CN208808626U - A rotatable elastic intramedullary nail that matches the curvature of the tibia - Google Patents
A rotatable elastic intramedullary nail that matches the curvature of the tibia Download PDFInfo
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- CN208808626U CN208808626U CN201820878341.2U CN201820878341U CN208808626U CN 208808626 U CN208808626 U CN 208808626U CN 201820878341 U CN201820878341 U CN 201820878341U CN 208808626 U CN208808626 U CN 208808626U
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- intramedullary nail
- main body
- nail main
- rotary head
- match
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- 210000002303 tibia Anatomy 0.000 title claims abstract description 59
- 210000000129 body of tibia Anatomy 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 9
- 208000010392 Bone Fractures Diseases 0.000 description 7
- 208000026137 Soft tissue injury Diseases 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002224 dissection Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 208000006735 Periostitis Diseases 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 210000003460 periosteum Anatomy 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000002980 postoperative effect Effects 0.000 description 2
- 210000004872 soft tissue Anatomy 0.000 description 2
- 208000017667 Chronic Disease Diseases 0.000 description 1
- 208000005214 Poroma Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 201000001013 eccrine acrospiroma Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
一种与胫骨弧度相匹配的可旋转弹性髓内钉，属于骨科医疗器械技术领域，用于方便地置入胫骨髓腔中。其技术方案是：髓内钉主体有弯曲弧度，弯曲弧度与胫骨中部和下部的弯曲弧度相匹配，髓内钉主体的上端与转动头相连接，在髓内钉主体的上顶面有垂直方向的连接杆，转动头为圆柱体，转动头的圆柱体的直径与髓内钉主体上端直径相匹配，转动头下端面有转动孔，转动孔与转动头圆柱体的中心轴线有夹角，夹角等于髓内钉主体与垂直方向的倾斜角度，转动孔套在连接杆上，转动孔与连接杆为转动配合。本实用新型在髓内钉近端设置转动头可以使髓内钉同时顺应胫骨近端和胫骨主体的解剖曲线，并可以保证髓内钉顺利置入，不因胫骨近端弧度导致置入髓内钉困难。
The utility model relates to a rotatable elastic intramedullary nail that matches the curvature of the tibia, belonging to the technical field of orthopaedic medical devices, and is used for being conveniently placed in the tibial medullary cavity. The technical scheme is as follows: the main body of the intramedullary nail has a curved radian, the curved radian is matched with the curved radian of the middle and lower parts of the tibia, the upper end of the intramedullary nail main body is connected with the rotating head, and the upper top surface of the intramedullary nail main body has a vertical direction. The rotating head is a cylinder, the diameter of the cylinder of the rotating head matches the diameter of the upper end of the main body of the intramedullary nail, the lower end of the rotating head has a rotating hole, and the rotating hole and the central axis of the rotating head cylinder have an included angle. The angle is equal to the inclination angle between the main body of the intramedullary nail and the vertical direction. The utility model provides a rotating head at the proximal end of the intramedullary nail, so that the intramedullary nail can conform to the anatomical curve of the proximal end of the tibia and the main body of the tibia at the same time, and can ensure the smooth placement of the intramedullary nail, and the placement of the intramedullary nail is not caused by the curvature of the proximal end of the tibia. Nail difficult.
Description
Technical field
The utility model relates to a kind of for treating the intramedullary nail of fracture of tibia, belong to orthopedic medical device technical field.
Background technique
Fracture of tibia is the common disease of bone fracture surgery, ever-increasing trend is presented in recent years, medical profession is to fracture of tibia
Treatment also focus more on.Fixed, external fixing rack and tibial intramedullary nailing etc. are all clinical treatment fracture of tibia in compression steel plate
Common method.It is fixed in compression steel plate that there are the advantages such as fixed and easy to operate, but this method need periosteum is extensive
Removing, it is larger to damage caused by soft tissue, it is easy to cause various complication, influences patient's post-operative recovery；External fixing rack operation
It is not fixed firmly simply but easily, the problems such as pin site infection easily occurs in External fixation screw；And tibial intramedullary nailing fixation more meets people
Body biomechanical principle can effectively avoid the damage to soft tissue and periosteum, facilitate poroma at knochenbruch and formed, and promote fracture
Healing, have soft tissue injury is light, minimally invasive, fixed reliable, operating time is short, functional rehabilitation is fast, postoperative rehabilitation take exercise it is early etc. excellent
Point.Curvature in shin bone marrow used at present on the contrary, this problem does not solve so far, becomes intramedullary nail treatment with shin bone curvature
The chronic illness of fracture of tibia.Specifically, the proximal end of traditional intramedullary nail used at present is crooked radian forward, so as to intramedullary nail
It is convenient to be placed in from tibial tubercle, is placed to intramedullary nail successfully in the cavity of shin bone.But proximal tibia is and shin bone
The opposite recurvate state of intramedullary nail crooked radian causes when being placed in intramedullary nail from proximal tibia, intramedullary nail in place after,
The crooked radian of the proximal end of intramedullary nail and the crooked radian of proximal tibia on the contrary, cannot with proximal tibia coincide, do not meet shin bone
Mechanics feature.And if by the proximal end of intramedullary nail in merging front curve at the bending state with the proximal tibia same direction, hardly possible
To be placed in shin bone.Such case causes intramedullary nail merging difficulty, and intramedullary nail smoothly cannot be placed in shin bone pulp cavity,
Operating time is not only extended, surgical effect is also directly affected, it would be highly desirable to which medical worker and scientific and technical personnel are resolved.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of rotatable elastic intramarrows to match with shin bone radian
Interior nail, the rivet nut of this intramedullary nail and proximal end can the curvature respectively with shin bone cavity and proximal tibia match, meet shin
The dissection radian of bone can guarantee that intramedullary nail is smoothly placed in when being placed in intramedullary nail, not because of the different physiological bending arcs of shin bone
Degree cause to be placed in intramedullary nail it is difficult, while when remaining conventional intramedullary nails reliable, operation light to soft tissue injury, minimally invasive, fixed
Between it is short the advantages that.
Solving above-mentioned technical problem technical solution is:
A kind of rotatable flexible intramedullary nail to match with shin bone radian, it includes intramedullary nail main body and rotary head, in marrow
Nail main body has a crooked radian, matches in the middle part of crooked radian and shin bone with the crooked radian of lower part, the upper end of intramedullary nail main body and
Rotary head is connected, and has the connecting rod of vertical direction in the upper top surface of intramedullary nail main body, rotary head is cylindrical body, the circle of rotary head
The diameter of cylinder matches with intramedullary nail main body upper end diameter, and there is rotation hole in rotary head lower end surface, and rotation hole is under rotary head
End face is upward, and the central axis of rotation hole and rotary head cylindrical body has an angle, and angle is equal to intramedullary nail main body and vertical direction
Tilt angle, the rotation hole internal diameter of rotary head and the connecting rod outer diameter of top surface in intramedullary nail main body match, and rotation hole is covered even
On extension bar, rotation hole is to be rotatably assorted with connecting rod.
The above-mentioned rotatable flexible intramedullary nail to match with shin bone radian holds out against screw hole on the side wall of the rotary head,
It holds out against screw hole and is connected by rotary head side wall with rotation hole, puller bolt passes through the company for holding out against screw hole Yu intramedullary nail main body upper end
Extension bar holds out against connection.
The above-mentioned rotatable flexible intramedullary nail to match with shin bone radian, the upper and lower part difference of the intramedullary nail main body
There is the elastic groove of a plurality of circular intramedullary nail main body circumference, the length of every elastic groove is the circumference of 1/4-1/2 intramedullary nail main body
Degree, the groove body section of elastic groove are wedge shape, and the axis of elastic groove and intramedullary nail main body length direction is in 60-80 degree angle, in marrow
The a plurality of elastic groove for following closely the upper and lower part of main body is respectively 3-5 circle, and 3-5 encloses the parallel alternative ring of elastic groove around intramedullary nail main body circle
Week.
