CN208958298U - A kind of flexible intramedullary nail - Google Patents
A kind of flexible intramedullary nail Download PDFInfo
- Publication number
- CN208958298U CN208958298U CN201820719557.4U CN201820719557U CN208958298U CN 208958298 U CN208958298 U CN 208958298U CN 201820719557 U CN201820719557 U CN 201820719557U CN 208958298 U CN208958298 U CN 208958298U
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- China
- Prior art keywords
- rivet nut
- elastic
- proximal end
- distal end
- intramedullary nail
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Abstract
The utility model relates to a kind of flexible intramedullary nails, including proximal end rivet nut, the elastic rivet nut of distal end rivet nut and setting between them, proximal end inter-locking screw hole is provided in the rivet nut of proximal end, distal locking screw hole is provided in the rivet nut of distal end, it is characterized by: the elastic rivet nut is an integral structure with proximal end rivet nut and distal end rivet nut, the elastic rivet nut is hollow cylinder structure, and helical form elastic groove is provided on the side wall of elastic rivet nut.After the implantation fracture portions can with fine motion, elasticity modulus closer to human body, reduce stress shielding.
Description
Technical field
The utility model relates to the technical field of medical instrument, especially a kind of flexible intramedullary nail.
Background technique
Shin bone, femur long bone fracture be clinical common fracture, now intramedullary nail in the market is all with the design of AO principle, by force
What is adjusted is Titanic micro-plates.Since Titanic micro-plates make fracture end lack biology stimulation, it is unfavorable for growth of spur and fracture end
Healing, and intramedullary nail material is all made of titanium alloy manufacture, elasticity modulus is far longer than skeleton, due to stress shielding after operation
Cause stress to be concentrated, may cause inside-fixture and loosen or fracture, and due to the individual difference of human body, existing intramedullary nail without
Method meets all human body skeleton physiology shapes, there are intramedullary nail insertion is difficult when leading to partial surgical, resets unreasonable phenomenon.
In Chinese patent CN200810079983, a kind of flexible intramedullary nail is provided, is added between proximal end rivet nut and distal end rivet nut
Spring body so that intramedullary nail it is whole after be implanted into bones can with the muscular movement of human body, gravity and
Under external force, proximal end rivet nut and distal end rivet nut can produce fine motion, reduce stress shielding, but the current manufacture craft of the design
Design requirement cannot be reached.
Utility model content
The purpose of the utility model is to provide a kind of overcome the deficiencies in the prior art, structure is simple, one kind easy to use
After the implantation fracture portions can with fine motion, elasticity modulus closer to human body, reduce stress shielding flexible intramedullary nail.
To achieve the goals above, the technological means that the utility model is taken is:
A kind of flexible intramedullary nail, including proximal end rivet nut, the elastic rivet nut of distal end rivet nut and setting between them, close
It is provided with proximal end inter-locking screw hole in the rivet nut of end, distal locking screw hole is provided in the rivet nut of distal end, key is: described
Elastic rivet nut is an integral structure with proximal end rivet nut and distal end rivet nut, and the elastic rivet nut is hollow cylinder structure,
Helical form elastic groove is provided on the side wall of elastic rivet nut.
The diameter of the proximal end rivet nut is greater than the diameter of distal end rivet nut, and the length of proximal end rivet nut is less than distal end rivet nut
Length, in proximal end, the junction of rivet nut and distal end rivet nut is provided with the changeover portion rivet nut of taper type, of the elastic rivet nut
Number is at least one.
The side of the close changeover portion rivet nut of distal end rivet nut is arranged in the elastic rivet nut, or is arranged in proximal end rivet nut
Close changeover portion rivet nut side, or the side of the separate changeover portion rivet nut of distal end rivet nut is set.
The structure of the helical form elastic groove is the multi-head spiral groove being axially arranged along elastic rivet nut.
The spiral trough number of the multi-head spiral groove is at least 2, and the lead of multi-head spiral groove is 2mm-20cm.
The structure of the helical form elastic groove is the unilateral slot type structure of segmentation, is all rotated between each unilateral slot identical
The 5-1080 degree of angle.
The number of segment of the unilateral slot type structure of the segmentation is at least 1.
The beneficial effects of the utility model are:
1, the utility model devises a kind of flexible intramedullary nail of part-structure presence elasticity, is being implanted into according to BO principle
Fracture portions can stimulate growth of spur with fine motion afterwards, shorten healing time.
2, elasticity modulus reduces stress shielding closer to human body.
3, the intramedullary nail of this programme in insertion pulp cavity makes that difference can be adapted to automatically with intramedullary nail due to the presence of elastic rivet nut
The pulp cavity angle of human body, insertion facilitate reduction operating time.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of specific embodiment 1 in the utility model.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the A-A sectional view in Fig. 1.
Fig. 4 is the B-B sectional view in Fig. 1.
Fig. 5 is the C-C sectional view in Fig. 1.
Fig. 6 is the structural schematic diagram of specific embodiment 2 in the utility model.
Fig. 7 is the top view of Fig. 6.
Specific embodiment
The utility model is described further in the following with reference to the drawings and specific embodiments.
Specific embodiment 1, as shown in Figures 1 to 5, a kind of flexible intramedullary nail, including proximal end rivet nut 1, distal end rivet nut 2 and set
Elastic rivet nut 3 between them is set, proximal end inter-locking screw hole is provided in proximal end rivet nut 1, is arranged in distal end rivet nut 2
There is distal locking screw hole, it is characterised in that: the elastic rivet nut 3 and proximal end rivet nut 1 and distal end rivet nut 2 is integral type knot
Structure, the elastic rivet nut 3 are hollow cylinder structure, are provided with helical form elastic groove on the side wall of elastic rivet nut 3,
The diameter of the proximal end rivet nut 1 is greater than the diameter of distal end rivet nut 2, and the length of proximal end rivet nut 1 is less than the length of distal end rivet nut 2
Degree, in proximal end, the junction of rivet nut 1 and distal end rivet nut 2 is provided with the changeover portion rivet nut of taper type, of the elastic rivet nut 3
Number is at least one, and the side of the close changeover portion rivet nut of distal end rivet nut 2, the spiral is arranged in the elastic rivet nut 3
The structure of shape elastic groove is the unilateral slot type structure of segmentation, and the 5-1080 degree of equal angular is all rotated between each unilateral slot.Institute
The number of segment of the unilateral slot type structure for the segmentation stated is at least 1.
Settable different fluting spacing and notch size are designed according to elasticity, elastic rivet nut 3 can be arranged at 1 or more on demand
Place, elastic rivet nut 3 can be distributed in shaft any position in addition to screw hole, and according to the position of patient bone broken line, elastic rivet nut 3 is distributed
In the position closed on fracture line, it can be set in the side of the close changeover portion rivet nut of distal end rivet nut 2, also can be set close
The side for holding the close changeover portion rivet nut of rivet nut 1, can also be arranged in the side of the separate changeover portion rivet nut of distal end rivet nut 2.
When the rotation angle between unilateral slot is 5 degree, corresponding applicable fracture condition is transverse fracture or short oblique
Fracture；
When the rotation angle between unilateral slot is 30 degree, corresponding applicable fracture condition is transverse fracture or short oblique
Fracture；
When the rotation angle between unilateral slot is 45 degree, corresponding applicable fracture condition is wedge shape or long oblique bone
Folding；
When the rotation angle between unilateral slot is 90 degree, corresponding applicable fracture condition is comminuted fracture；
When the rotation angle between unilateral slot is 135 degree, corresponding applicable fracture condition is comminuted fracture or more piece
Section fracture；
When the rotation angle between unilateral slot is 180 degree, corresponding applicable fracture condition is comminuted fracture or more piece
Section fracture；
When the rotation angle between unilateral slot is 360 degree, corresponding applicable fracture condition is comminuted fracture or more piece
Section fracture；
When the rotation angle between unilateral slot is 720 degree, corresponding applicable fracture condition is fractures；
When the rotation angle between unilateral slot is 1080 degree, corresponding applicable fracture condition is fractures.
