CN116509525B - Bendable locking intramedullary fixing device - Google Patents
Bendable locking intramedullary fixing deviceInfo
- Publication number
- CN116509525B CN116509525B CN202310502186.XA CN202310502186A CN116509525B CN 116509525 B CN116509525 B CN 116509525B CN 202310502186 A CN202310502186 A CN 202310502186A CN 116509525 B CN116509525 B CN 116509525B
- Authority
- CN
- China
- Prior art keywords
- section
- screw
- mounting hole
- spiral
- spiral section
- 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
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary devices, e.g. pins or nails
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to the technical field of medical equipment, in particular to a bendable locking intramedullary fixing device. The device comprises a nail head, a nail rod, a tail seat, a plurality of second perforations, a flexible control wire, a cable channel and a locking piece, wherein a first spiral section is arranged at one end of the nail head, a plurality of counter bores are distributed on a spiral body of the first spiral section, the nail rod is assembled by a plurality of second spiral sections, a plurality of first perforations are distributed on the spiral body of the second spiral section, a third spiral section is arranged at one end of the tail seat, close to the nail rod, a mounting hole is formed in one end, far away from the nail rod, of the tail seat, the inner diameter of one end, close to the nail rod, of the mounting hole is smaller than the inner diameter of one end, far away from the nail rod, of the mounting hole, a plurality of adjusting channels are formed in the inner wall of the mounting hole along the circumferential direction, the locking piece is in the mounting hole of the tail seat, one section of the flexible control wire is fixed in the counter bore, the other end of the flexible control wire penetrates out of the adjusting channels after passing through the cable channel, and can be locked after bending is adjusted.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a bendable locking intramedullary fixing device.
Background
Fracture may occur in straight bones such as femur or in curved bones such as pelvic bone, and fracture fixation is required after reduction of the fracture site during fracture surgery. The manner in which a fracture is fixed is primarily affected by factors such as the fracture type, bone type, and patient health. Fracture fixation can be divided into external fixation and internal fixation, wherein the external fixation is commonly used in fracture fixation operation of pelvis, and the fixation of fracture part is realized by connecting long screws inserted into ilium with frame outside human body. Examples of internal fixation are mainly intramedullary nail fixation by intramedullary implantation and nail plate fixation across the fracture site. In the current minimally invasive reduction fixation operation, the internal fixation mode has more obvious effect.
The fixation operation of implanting intramedullary nails into the intramedullary cavity is popular in straight bones such as femur and tibia, and the stronger mechanical structure can well resist bending and shearing force, so that patients can leave the hospital in a short time. However, the bending nature of the bending bone, such as the pelvic bone, limits the mechanical strength of the straight intramedullary nail in the curved intramedullary cavity, and may even lead to penetration of the screw through the bone and damage to soft tissue. Therefore, there is a strong need for an intramedullary fixation device with bendable properties that can flexibly move in the intramedullary cavity of a bent bone while maintaining good mechanical strength of the intramedullary nail and achieve a stable fixation after locking of the device.
Disclosure of Invention
The invention aims to provide a bendable locking intramedullary fixing device, which overcomes the defects of the prior art, can flexibly move in the intramedullary cavity of a bent bone while maintaining good mechanical strength of the intramedullary nail, and achieves the effect of stable fixation after the device is locked.
The technical scheme adopted for solving the technical problems is as follows:
A bendable locked intramedullary fixation device comprising:
The screw comprises a screw head, wherein one end of the screw head is provided with a first screw section, the first screw section is at least provided with two layers of screws, a certain gap exists between every two adjacent layers of screws, so that the whole structure is bent and deformed in a small angle, and a plurality of counter bores are distributed on the screws of the first screw section;
The screw rod is formed by assembling a plurality of second screw sections, end sections of two adjacent second screw sections are contacted, one end section of the second screw section close to the screw head is contacted with the end section of the first screw section of the screw head, a plurality of first perforations are distributed on the screw body of the second screw section, and the second screw section is also provided with at least two layers of screw bodies;
The tail seat, one end of the tail seat close to the nail rod is provided with a third spiral section, the end section of the third spiral section is contacted with the end section of the second spiral section close to the third spiral section, a plurality of second perforations are distributed on the spiral body of the third spiral section, one end of the tail seat far away from the nail rod is provided with a mounting hole, the inner diameter of one end of the mounting hole close to the nail rod is smaller than the inner diameter of one end far away from the nail rod, the inner wall of the mounting hole is provided with a plurality of adjusting channels along the circumferential direction, and one end of the mounting hole far away from the nail rod is provided with threads;
The locking piece is in threaded connection with the mounting hole of the tailstock;
After the nail head, the nail rod and the tailstock are assembled, the counter bore, the first perforation and the second perforation form a plurality of cable channels, the positions of the cable channels are in one-to-one correspondence with the positions of the adjusting channels, the number of the flexible cables corresponds to the number of the cable channels, one section of the flexible cable is fixed in the counter bore, and the other end of the flexible cable penetrates through the cable channels and then penetrates out of the adjusting channels;
the locking piece is located first spiral section, second spiral section and second spiral section can finely tune crookedness when the great one end of internal diameter of mounting hole, and flexible cable is fixed by the extrusion when the less one end of internal diameter of locking piece entering mounting hole, and the relative position of first spiral section, second spiral section and third spiral section is fixed.
Furthermore, the outer wall of the nail head is provided with a conical thread and a self-tapping groove, the structure of the nail head is the same as that of a traditional self-tapping conical head screw, when the intramedullary fixing device is rotationally pushed in an intramedullary channel, the structure of the conical thread can ensure that the position of the device in a intramedullary cavity is firmer and more stable, and falling and position dislocation are avoided, and the nail head is axially provided with a guide wire through hole along the axial direction of the nail head, so that a movable channel is provided for a guide wire, and the intramedullary fixing device is ensured not to deviate when being pushed in along a guide wire path.
Further, one end of the tailstock, which is far away from the nail rod, is provided with a hexagonal groove, and one end of the locking block, which is far away from the nail rod, is also provided with a hexagonal groove.
Further, the cable channels are provided with 4.
Further, one end of the locking piece, which is close to the nail rod, is of an arc surface structure, so that the flexible cable is more conveniently extruded to realize locking and fixing of the device, and meanwhile unnecessary damage to the flexible cable can be avoided.
According to the intramedullary fixing device capable of being flexibly locked, when the flexible cables are in a relaxed state, the four flexible cables can slide along the bending of the device in the cable channel and the adjusting channel at will, and when the intramedullary fixing device capable of being flexibly locked moves to a proper position in a intramedullary cavity, locking pieces are placed in the mounting holes of the tailstock. Corresponding hexagonal wrenches are respectively arranged on the hexagonal grooves of the tailstock and the locking piece, the tailstock is fixed to rotate the locking piece by utilizing the antagonism of the tailstock and the locking piece, the locking piece slides towards the inside of the mounting hole when rotating under the meshing action of internal and external threads, and when the locking piece moves to the part with smaller inner diameter of the mounting hole, the arc-shaped side wall surface at the front end of the locking piece is used for extruding the flexible cable to finish locking and fixing of the device.