The above-mentioned rotatable flexible intramedullary nail to match with shin bone radian, the intramedullary nail main body are hollow intramedullary nail,
There is tensioning hole in the opposing sidewalls of the upper and lower part of intramedullary nail main body respectively, tensioning wirerope is located in intramedullary nail main body, is tensioned
Wirerope both ends are connected separately with screw rod, and screw rod is each passed through the tensioning hole on intramedullary nail body top and lower sides by nut
It fastens.
The above-mentioned rotatable flexible intramedullary nail to match with shin bone radian, the tensioning wirerope have two, two tensioning steel
Cable is arranged in a crossed manner in the cavity of intramedullary nail main body respectively, and the both ends of two tensioning wireropes are respectively opposite the two of intramedullary nail main body
Side.
The beneficial effects of the utility model are:
The intramedullary nail proximal end of the utility model is provided with rotary rotary head, when being placed in intramedullary nail, rotary head
Bending direction it is consistent with the bending direction of shin bone, enter shin bone after, rotary head can be turned to identical as proximal tibia
Bending direction more meet the dissection radian of shin bone so that intramedullary nail forms three-dimensional S type structure；The circumference of intramedullary nail main body
There are multiple elastic grooves, can be very good dispersive stress；Two tensioning wireropes are provided in intramedullary nail main body, tensioning wirerope, which generates, to be opened
Power, can be to increase the intensity of intramedullary nail.
The utility model is the pioneering of intramedullary nail, solves bending direction and shin bone master of the conventional intramedullary nails because of proximal tibia
It is placed in difficult problem caused by the bending direction of body is opposite, intramedullary nail can be made same by the way that rotary head is arranged in intramedullary nail proximal end
The dissection curve of Shi Shunying proximal tibia and shin bone main body, and can guarantee that intramedullary nail is smoothly placed in, not because of proximal tibia radian
Cause to be placed in intramedullary nail difficulty, while remaining conventional intramedullary nails reliable, operating time light to soft tissue injury, minimally invasive, fixed
The advantages that short.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the cross-sectional view of Fig. 1；
Fig. 3 is the structural schematic diagram of rotary head；
Fig. 4 is the rotary state schematic diagram of rotary head.
Mark in figure as follows: intramedullary nail main body 1, connecting rod 3, rotation hole 4, holds out against screw hole 5, elastic groove 6, opens rotary head 2
Tieholen 7, tensioning wirerope 8, screw rod 9, nut 10.
Specific embodiment
The utility model is made of intramedullary nail main body 1, rotary head 2.
It is shown in figure, shin bone has a crooked radian in the longitudinal direction, and crooked radian is not only in a plane shin
Projection of the crooked radian of bone in the plane to intersect vertically of two, space is S type, i.e., a three-dimensional S is presented in space
Type, therefore the intramedullary nail being placed in 11 pulp cavity of shin bone is also consistent with the crooked radian of shin bone, intramedullary nail should also be one three
The S type of dimension.
It is shown in figure, the S type of intramedullary nail is divided into two parts, and a part is that intramedullary nail main body 1 has crooked radian, crooked radian
Match with the crooked radian of in the middle part of shin bone and lower part, another part is that the bending direction of intramedullary nail proximal end should be with proximal tibia
Crooked radian it is corresponding so that not only curved shape is S-shaped for intramedullary nail main body 1 and intramedullary nail proximal end, and not in the same space
In plane.If intramedullary nail uses such shape, when being placed in shin bone with regard to highly difficult, therefore the utility model is close by intramedullary nail
End is improved to rotary rotary head 2, to facilitate merging shin bone.
It is shown in figure, the upper end of intramedullary nail main body 1 is connected with rotary head 2, has vertically in the upper top surface of intramedullary nail main body 1
The connecting rod 3 in direction, rotary head 2 are cylindrical body, diameter and the 1 upper end diameter phase of intramedullary nail main body of the cylindrical body of rotary head 2
Match, there is rotation hole 4 in 2 lower end surface of rotary head, and rotation hole 4 faces upward from the lower end of rotary head 2, rotation hole 2 and 2 cylindrical body of rotary head
Central axis have an angle, angle is equal to the tilt angle of intramedullary nail main body 1 and vertical direction, 4 internal diameter of rotation hole of rotary head 2
Match with 3 outer diameter of connecting rod of top surface in intramedullary nail main body 1,4 sets of rotation hole in connecting rod 3, rotation hole 4 and connecting rod 3
To be rotatably assorted.
Using such structure, when being placed in intramedullary nail, the center axis thereof of 2 cylindrical body of rotary head is arrived and intramedullary nail
The identical direction in 1 upper end of main body, rotary head 2 are consistent with the bending direction of intramedullary nail main body 1, it is easy to be open and dispose from shin bone
Enter.After the merging in place of intramedullary nail main body 1, rotary head 2 should also enter in shin bone pulp cavity, and the cylindrical body of rotary head 2 is rotated
To direction identical with proximal tibia, it can make intramedullary nail is whole to reach consistent with 11 crooked radian of shin bone.
It is shown in figure, screw hole 5 is held out against on the side wall of rotary head 2, held out against screw hole 5 and pass through 2 side wall of rotary head and rotary head 2
Rotation hole 4 be connected.After rotary head 2 rotate in place, puller bolt is passed through and holds out against screw hole 5 and 1 upper end of intramedullary nail main body
Connecting rod 3 hold out against connection, keep rotary head 2 and intramedullary nail main body 1 fixed.
It is shown in figure, there is the elastic groove of a plurality of circular 1 circumference of intramedullary nail main body in the upper and lower part of intramedullary nail main body 1 respectively
6, the length of every elastic groove 6 is the circumferential length of 1/4-1/2 intramedullary nail main body, and the groove body section of elastic groove 6 is wedge shape, elasticity
The axis of slot 6 and 1 length direction of intramedullary nail main body is in 60-80 degree angle, a plurality of elasticity of the upper and lower part of intramedullary nail main body 1
Slot 6 is respectively 3-5 circle, and 3-5 encloses 6 parallel ring of elastic groove around 1 circumference of intramedullary nail main body.Elastic groove 1 can disperse well
Stress, and make intramedullary nail that there is elasticity well.
It is shown in figure, when intramedullary nail main body 1 is hollow intramedullary nail, in order to increase the intensity of intramedullary nail, in intramedullary nail
Tensioning wirerope 8 is provided in cavity.Specific structure is that have respectively in the opposing sidewalls of the upper and lower part of intramedullary nail main body 1
7 holes are tensioned, tensioning wirerope 8 is located in intramedullary nail main body 1, and tensioning 8 both ends of wirerope are connected separately with screw rod 9, and screw rod 9 is each passed through
Tensioning hole 7 on 1 upper and lower part side wall of intramedullary nail main body is tensioned by nut 10 to be fixed, to increase the intensity of intramedullary nail.
It is shown in figure, tensioning wirerope 8 has two, and two tensioning wireropes 8 intersect in the cavity of intramedullary nail main body 1 respectively to be set
It sets, the both ends of two tensioning wireropes 8 are respectively in the opposite sides of intramedullary nail main body 1.Installation tensioning wirerope 8 is before intramedullary nail factory
It carries out, the screw rod 9 for being tensioned 8 both ends of wirerope is each passed through the tensioning hole 7 on 1 upper and lower part side wall of intramedullary nail main body, is screwed on
Nut 10 carries out screw rod 9 to tighten pressurization, makes to be tensioned the generation tension of wirerope 8, after tension reaches a certain level, by exposed spiral shell
Bar 9 and the polishing of nut 10 are concordant with 1 outer wall of intramedullary nail main body, polishing, reduce the resistance in merging.
The diameter of the tensioning wirerope 8 of one embodiment of the utility model is 2mm.
Claims (5)
1. a kind of rotatable flexible intramedullary nail to match with shin bone radian, it is characterised in that: it include intramedullary nail main body (1) and
Rotary head (2), intramedullary nail main body (1) have crooked radian, and crooked radian and the crooked radian of in the middle part of shin bone and lower part match, marrow
The upper end of interior nail main body (1) is connected with rotary head (2), has the connecting rod of vertical direction in the upper top surface of intramedullary nail main body (1)
(3), rotary head (2) is cylindrical body, and diameter and intramedullary nail main body (1) upper end diameter of the cylindrical body of rotary head (2) match, and is turned
Dynamic head (2) lower end surface has rotation hole (4), and rotation hole (4) faces upward from the lower end of rotary head (2), rotation hole (4) and rotary head
(2) central axis of cylindrical body has angle, and angle is equal to the tilt angle of intramedullary nail main body (1) and vertical direction, rotary head (2)
Rotation hole (4) internal diameter and connecting rod (3) outer diameter of top surface on intramedullary nail main body (1) match, rotation hole (4) is covered in connecting rod
(3) on, rotation hole (4) is to be rotatably assorted with connecting rod (3).
2. the rotatable flexible intramedullary nail according to claim 1 to match with shin bone radian, it is characterised in that: described turn
Screw hole (5) are held out against on the side wall of dynamic head (2), screw hole (5) is held out against and is connected by rotary head (2) side wall with rotation hole (4), pushed up
Tight bolt is passed through to hold out against screw hole (5) and hold out against with the connecting rod (3) of intramedullary nail main body (1) upper end and be connect.
3. the rotatable flexible intramedullary nail according to claim 1 to match with shin bone radian, it is characterised in that: the marrow
There are the elastic groove (6) of a plurality of circular intramedullary nail main body (1) circumference, every elastic groove in the upper and lower part of interior nail main body (1) respectively
(6) length is the circumferential length of 1/4-1/2 intramedullary nail main body (1), and the groove body section of elastic groove (6) is wedge shape, elastic groove (6)
Axis with intramedullary nail main body (1) length direction is in 60-80 degree angle, a plurality of bullet of the upper and lower part of intramedullary nail main body (1)
Property slot (6) be respectively 3-5 circle, 3-5 enclose elastic groove (6) parallel ring around intramedullary nail main body (1) circumference.
4. the rotatable flexible intramedullary nail according to claim 1 to match with shin bone radian, it is characterised in that: the marrow
Interior nail main body (1) is hollow intramedullary nail, has tensioning hole respectively in the opposing sidewalls of the upper and lower part of intramedullary nail main body (1)
(7), tensioning wirerope (8) is located in intramedullary nail main body (1), and tensioning wirerope (8) both ends are connected separately with screw rod (9), screw rod (9) point
Not Chuan Guo the tensioning hole (7) on the side wall of intramedullary nail main body (1) upper and lower part be tensioned and fix by nut (10).
5. the rotatable flexible intramedullary nail according to claim 4 to match with shin bone radian, it is characterised in that: described
Tight wirerope (8) has two, and two tensioning wireropes (8) are arranged in a crossed manner in the cavity of intramedullary nail main body (1) respectively, is tensioned wirerope
(8) both ends are respectively in the opposite sides of intramedullary nail main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820878341.2U CN208808626U (en) | 2018-06-07 | 2018-06-07 | A rotatable elastic intramedullary nail that matches the curvature of the tibia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820878341.2U CN208808626U (en) | 2018-06-07 | 2018-06-07 | A rotatable elastic intramedullary nail that matches the curvature of the tibia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208808626U true CN208808626U (en) | 2019-05-03 |
Family
ID=66269537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820878341.2U Withdrawn - After Issue CN208808626U (en) | 2018-06-07 | 2018-06-07 | A rotatable elastic intramedullary nail that matches the curvature of the tibia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208808626U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108814696A (en) * | 2018-06-07 | 2018-11-16 | 河北医科大学第三医院 | A kind of rotatable flexible intramedullary nail to match with shin bone radian |
-
2018
- 2018-06-07 CN CN201820878341.2U patent/CN208808626U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108814696A (en) * | 2018-06-07 | 2018-11-16 | 河北医科大学第三医院 | A kind of rotatable flexible intramedullary nail to match with shin bone radian |
| CN108814696B (en) * | 2018-06-07 | 2019-08-02 | 河北医科大学第三医院 | A kind of rotatable flexible intramedullary nail to match with shin bone radian |
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Granted publication date: 20190503 Effective date of abandoning: 20190802 |
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