Specific embodiment 2, as shown in Figure 6 and Figure 7, the structure of the helical form elastic groove are axial along elastic rivet nut 3
The multi-head spiral groove of setting, the spiral trough number of the multi-head spiral groove are at least 2, and the lead of multi-head spiral groove is 2mm-
20cm。
According to elastic design arrangement multi-head spiral groove, and according to elastic demand, spiral trough number and lead, elastic nail are set
One or more can be arranged in body 3 on demand, and elastic rivet nut 3 can be distributed in shaft any position in addition to screw hole, according to patients with fractures
The position of line, elastic rivet nut 3 are distributed in the position closed on fracture line, and the close changeover portion nail in distal end rivet nut 2 can be set
The side of body also can be set in the side of the close changeover portion rivet nut of proximal end rivet nut 1, distal end rivet nut 2 can also be arranged in
Side far from changeover portion rivet nut.
When the lead of multi-head spiral groove is 2mm, corresponding applicable fracture condition is transverse fracture；
When the lead of multi-head spiral groove is 1cm, corresponding applicable fracture condition is transverse fracture；
When the lead of multi-head spiral groove is 5cm, corresponding applicable fracture condition is short oblique fracture；
When the lead of multi-head spiral groove is 10cm, corresponding applicable fracture condition is comminuted fracture；
When the lead of multi-head spiral groove is 20cm, corresponding applicable fracture condition is big section comminuted fracture, fractures.
Claims (7)
1. a kind of flexible intramedullary nail, including proximal end rivet nut (1), the elastic rivet nut of distal end rivet nut (2) and setting between them
(3), it is provided with proximal end inter-locking screw hole on proximal end rivet nut (1), is provided with distal locking screw hole on distal end rivet nut (2),
It is characterized by: the elastic rivet nut (3) is an integral structure with proximal end rivet nut (1) and distal end rivet nut (2), the elasticity
Rivet nut (3) is hollow cylinder structure, and helical form elastic groove is provided on the side wall of elastic rivet nut (3).
2. a kind of flexible intramedullary nail according to claim 1, it is characterised in that: the diameter of the proximal end rivet nut (1) is big
Diameter in distal end rivet nut (2), and the length of proximal end rivet nut (1) be less than distal end rivet nut (2) length, in proximal end rivet nut (1) and
The junction of distal end rivet nut (2) is provided with the changeover portion rivet nut of taper type, and the number of the elastic rivet nut (3) is at least one
It is a.
3. a kind of flexible intramedullary nail according to claim 2, it is characterised in that: the elastic rivet nut (3) is arranged remote
The side of the close changeover portion rivet nut of rivet nut (2) is held, or is arranged in the side of the close changeover portion rivet nut of proximal end rivet nut (1),
Or setting is in the side of the separate changeover portion rivet nut of distal end rivet nut (2).
4. a kind of flexible intramedullary nail according to any one of claims 1 to 3, it is characterised in that: the helical form elasticity
The structure of slot is the multi-head spiral groove being axially arranged along elastic rivet nut (3).
5. a kind of flexible intramedullary nail according to claim 4, it is characterised in that: the spiral trough of the multi-head spiral groove
Number is at least 2, and the lead of multi-head spiral groove is 2mm-20cm.
6. a kind of flexible intramedullary nail according to any one of claims 1 to 3, it is characterised in that: the helical form elasticity
The structure of slot is the unilateral slot type structure of segmentation, all rotates 5-1080 degree between each unilateral slot.
7. a kind of flexible intramedullary nail according to claim 6, it is characterised in that: the unilateral slot type structure of the segmentation
Number of segment is at least 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820719557.4U CN208958298U (en) | 2018-05-15 | 2018-05-15 | A kind of flexible intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820719557.4U CN208958298U (en) | 2018-05-15 | 2018-05-15 | A kind of flexible intramedullary nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208958298U true CN208958298U (en) | 2019-06-11 |
Family
ID=66747176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820719557.4U Active CN208958298U (en) | 2018-05-15 | 2018-05-15 | A kind of flexible intramedullary nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208958298U (en) |
-
2018
- 2018-05-15 CN CN201820719557.4U patent/CN208958298U/en active Active
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