Compared with the prior art, the bendable locking intramedullary fixing device has the advantages that the bendable locking intramedullary fixing device is suitable for fracture fixation of pelvis bending bones and limb long bones, a minimally invasive surgery treatment scheme capable of being used for intramedullary fixation is provided for bending bone fracture, compared with the traditional external fixation mode for treating pelvis fracture and other bending bones, the intramedullary fixing device can achieve the operation effect more simply and conveniently, save operation time, fully exert the advantages of small trauma and quick recovery of orthopaedics minimally invasive surgery, can be inserted into an internal intramedullary cavity in a flexible state and accords with a bending path, can support stretching and vertical shearing stress required by fixing fracture parts in a rigid state, and can minimize or eliminate mechanical fixation problems of pelvis and other bending bones during internal fixation surgery by using the bendable locking intramedullary fixing device capable of being switched between the flexible state and the rigid state.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the nail head of the present invention;
FIG. 3 is a schematic view of another angular configuration of the stud of the present invention;
FIG. 4 is a schematic cross-sectional view of the structure of the stud of the present invention;
FIG. 5 is a schematic view of the structure of a second thread segment according to the present invention;
FIG. 6 is a schematic view of the structure of the present invention after a plurality of second thread segments are connected;
FIG. 7 is a cross-sectional view of FIG. 6 in accordance with the present invention;
FIG. 8 is a schematic view of the tailstock of the present invention;
FIG. 9 is a schematic view of another angular configuration of the tailstock of the present invention;
FIG. 10 is a cross-sectional view of the tailstock of the present invention;
FIG. 11 is a schematic view of the structure of the locking member of the present invention;
FIG. 12 is a schematic view showing the structure of the locking member of the present invention in a state of being retracted into the flexible cable;
the flexible cable comprises a 1-head, a 101 first spiral section, a 102 counter bore, 103 conical threads, 104 self-tapping grooves, 105 guide wire through holes, 2 screw rods, 201 second spiral sections, 202 first perforations, 3 tailstocks, 301 third spiral sections, 302 second perforations, 303 mounting holes, 304 adjusting channels, 4 locking pieces, 401 cambered surface structures and 5 flexible cables.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the embodiment shown in fig. 1-12, a bendable locked intramedullary fixation device includes:
the novel screw comprises a screw head 1, wherein one end of the screw head 1 is provided with a first screw section 101, the first screw section 101 is provided with at least two layers of screws, a certain gap is reserved between every two adjacent layers of screws, so that the whole structure is bent and deformed in a small angle, and a plurality of counter bores 102 are distributed on the screws of the first screw section 101;
The nail rod 2 is formed by assembling a plurality of second spiral sections 201, end sections of two adjacent second spiral sections 201 are contacted, one end section of the second spiral section 201 close to the nail head 1 is contacted with the end section of the first spiral section 101 of the nail head 1, a plurality of first perforations 202 are distributed on a spiral body of the second spiral section 201, and the second spiral section 201 is also provided with at least two layers of spiral bodies;
The tail seat 3, one end of the tail seat 3 close to the nail rod 2 is provided with a third spiral section 301, an end section of the third spiral section 301 is contacted with an end section of a second spiral section 201 close to the third spiral section 301, a plurality of second perforations 302 are distributed on a spiral body of the third spiral section 301, one end of the tail seat 3 far away from the nail rod 2 is provided with a mounting hole 303, the inner diameter of one end of the mounting hole 303 close to the nail rod 2 is smaller than the inner diameter of one end far away from the nail rod 2, a plurality of adjusting channels 304 are arranged on the inner wall of the mounting hole 303 along the circumferential direction, and one end of the mounting hole 303 far away from the nail rod 2 is provided with threads 305;
A locking piece 4, wherein the locking piece 4 is in threaded connection with the mounting hole 303 of the tailstock 3;
After the nail head 1, the nail rod 2 and the tailstock 3 are assembled, the counter bore 102, the first perforation 202 and the second perforation 302 form a plurality of cable channels, the positions of the cable channels are in one-to-one correspondence with the positions of the adjusting channels 304, the number of the flexible cables 5 corresponds to that of the cable channels, one section of the flexible cables 5 is fixed in the counter bore 102, and the other end of the flexible cables 5 penetrates through the cable channels and then penetrates out of the adjusting channels 304;
The first spiral section 101, the second spiral section 201 and the second spiral section 201 can be finely adjusted in curvature when the locking piece 4 is located at one end with a larger inner diameter of the mounting hole 303, the flexible cable 5 is extruded and fixed when the locking piece 4 enters the one end with a smaller inner diameter of the mounting hole 303, and the relative positions of the first spiral section 101, the second spiral section 201 and the third spiral section 301 are fixed.
In this embodiment, the outer wall of the nail head 1 is provided with a tapered thread 103 and a self-tapping groove 104, the structure of which is the same as that of a conventional self-tapping taper head screw, when the intramedullary fixing device is rotationally pushed in the intramedullary canal, the tapered thread 103 can ensure that the position of the device in the intramedullary canal is more stable and avoid falling off and dislocation, and the nail head 1 is provided with a guide wire through hole 105 along the axial direction thereof, which is used for providing a movable channel for a guide wire and ensuring that the intramedullary fixing device is not deviated when being pushed along a guide wire path.
In this embodiment, the end of tailstock 3 that keeps away from nail pole 2 is provided with the hexagonal recess, the one end of retaining block that keeps away from nail pole 2 also is provided with the hexagonal recess.
In this embodiment, 4 cable channels are provided.
In this embodiment, the end of the locking member 4 near the pin 2 is a cambered surface structure 401, which is more convenient for extruding the flexible cable 5 to realize locking and fixing of the device, and meanwhile, unnecessary damage to the flexible cable 5 can be avoided.
In this embodiment, in a flexible and relaxed state of the intramedullary fixation device, a plurality of first thread segments, second thread segments and third thread segments in the middle section of the device have small gaps respectively and between the first thread segments, the second thread segments and the third thread segments, the gaps can be freely bent and changed within a certain angle range by stretching and bending, after the angle position of the intramedullary fixation device is adjusted, the locking piece 4 of the tailstock 3 is adjusted, thus realizing the locking and fixation of the device, when in use, after fracture reduction, a guide wire is utilized to pass through the fracture position in the intramedullary cavity of a bent bone, an intramedullary channel is established along the guide wire path, finally the intramedullary fixation device is pushed into the intramedullary channel along the guide wire path, and after the intramedullary fixation is achieved to a proper position, the intramedullary fixation is locked and performed.
The foregoing embodiments are merely examples of the present invention, and the scope of the present invention includes, but is not limited to, the forms and styles of the foregoing embodiments, and any suitable changes or modifications made by those skilled in the art, which are consistent with the claims of the present invention, shall fall within the scope of the present invention.
Claims (5)
1. A bendable locked intramedullary fixation device, comprising:
the screw comprises a screw head, wherein one end of the screw head is provided with a first screw section, and a plurality of counter bores are distributed on a screw body of the first screw section;
The screw rod is formed by assembling a plurality of second screw sections, end section surfaces of two adjacent second screw sections are contacted, one end section surface of the second screw section close to the screw head is contacted with the end section surface of the first screw section of the screw head, and a plurality of first perforations are distributed on the screw body of the second screw section;
The tail seat, one end of the tail seat close to the nail rod is provided with a third spiral section, the end section of the third spiral section is contacted with the end section of the second spiral section close to the third spiral section, a plurality of second perforations are distributed on the spiral body of the third spiral section, one end of the tail seat far away from the nail rod is provided with a mounting hole, the inner diameter of one end of the mounting hole close to the nail rod is smaller than the inner diameter of one end far away from the nail rod, the inner wall of the mounting hole is provided with a plurality of adjusting channels along the circumferential direction, and one end of the mounting hole far away from the nail rod is provided with threads;
The locking piece is in threaded connection with the mounting hole of the tailstock;
After the nail head, the nail rod and the tailstock are assembled, the counter bore, the first perforation and the second perforation form a plurality of cable channels, the positions of the cable channels are in one-to-one correspondence with the positions of the adjusting channels, the number of the flexible control wires corresponds to the number of the cable channels, one section of the flexible control wires is fixed in the counter bore, and the other end of the flexible control wires penetrates through the cable channels and then penetrates out of the adjusting channels;
The locking piece is positioned at one end with a larger inner diameter of the mounting hole, the first spiral section, the second spiral section and the second spiral section can be used for fine adjustment of curvature, the flexible control line is extruded and fixed when the locking piece enters the one end with a smaller inner diameter of the mounting hole, and the relative positions of the first spiral section, the second spiral section and the third spiral section are fixed;
The outer wall of the nail head is provided with a conical thread and a self-tapping groove;
The pin head is provided with a guide wire through hole along the axial direction of the pin head.
2. The bendable locked intramedullary fixation device of claim 1, wherein the end of the tailstock distal from the shank is provided with a hexagonal recess, and the end of the locking block distal from the shank is also provided with a hexagonal recess.
3. The bendable locked intramedullary fixation device of claim 1, wherein the cable channel is provided with 4 cable channels.
4. The bendable locked intramedullary fixation device of claim 1, wherein the locking member has a cambered surface at an end thereof adjacent to the shank.
5. The bendable locked intramedullary fixation device of claim 1, wherein the flexible control wire is a flexible cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310502186.XA CN116509525B (en) | 2023-05-06 | 2023-05-06 | Bendable locking intramedullary fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310502186.XA CN116509525B (en) | 2023-05-06 | 2023-05-06 | Bendable locking intramedullary fixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116509525A CN116509525A (en) | 2023-08-01 |
| CN116509525B true CN116509525B (en) | 2025-11-21 |
Family
ID=87400770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310502186.XA Active CN116509525B (en) | 2023-05-06 | 2023-05-06 | Bendable locking intramedullary fixing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116509525B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN220477643U (en) * | 2023-05-06 | 2024-02-13 | 山东威高骨科材料股份有限公司 | Bendable locking intramedullary fixing device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636119A (en) * | 2007-03-22 | 2010-01-27 | 诺瓦利恩整形公司 | Segmented intramedullary structure |
| WO2015134750A1 (en) * | 2014-03-06 | 2015-09-11 | University Of British Columbia | Shape adaptable intramedullary fixation device |
| US11832856B2 (en) * | 2018-10-17 | 2023-12-05 | The University Of British Columbia | Bone-fixation device and system |
| US11844553B2 (en) * | 2021-09-13 | 2023-12-19 | DePuy Synthes Products, Inc. | Intramedullary bone fixation device for ribs |
| CN113974808B (en) * | 2021-11-16 | 2024-11-08 | 武汉拓扑转化医学研究中心有限公司 | A bendable intramedullary nail and method of using the same |
-
2023
- 2023-05-06 CN CN202310502186.XA patent/CN116509525B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN220477643U (en) * | 2023-05-06 | 2024-02-13 | 山东威高骨科材料股份有限公司 | Bendable locking intramedullary fixing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116509525A (en) | 2023-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11653962B2 (en) | Apparatus for immobilization and fusion of a synovial joint | |
| AU2017213594B2 (en) | Hammertoe implant and instrument | |
| CA2057957C (en) | Bone screw | |
| CA2594179C (en) | Intramedullary nail | |
| US9814501B2 (en) | Cannulated telescopic femoral neck screw device and related fixation method | |
| US6648893B2 (en) | Facet fixation devices | |
| CN104010594B (en) | Surgical implants for percutaneous lengthening of pedicles to correct spinal stenosis | |
| US8491584B1 (en) | Intramedullary nail system with tang fixation | |
| US20040204712A1 (en) | Bone fixation plates | |
| US9622798B2 (en) | Intramedullary compression rod | |
| CN209966532U (en) | Pressure internal fixer capable of making two ends of fracture position between femur neck and tuberosity tightly combined | |
| CN220477643U (en) | Bendable locking intramedullary fixing device | |
| US20200253655A1 (en) | Fixation Device And Method Of Using The Same | |
| JP2023521716A (en) | Bone fixation implants with optimized expansion | |
| CN116509525B (en) | Bendable locking intramedullary fixing device | |
| US20230270466A1 (en) | Bone fixation system and device | |
| CN222693506U (en) | Multipurpose osteoporosis anchor system | |
| US10918370B2 (en) | Support device mountable to the pelvic bone | |
| US20150305779A1 (en) | Spring and device for stabilizing human or animal bone | |
| CN110897700B (en) | A special-shaped proximal femoral block | |
| CN219109696U (en) | Elastic internal fixing device | |
| CN115969583A (en) | Support with telescopic machanism | |
| PL226930B1 (en) | Intramedullary expandable nail, for lengthening of bones, with piezoelectric mechanism | |
| NZ555699A (en) | Intramedullary nail |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |