole of the intramedullary main nail from top to bottom, a lower end of the compression screw compresses the proximal screw, the compression screw is threadedly coupled to the second threaded portion of the intramedullary main nail, the tail cap is threadedly coupled to the first threaded portion of the intramedullary main nail, and the tail cap compresses the compression screw.
10. The intramedullary nail of claim 1, wherein the head has an external thread or a helical blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920301685.1U CN210019595U (en) | 2019-03-11 | 2019-03-11 | Intramedullary nail for femur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920301685.1U CN210019595U (en) | 2019-03-11 | 2019-03-11 | Intramedullary nail for femur |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210019595U true CN210019595U (en) | 2020-02-07 |
Family
ID=69354480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920301685.1U Active CN210019595U (en) | 2019-03-11 | 2019-03-11 | Intramedullary nail for femur |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210019595U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112704556A (en) * | 2020-12-22 | 2021-04-27 | 安阳市伊来达医疗器械有限公司 | Anti-sinking anti-rotation rectangular wedge-shaped intramedullary fixation device for orthopedics department |
| CN114259287A (en) * | 2021-12-24 | 2022-04-01 | 北京理贝尔生物工程研究所有限公司 | Intramedullary locking pin assembly |
-
2019
- 2019-03-11 CN CN201920301685.1U patent/CN210019595U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112704556A (en) * | 2020-12-22 | 2021-04-27 | 安阳市伊来达医疗器械有限公司 | Anti-sinking anti-rotation rectangular wedge-shaped intramedullary fixation device for orthopedics department |
| CN114259287A (en) * | 2021-12-24 | 2022-04-01 | 北京理贝尔生物工程研究所有限公司 | Intramedullary locking pin assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207949887U (en) | A kind of orthopedic internal fixation system of modified form pedicle screw stick | |
| CN201239191Y (en) | Intramedullary nail for locking fractured femur | |
| CN104546100B (en) | Dynamic compression locking plate for treatment of femoral neck fracture | |
| WO2013068088A1 (en) | Screw implant for a jaw bone having a coronal compression screw and an apical self-cutting screw | |
| CN210019595U (en) | Intramedullary nail for femur | |
| CN204379417U (en) | Universal dynamical pressing type is strengthened preventing revolving intramedullary pin | |
| CN204863440U (en) | Thighbone arc coaptation board | |
| CN205198118U (en) | Universal screw of expandable type pedicle of vertebral arch cortex bone | |
| CN205019150U (en) | Pressurization intramedullary nail | |
| CN203598035U (en) | Dynamic hip screw with movable sleeve | |
| CN110279447A (en) | A kind of Combined spiral enhanced type bone anchors | |
| CN209203377U (en) | A kind of soft tissue fixing belt line holdfast | |
| CN206792478U (en) | Bone cement screw | |
| CN209252989U (en) | A kind of soft tissue fixing belt line holdfast | |
| CN211409309U (en) | Proximal intramedullary nail of femur | |
| CN209422082U (en) | Structural system for resected femur | |
| CN209301287U (en) | A kind of orthopaedics screw internal fixing system | |
| CN213787727U (en) | Tension screw for intramedullary nail system and intramedullary nail system thereof | |
| CN206355121U (en) | A kind of intramedullary needle fixing device of novel thighbone handle prosthese and Periprosthetic fracture | |
| CN208625838U (en) | Bone cement locking bone screw for locking bone fracture plate | |
| CN111419371A (en) | Cross-engaged proximal femoral intramedullary nail | |
| CN214632302U (en) | Improved tension trabecular bone reconstruction type proximal femoral intramedullary nail | |
| CN205964141U (en) | Pressurization hollow screw | |
| CN206852655U (en) | Fractured near end of thighbone improves locking steel plate inner fixing device | |
| CN208017563U (en) | A kind of fractured near end of thighbone connector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |