CN108210045B - Proximal femur intramedullary pin matched tension belt system - Google Patents
Proximal femur intramedullary pin matched tension belt system Download PDFInfo
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- CN108210045B CN108210045B CN201810000937.7A CN201810000937A CN108210045B CN 108210045 B CN108210045 B CN 108210045B CN 201810000937 A CN201810000937 A CN 201810000937A CN 108210045 B CN108210045 B CN 108210045B
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- tension
- far
- lantern ring
- proximal
- end fixing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
Abstract
The invention provides a femur proximal intramedullary needle matched tension band system, which relates to the technical field of medical equipment and solves the technical problem that an intramedullary needle is concentrated in stress and easy to break; the distal end lantern ring is detachably arranged at the lower part of the intramedullary nail; the tension belt is a closed annular belt, and two ends of the tension belt are respectively connected with the near-end lantern ring and the far-end lantern ring; the lock is attached to a tension band located between the distal collar and the proximal collar. According to the invention, the tension belt system is manufactured by the strands of titanium cables and has a larger tension resisting capability, so that the strength of the intramedullary needle is indirectly improved, the service life of the intramedullary needle is prolonged, and the fracture fixation failure risk is reduced.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a tension band system matched with a proximal femur intramedullary needle.
Background
Intramedullary pin fixation is often used for long bone (such as femur, humerus, ulna, tibia, radius, etc.) shaft fractures. The advantages are that: the intramedullary pin is firm and firm, can be fixed with little or no external fixation after operation, and is beneficial to the early movement and exercise of injured limbs; the skin incision is small, the periosteum stripping range is limited, and the damage is small; the intramedullary needle is long and has edges and corners with different shapes, and is embedded into the medullary cavity, so that firm internal fixation can be achieved, and the occurrence of rotation, lateral movement and angular displacement can be avoided.
The applicant has found that the prior art has at least the following technical problems:
the treatment of the condition of incomplete bone cortex outside the proximal femoral fracture, such as trans-tuberosity fracture, greater trochanter lateral wall comminuted fracture and the like; the proximal femur is curved in shape, the bending external moment is large, the curved inner side is a pressure side, the curved outer side shows tension, when the cortical bone of the outer side of the proximal femur is incomplete, the part resisting the tension of the outer side is lost, the tension stress is completely resisted by the intramedullary nail of the implant, the stress can be concentrated around the nail hole of the intramedullary nail, and the fracture of the intramedullary nail is easily caused.
Disclosure of Invention
The invention aims to provide a tension band system matched with a proximal intramedullary pin of a femur, which aims to solve the technical problem that the intramedullary pin is easy to break under stress in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a femur proximal intramedullary needle matching tension band system, which comprises a distal end lantern ring, a proximal end lantern ring, a tension band and a lock catch, wherein:
the proximal end lantern ring is detachably arranged at the top of the intramedullary nail;
the distal end lantern ring is detachably arranged at the lower part of the intramedullary nail;
the tension band is a closed annular band, and two ends of the tension band are respectively connected with the near-end lantern ring and the far-end lantern ring;
the latch is connected to the tension band between the distal collar and the proximal collar.
The design idea of the device is to rebuild the tension-resistant structure outside the intramedullary needle, so that the stress transfer concentrated on the intramedullary needle is concentrated on the tension band system, and the tension band system is made of a plurality of strands of titanium cables and has larger tension resistance, thereby indirectly improving the strength of the intramedullary needle, prolonging the service life of the intramedullary needle and reducing the fracture fixation failure risk.
As a further improvement of the present invention, the tension band includes a first edge and a second edge, and the lock is connected to both the first edge and the second edge.
The locking buckle is used for pressing or loosening the tension band, so that the tension balance of the first edge and the second edge can be adjusted to transfer the tension stress on the intramedullary nail to the tension band as much as possible.
As a further improvement of the invention, the tension belt is made of titanium cables. The titanium cable is a multi-strand cable.
Because the titanium material has the best biocompatibility, the titanium cable is made of the titanium cable, and the titanium cable is a multi-strand cable and has good tensile capacity.
As a further improvement of the present invention, the distal end collar includes a distal end fixing spacer and a distal end fixing tube disposed on the distal end fixing spacer, the distal end fixing tube is of a curved structure, the tension band is disposed in the distal end fixing tube in a penetrating manner, an opening for a locking nail to pass through is disposed on the distal end fixing spacer, and the distal end fixing spacer is connected with the intramedullary nail through the locking nail.
The far-end fixing tube is arranged on the far-end fixing gasket in parallel, and the two port positions of the far-end fixing tube are arranged towards the direction of the near-end lantern ring, so that the two ends of the tension band cannot form dead angles to be bent after the tension band passes through the far-end fixing tube smoothly.
As a further improvement of the invention, the far-end fixed tube is of a semicircular annular structure.
The semi-circular far-end fixing pipe is convenient for the arc-shaped oversteering of the tension belt, and the bending dead angle can not be formed.
As a further improvement of the invention, the proximal end lantern ring comprises a proximal end fixing gasket and a proximal end fixing tube arranged on the proximal end fixing gasket, the proximal end fixing tube is of a curved structure, the tension band is arranged in the proximal end fixing tube in a penetrating manner, an opening for a tail cap to pass through is formed in the proximal end fixing gasket, and the proximal end fixing gasket is connected with the intramedullary needle through the tail cap.
The tail cap can be dismantled and set up at intramedullary nail top, and the tail cap diameter is less than intramedullary nail top diameter, and near-end fixed gasket passes the tail cap after, connects at the intramedullary nail top through the tail cap, and the tail cap has the tailstock, and the tailstock diameter is greater than the tail cap diameter to it is fixed with near-end fixed gasket through tailstock and intramedullary nail top, and the fixed pipe of near-end is the arc, makes the tension band pass the fixed pipe of near-end smoothly.
As a further improvement of the invention, the proximal fixing tube is of a semicircular annular structure.
As a further improvement of the present invention, the lock catch includes a housing, a fixing groove and a compression screw, the housing is of a hollow structure, the fixing groove is disposed in the housing, the tension band is laid in the fixing groove, a threaded through hole is disposed at the top of the housing, the compression screw is screwed on the threaded through hole, the end of the compression screw is contactably connected with the tension band, the number of the fixing groove and the number of the compression screw are two, the first edge and the second edge are respectively laid in the two fixing grooves, and the two compression screws are disposed in a one-to-one correspondence with the two fixing grooves.
The lock catch is used for locking or loosening the tension belt, the tension belt is of a closed-loop structure and comprises a first edge and a second edge, the lock catch respectively locks or loosens the first edge and the second edge, when the tension belt needs to be locked, the compression screw is screwed in, the compression screw gradually penetrates into the shell through the threaded through hole and finally compresses the tension belt, when the tension belt needs to be loosened, the compression screw only needs to be rotated reversely, the tail end of the compression screw is separated from the locking position, and therefore the two edges of the tension belt can be adjusted to enable the tension to be balanced.
As a further improvement of the invention, the width of the fixing groove is larger than the diameter of the tension band, and the two compression screws are arranged in a staggered mode.
As a further improvement of the invention, the distal end lantern ring, the proximal end lantern ring and the lock catch are all made of titanium materials.
The invention has the beneficial effects that: the design idea of the device is to rebuild the tension-resistant structure outside the intramedullary needle, so that the stress transfer concentrated on the intramedullary needle is concentrated on the tension band system, and the tension band system is made of a plurality of strands of titanium cables and has larger tension-resistant capability, thereby indirectly improving the strength of the intramedullary needle, prolonging the service life of the intramedullary needle and reducing the failure risk of fracture fixation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of a proximal femoral intramedullary pin tension strap system of the present invention;
FIG. 2 is an exploded view of the distal collar of the femoral proximal intramedullary pin mating tension band system of the present invention;
FIG. 3 is a schematic view of the proximal intramedullary pin with the distal collar of the tension strap system of the present invention attached thereto;
FIG. 4 is an exploded view of the proximal collar of the femoral proximal intramedullary pin mating tension band system of the present invention;
FIG. 5 is a schematic view of the proximal collar of the femoral proximal intramedullary pin tension band system of the present invention in an attached configuration;
FIG. 6 is a schematic perspective view of a locking buckle of the tension band system for proximal intramedullary nail of femur according to the present invention;
FIG. 7 is a top view of a latch in the femoral proximal intramedullary pin mating tension strap system of the present invention;
FIG. 8 is a top view of the proximal collar of the femoral proximal intramedullary pin mating tension strap system of the present invention.
FIG. 1, distal collar; 11. a distal fixation spacer; 12. a distal fixation tube; 2. a proximal collar; 21. a proximal fixation spacer; 22. a proximal end fixation tube; 3. a tension band; 31. a first side; 32. a second edge; 4. locking; 41. a housing; 42. fixing grooves; 43. a compression screw; 100. an intramedullary pin; 200. locking nails; 300. a tail cap; 400. and (4) a tail seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
As shown in fig. 1, the invention provides a femur proximal intramedullary nail matching tension belt system, which comprises a distal end collar 1, a proximal end collar 2, a tension belt 3 and a lock catch 4, wherein the proximal end collar 2 is detachably arranged at the top of an intramedullary nail 100; the distal end lantern ring 1 is detachably arranged at the lower part of the intramedullary nail 100; the tension band 3 is a closed annular band, and two ends of the tension band 3 are respectively connected with the near-end lantern ring 2 and the far-end lantern ring 1; the lock catch 4 is attached to the tension band 3 between the distal collar 1 and the proximal collar 2. The intramedullary needle 100 is connected in the marrow, the tension band system is a tension resisting structure for reconstructing the outer side of the intramedullary needle 100, the stress transfer concentrated on the intramedullary needle 100 is concentrated on the tension band system, and the tension band system is made of a plurality of strands of titanium cables and has larger tension resisting capacity, thereby indirectly improving the strength of the intramedullary needle 100, prolonging the service life of the intramedullary needle 100 and reducing the fracture fixation failure risk.
As shown in fig. 2, the tension band 3 includes a first edge 31 and a second edge 32, and the lock catch 4 is connected to both the first edge 31 and the second edge 32. The lock catch 4 is used to press or release the tension band 3 so that the tension balance of the first edge 31 and the second edge 32 can be adjusted to transfer as much as possible the tensile stress to which the intramedullary needle 100 is subjected to the tension band 3. When in use, the stress conditions of the first edge 31 and the second edge 32 can be balanced by adjusting the tightness and looseness of the lock catches 4, so that the balance and stability of the tension belt system are ensured.
As shown in fig. 3, in order to ensure the strength and biocompatibility of the tension band 3, the tension band 3 is made of titanium cable, and in particular, the titanium cable is a multi-strand cable. Because the titanium material has the best biocompatibility, the titanium cable is made of the titanium cable, and the titanium cable is a multi-strand cable and has good tensile capacity.
As shown in fig. 2-3, the distal end collar 1 includes a distal end fixing spacer 11 and a distal end fixing tube 12 disposed on the distal end fixing spacer 11, the distal end fixing tube 12 is a curved structure, the tension band 3 is disposed through the distal end fixing tube 12, an opening for the locking nail 200 to pass through is disposed on the distal end fixing spacer 11, and the distal end fixing spacer 11 is connected to the intramedullary needle 100 through the locking nail 200. The far-end fixing tube 12 is arranged on the far-end fixing gasket 11 in parallel, and the two port positions of the far-end fixing tube 12 are arranged towards the direction of the near-end lantern ring 2, so that after the tension band 3 smoothly passes through the far-end fixing tube 12, dead angles at the two ends of the tension band 3 cannot be formed and bent.
Preferably, the distal holding tube 12 is of a semi-circular configuration. The semicircular annular far-end fixing tube 12 is convenient for the arc-shaped over-steering of the tension belt 3, and no bending dead angle is formed.
As shown in fig. 4-5, the proximal collar 2 includes a proximal fixing pad 21 and a proximal fixing tube 22 disposed on the proximal fixing pad 21, the proximal fixing tube 22 is a curved structure, the tension band 3 is disposed in the proximal fixing tube 22, the proximal fixing pad 21 is provided with an opening for the tail cap 300 to pass through, and the proximal fixing pad 21 is connected to the intramedullary needle 100 through the tail cap 300. The tail cap 300 is detachably arranged at the top of the intramedullary needle 100, the diameter of the tail cap 300 is smaller than that of the top of the intramedullary needle 100, the proximal fixing gasket 21 is connected to the top of the intramedullary needle 100 through the tail cap 300 after passing through the tail cap 300, the tail cap 300 is provided with a tail seat 400, the diameter of the tail seat 400 is larger than that of the tail cap 300, so that the proximal fixing gasket 21 is fixed through the tail seat 400 and the top of the intramedullary needle 100, and the proximal fixing tube 22 is arc-shaped, so that the tension band 3 smoothly passes through the proximal fixing tube 22.
As shown in fig. 8, the proximal fixing tube 22 preferably has a semicircular ring-shaped structure.
As shown in fig. 6 to 7, the lock catch 4 includes a housing 41, a fixing groove 42 and a pressing screw 43, the housing 41 is a hollow structure, the fixing groove 42 is disposed in the housing 41, the tension band 3 is laid in the fixing groove 42, a threaded through hole is disposed at the top of the housing 41, the pressing screw 43 is screwed on the threaded through hole, the end of the pressing screw 43 is contactably connected with the tension band 3, the number of the fixing groove 42 and the number of the pressing screw 43 are two, the first edge 31 and the second edge 32 are respectively laid in the two fixing grooves 42, and the two pressing screws 43 are disposed in a one-to-one correspondence with the two fixing grooves. The lock catch 4 is used for locking or loosening the tension belt 3, the tension belt 3 is of a closed loop structure and comprises a first side 31 and a second side 32, the lock catch 4 respectively locks or loosens the first side 31 and the second side 32, when the tension belt 3 needs to be locked, the compression screw 43 is screwed in, the compression screw 43 gradually penetrates into the shell 41 through the threaded through hole, and finally the tension belt 3 is compressed, when the tension belt 3 needs to be loosened, the compression screw 43 only needs to be rotated reversely, the tail end of the compression screw 43 is separated from the locking position, and therefore force on two sides of the tension belt 3 can be adjusted, and tension is balanced.
Preferably, the width of the fixing groove 42 is greater than the diameter of the tension band 3, so that the tension band 3 can move along the length direction of the fixing groove 42, the two compression screws 43 are arranged in a staggered manner, the size of the lock catch 4 can be saved, the investment cost is reduced, and the interference between the two compression screws 43 is also avoided.
As an alternative embodiment, the distal end lantern ring 1, the proximal end lantern ring 2 and the lock catch 4 are made of titanium.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (5)
1. A proximal femoral intramedullary pin mating tension strap system, characterized in that: including distal end lantern ring (1), near-end lantern ring (2), tension band (3) and hasp (4), wherein: the proximal end lantern ring (2) is detachably arranged at the top of the intramedullary nail (100);
the far-end lantern ring (1) is detachably arranged at the lower part of the intramedullary nail (100);
the tension band (3) is a closed annular band, and two ends of the tension band (3) are respectively connected with the near-end lantern ring (2) and the far-end lantern ring (1);
the lock catch (4) is connected to the tension band (3) between the distal collar (1) and the proximal collar (2);
the tension belt (3) comprises a first edge (31) and a second edge (32), and the lock catch (4) is connected with the first edge (31) and the second edge (32);
the far-end lantern ring (1) comprises a far-end fixing gasket (11) and a far-end fixing pipe (12) arranged on the far-end fixing gasket (11), the far-end fixing pipe (12) is of a bent arc structure, the tension belt (3) penetrates through the far-end fixing pipe (12), an opening for a locking nail (200) to penetrate through is formed in the far-end fixing gasket (11), and the far-end fixing gasket (11) is connected with the intramedullary needle (100) through the locking nail (200);
the near-end lantern ring (2) comprises a near-end fixing gasket (21) and a near-end fixing tube (22) arranged on the near-end fixing gasket (21), the near-end fixing tube (22) is of a bent arc structure, the tension band (3) penetrates through the near-end fixing tube (22), an opening for a tail cap (300) to penetrate through is formed in the near-end fixing gasket (21), and the near-end fixing gasket (21) is connected with the intramedullary needle (100) through the tail cap (300);
the lock catch (4) comprises a shell (41), fixing grooves (42) and compression screws (43), the shell (41) is of a hollow structure, the fixing grooves (42) are arranged in the shell (41), the tension belt (3) is laid in the fixing grooves (42), a threaded through hole is formed in the top of the shell (41), the compression screws (43) are screwed on the threaded through hole, the tail ends of the compression screws (43) are in contact connection with the tension belt (3), the number of the fixing grooves (42) and the number of the compression screws (43) are two, the first edge (31) and the second edge (32) are respectively laid in the two fixing grooves (42), and the two compression screws (43) are arranged corresponding to the two fixing grooves (42) one by one;
the width of the fixing groove (42) is larger than the diameter of the tension band (3), and the two compression screws (43) are arranged in a staggered mode.
2. The femoral proximal intramedullary pin mating tension strap system of claim 1, wherein: the tension belt (3) is made of titanium cables.
3. The femoral proximal intramedullary pin mating tension strap system of claim 1, wherein: the far-end fixing tube (12) is of a semicircular annular structure.
4. The femoral proximal intramedullary pin mating tension strap system of claim 1, wherein: the proximal end fixing tube (22) is of a semicircular annular structure.
5. The femoral proximal intramedullary pin mating tension strap system of claim 1, wherein: the far-end lantern ring (1), the near-end lantern ring (2) and the lock catch (4) are all made of titanium materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810000937.7A CN108210045B (en) | 2018-01-03 | 2018-01-03 | Proximal femur intramedullary pin matched tension belt system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810000937.7A CN108210045B (en) | 2018-01-03 | 2018-01-03 | Proximal femur intramedullary pin matched tension belt system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108210045A CN108210045A (en) | 2018-06-29 |
| CN108210045B true CN108210045B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810000937.7A Active CN108210045B (en) | 2018-01-03 | 2018-01-03 | Proximal femur intramedullary pin matched tension belt system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1272116B1 (en) * | 2000-04-10 | 2004-09-29 | SYNTHES AG Chur | Osteosynthetic anchoring element |
| CN2857861Y (en) * | 2005-11-11 | 2007-01-17 | 杜学平 | Steel wire tension belt with lock |
| CN201719364U (en) * | 2010-06-10 | 2011-01-26 | 贾斌 | Greater trochanter fixed-type femoral nail |
| CN201743760U (en) * | 2010-08-31 | 2011-02-16 | 中国人民解放军第二军医大学 | Belt type absorbable fracture fixation strap |
| FR2965712B1 (en) * | 2010-10-12 | 2012-11-09 | Cie Financiere Et Medicale | EQUIPMENT FOR REPAIRING A FRACTURED SHOULDER JOINT |
| CN106073877A (en) * | 2016-07-14 | 2016-11-09 | 闻泰医疗科技（上海）有限公司 | A kind of near end of thighbone Medullary fixation device |
| CN106264828A (en) * | 2016-08-29 | 2017-01-04 | 河北医科大学第三医院 | A kind of suitable type noinvasive bone distraction device |
-
2018
- 2018-01-03 CN CN201810000937.7A patent/CN108210045B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1272116B1 (en) * | 2000-04-10 | 2004-09-29 | SYNTHES AG Chur | Osteosynthetic anchoring element |
| CN2857861Y (en) * | 2005-11-11 | 2007-01-17 | 杜学平 | Steel wire tension belt with lock |
| CN201719364U (en) * | 2010-06-10 | 2011-01-26 | 贾斌 | Greater trochanter fixed-type femoral nail |
| CN201743760U (en) * | 2010-08-31 | 2011-02-16 | 中国人民解放军第二军医大学 | Belt type absorbable fracture fixation strap |
| FR2965712B1 (en) * | 2010-10-12 | 2012-11-09 | Cie Financiere Et Medicale | EQUIPMENT FOR REPAIRING A FRACTURED SHOULDER JOINT |
| CN106073877A (en) * | 2016-07-14 | 2016-11-09 | 闻泰医疗科技（上海）有限公司 | A kind of near end of thighbone Medullary fixation device |
| CN106264828A (en) * | 2016-08-29 | 2017-01-04 | 河北医科大学第三医院 | A kind of suitable type noinvasive bone distraction device |
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| CN108210045A (en) | 2018-06-29 |
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