CN204092152U - A kind of self-locking compress intramedullary nail making fracture two ends fluid-tight engagement - Google Patents

A kind of self-locking compress intramedullary nail making fracture two ends fluid-tight engagement Download PDF

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Publication number
CN204092152U
CN204092152U CN201420414266.6U CN201420414266U CN204092152U CN 204092152 U CN204092152 U CN 204092152U CN 201420414266 U CN201420414266 U CN 201420414266U CN 204092152 U CN204092152 U CN 204092152U
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CN
China
Prior art keywords
intramedullary pin
pin body
fracture
core body
intramedullary
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CN201420414266.6U
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Chinese (zh)
Inventor
杨涛
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杨涛
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Priority to CN201420414266.6U priority Critical patent/CN204092152U/en
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Publication of CN204092152U publication Critical patent/CN204092152U/en

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Abstract

Make a self-locking compress intramedullary nail for fracture two ends fluid-tight engagement, comprise intramedullary pin body; Be provided with outside the near-end of intramedullary pin body and prevent revolving projection; In intramedullary pin body, be provided with core body, core body be positioned at intramedullary pin body and be hinged with Inner locking needle, intramedullary pin body is provided with the inclined hole passed for Inner locking needle, and inclined hole is inclined upwardly from inside to outside; The axial drive means allowing core body axially-movable be connected with core body is provided with in one end of intramedullary pin body.By anti-projection of revolving, intramedullary pin is fixed with fracture near-end when installing and using, the core body realized in intramedullary pin body by axial drive means is again moved to intramedullary pin body proximal direction, the inclined hole making Inner locking needle pass intramedullary pin body enters into medullary cavity inwall, two active forces are in opposite directions formed at fracture two ends, fracture end is played to the effect of pressurization, thus fracture two ends can be engaged closely.When intramedullary pin takes out, inverted sequence operates, and utilizes driving device to be regained in intramedullary pin body by Inner locking needle, is taken out by intramedullary pin by external force.

Description

A kind of self-locking compress intramedullary nail making fracture two ends fluid-tight engagement

Technical field

This utility model belongs to medical instruments field, is specifically related to the self-locking compress intramedullary nail of the made fracture two ends fluid-tight engagement that a kind of orthopaedics is fixed.

Background technology

Operative treatment at present for long bone shaft fracture adopts the fixationes such as intramedullary needle, steel plate, external fixer usually, in internal fixation by intramedullary pin, general intramedullary needle is provided with closely, the pinning through hole of distal radial, in use, intramedullary needle is inserted in pulp cavity, then in the long bone cortex of health, the pinning lead to the hole site place of corresponding intramedullary needle stamps corresponding through hole, makes pinning can, distal lockhole near through long bone cortex and intramedullary needle, reaches the effect of locking.Use this intramedullary needle, pinning that is near, far-end two ends is needed to be connected and fixed, during installation, intramedullary needle is placed to after in pulp cavity and holes again, cannot well in the position that long bone cortex is near, far-end finds corresponding intramedullary needle pinning through hole accurately, pinning can be caused like this to be difficult to through long bone cortex and lockhole, hole at the long bone cortex place of health simultaneously, also bring new wound and pain to patient; In addition, because the position between pinning through hole is determined, and pinning through hole is radial arrangement, in installation pinning process, can not produce axial opposing compression power, fracture two ends are difficult to the object reaching fluid-tight engagement, after pinning realizes intramedullary needle locking through pinning through hole, not intimately associated because of fracture two ends makes healing delay or the disunion of fracture end, and time serious, postoperative also needs takes out one end pinning to reach the object of union of fracture.

In order to solve the problems of the technologies described above, also occurred a kind of intramedullary needle, as applied on May 30th, 2000, April 11 calendar year 2001, the Chinese utility model patent description CN2426343Y of bulletin disclosed one in marrow to the outer self-locking pressure intramedullary pin of cortex.This intramedullary needle comprises marrow inner needle and Inner locking needle, and marrow inner needle is placed in the pulp cavity of long bone, then Inner locking needle is penetrated marrow inner needle and makes the most advanced and sophisticated position of Inner locking needle pass corresponding internal lock pin hole along Inner locking needle bore deformation and be fixed on long bone.In the long bone process of fixing fracture, one end of marrow inner needle act on be positioned at fracture one end long bone on, when utilizing Inner locking needle fixed length cannon born, Inner locking needle tip has active force forward, like this, for long bone to the long bone being positioned at the fracture other end, easily form opposite effect power at fracture, fracture two ends are difficult to the object reaching fluid-tight engagement, and make the healing of fracture limited, recovery time is long.

Utility model content

The purpose of this utility model is to provide a kind of simple installation, can make the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement.

In order to solve the problems of the technologies described above, this utility model can make the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement comprise intramedullary pin body, and the near-end of intramedullary pin body is provided with to be prevented revolving projection; Movablely in intramedullary pin body be provided with core body, the cross section of core body is non-circular, core body is positioned at intramedullary pin body and is hinged with Inner locking needle, and intramedullary pin body is provided with the inclined hole passed for Inner locking needle, and inclined hole is inclined upwardly from inside to outside; The axial drive means allowing core body axially-movable be connected with core body is provided with in one end of intramedullary pin body.

By preventing that revolving projection makes intramedullary pin and fracture near-end fix when installing and using, the core body realized in intramedullary pin body by axial drive means is again moved to intramedullary pin body proximal direction, the inclined hole making Inner locking needle pass intramedullary pin body enters into the medullary cavity internal fixtion of the fracture other end, two active forces are in opposite directions formed at fracture two ends, fracture end is played to the effect of pressurization, thus fracture two ends can be engaged closely.When intramedullary pin takes out, inverted sequence operates, and utilizes driving device to be regained in intramedullary pin body by Inner locking needle, is taken out by intramedullary pin by external force.

As further improvement of the utility model, axial drive means can be threaded drive, threaded drive comprises inner screw sheath and is connected to the blocking part of inner screw sheath upper end, external screw thread is provided with at the near-end of core body, inner screw sheath is meshed with the male thread portion of core body, and blocking part is kept out on the upper surface of intramedullary pin body; Adopt the axial drive means of this structure that the movement operating core body can be made convenient, the effect of blocking part to intramedullary pin body simultaneously makes fracture two ends engage more closely.

As further improvement of the utility model, Inner locking needle can be arranged on the left side of core body distal portion, right side and rear side respectively, adopt and in this way Inner locking needle is installed, what intramedullary pin can be made to play anti-ly revolves fixed effect, the Inner locking needle being simultaneously arranged on rear side when intramedullary pin is placed to joint part fracture, causes internal lock acupuncture to have the generation of the accident of skin to prevent because of the activity of joint part.

As further improvement of the utility model, Inner locking needle installation site axially equidistantly can be dislocatedly distributed along core body, and what intramedullary pin can be made to play anti-ly revolves pressurization fixed effect.

As further improvement of the utility model, anti-projection of revolving can be arranged on the left side of intramedullary pin body close end outer rim, right side and front side, can playing like this and better prevent being rotated with fixed effect and revolve projection by being arranged on the anti-of front side, can be convenient to when installing intramedullary pin observe.

As further improvement of the utility model, the upper surface of blocking part can be provided with interior hexagonal blind hole, like this can be convenient remove rotating female screw cover.

As further improvement of the utility model, Inner locking needle can be circular arc type, and upward, inclined hole is circular arc type to bending direction simultaneously, like this when core body moves, the power that Inner locking needle produces along intramedullary pin axial direction is larger, and fracture two ends can be made to be bonded together more closely, and the inclined hole simultaneously following closely cover is circular arc type, when Inner locking needle is through this circular arc inclined hole, Inner locking needle and inclined hole are fitted more, decrease rocking of core body, play and better prevent revolving fixed effect.

As further improvement of the utility model, can be provided with torsion spring between core body and Inner locking needle, like this when core body moves, Inner locking needle can pass inclined hole more smoothly.

As further improvement of the utility model, anti-projection of revolving can be wedge shape, its bevel direction towards nail cover lower end, adopt this structure anti-revolve that projection can be convenient enter into sclerotin, play anti-effect of revolving.

As further improvement of the utility model, prevent revolving in projection and can being provided with through hole; The near-end inwall of intramedullary pin body is provided with female thread, and intramedullary pin body, for installing threaded rod, is squeezed into intramedullary cavity and taking-up by external force action on threaded rod by female thread, adopts this structure conveniently intramedullary pin body can be squeezed into intramedullary cavity and taking-up.

In sum, the utility model has the advantages that simple installation and fracture two ends fluid-tight engagement can be made to reach the object shortening rehabilitation duration.

Accompanying drawing explanation

Below in conjunction with accompanying drawing and with detailed description of the invention, this utility model is described in further detail.

Fig. 1 is the structural representation making the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement of the present utility model.

Fig. 2 is the structural representation making the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement of the present utility model.

Fig. 3 is the decomposing schematic representation making the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement of the present utility model.

Fig. 4 is the sectional view making the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement of the present utility model.

Fig. 5 is the second structural representation making the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement of the present utility model.

Fig. 6 is the second structural representation making the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement of the present utility model.

Fig. 7 is the third structural representation making the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement of the present utility model.

Detailed description of the invention

By described in Fig. 1 to Fig. 4, this utility model can make the self-locking compress intramedullary nail of fracture two ends fluid-tight engagement comprise intramedullary pin body 1, the upper end of intramedullary pin body 1 is provided with prevents revolving protruding 2, anti-revolve protruding 2 left sides being arranged on intramedullary pin body 1 close end outer rim, right side and front side, anti-projection 2 of revolving is for wedge shape, its bevel direction is towards intramedullary pin body 1 lower end, and anti-projection 2 of revolving is provided with through hole 3; Core body 4 is provided with in intramedullary pin body 1, the cross section of core body 4 is non-circular, core body 4 is positioned at intramedullary pin body 1 and is hinged with Inner locking needle 5, Inner locking needle 5 is arranged on the left side of core body 4 distal portion, right side and rear side respectively, Inner locking needle 5 installation site is axially equidistantly dislocatedly distributed along core body 4, intramedullary pin body 1 is provided with the inclined hole 6 passed for Inner locking needle 5, and inclined hole 6 is inclined upwardly from inside to outside; The threaded drive 7 allowing core body 4 axially-movable be connected with core body 4 is provided with in one end of intramedullary pin body 1, threaded drive 7 comprises inner screw sheath 8 and is connected to the blocking part 9 of inner screw sheath 8 upper end, external screw thread is provided with at the near-end of core body 4, inner screw sheath 8 is meshed with the male thread portion of core body 4, blocking part 9 is kept out on the upper surface of intramedullary pin body 1, the upper surface of blocking part 9 is provided with interior hexagonal blind hole 10, and the near-end inwall 11 of intramedullary pin body 1 is provided with female thread.

When intramedullary pin is installed and used, the core body 4 that Inner locking needle 5 is housed first is encased in intramedullary pin body 1, then by the threaded engagement at upper end inwall 11 place of target apparatus and intramedullary pin body 1, intramedullary pin body 1 is driven in the pulp cavity of long bone fracture end, anti-projection 2 of revolving is made to enter in pulp cavity sclerotin, due to anti-revolve protruding 2 adopt be wedge structure and bevel direction towards intramedullary pin body 1 lower end, anti-like this projection 7 of revolving can easierly enter in pulp cavity sclerotin, and then by inner screw sheath 8 and core body 4 threaded engagement, by die nut and the mating reaction of interior hexagonal blind hole 10, to intramedullary pin body 1 time extreme direction rotating female screw cover 8, anti-revolve protruding 2 in pulp cavity sclerotin because intramedullary pin body 1 outer rim has, can prevent intramedullary pin body 1 from rotating when rotating female screw overlaps 8, simultaneously because the cross section of core body 4 is non-circular, the rotation of core body 4 when adopting this structure can prevent rotating female screw from overlapping 8, when inner screw sheath 8, core body 4 is in axial direction moved to intramedullary pin body 1 proximal direction, in moving process, make Inner locking needle 5 enter in pulp cavity sclerotin through after inclined hole 6, Inner locking needle 5 produces and acts on the power of pulp cavity sclerotin to extreme direction on intramedullary pin body 1, simultaneously owing to overlapping 8 to intramedullary pin body 1 time extreme direction rotating female screw, the blocking part 9 of inner screw sheath 8 is produced and acts on the power of intramedullary pin body 1 to intramedullary pin body 1 time extreme direction, revolve protruding 2 because anti-in pulp cavity sclerotin, institute acts on the power of pulp cavity sclerotin to intramedullary pin body 1 time extreme direction in case revolve protruding 2 generations, like this when rotating female screw overlaps 8, intramedullary needle produces simultaneously and acts on the power of pulp cavity sclerotin to direction, intramedullary pin body 1 top and bottom, fracture end is played to the effect of pressurization, and fracture two ends can be engaged closely.When intramedullary needle will be taken out, inner screw sheath 8 can be screwed out, core body 4 moves back to origin-location to intramedullary pin body 1 lower end, Inner locking needle 5 is also return in inclined hole 6 to intramedullary pin body 1, and then establish female inwall 11 to be connected with target apparatus and intramedullary pin body 1 upper end, and connect the anti-through hole 3 revolved on protruding 2, intramedullary pin body 1 can be taken out quickly and easily.

Anti-revolve protruding 2 left sides being arranged on intramedullary pin body 1 outer rim, right side and front side.Can playing like this and better prevent being rotated with fixed effect and revolve protruding 2 by being arranged on the anti-of front side, can be convenient to when installing intramedullary pin observe.Inner locking needle 5 is arranged on the left of core body 4 respectively, right side and rear side, adopt and in this way Inner locking needle 5 is installed, what intramedullary pin can be made to play anti-ly revolves fixed effect, the Inner locking needle 5 being simultaneously arranged on rear side when intramedullary pin is placed to joint part fracture, causes Inner locking needle 5 to sting out the generation of the accident of skin to prevent because of the activity of joint part.

Intramedullary pin body 1 upper end that the application records as shown in Figure 4 is the upper position shown in figure.

By shown in Fig. 5 to Fig. 6, Inner locking needle 5 can be circular arc type, and upward, inclined hole 6 is in circular arc type simultaneously for bending direction, like this when core body 4 moves, the power that Inner locking needle 5 produces along intramedullary pin body 1 axial direction is larger, and fracture two ends can be made like this to be bonded together more closely, and the inclined hole 6 of intramedullary pin body 1 is circular arc type simultaneously, when such Inner locking needle 5 is through this circular arc inclined hole 6, Inner locking needle 5 and inclined hole 6 are fitted more, decrease rocking of core body 4, play and better prevent revolving fixed effect.

As shown in Figure 7, Inner locking needle 5 can be circular arc type, and upward, inclined hole 6 is in circular arc type simultaneously for bending direction, like this when core body 4 moves, Inner locking needle 5 more easily passes and returns inclined hole 6, is conducive to the taking-up of intramedullary pin, and the inclined hole 6 of intramedullary pin body 1 is circular arc type simultaneously, when such Inner locking needle 5 is through this circular arc inclined hole 6, Inner locking needle 5 and inclined hole 6 are fitted more, decrease rocking of core body 4, play and better prevent revolving fixed effect.

As the further improvement of this intramedullary pin, can be provided with torsion spring between core body 4 and Inner locking needle 5, like this when core body 4 moves, Inner locking needle 5 can pass inclined hole 6 more smoothly.

Claims (10)

1. can make a self-locking compress intramedullary nail for fracture two ends fluid-tight engagement, comprise intramedullary pin body; It is characterized in that: the near-end of intramedullary pin body is provided with to be prevented revolving projection; Movablely in intramedullary pin body be provided with core body, the cross section of core body is non-circular, core body is positioned at intramedullary pin body and is hinged with Inner locking needle, and intramedullary pin body is provided with the inclined hole passed for Inner locking needle, and inclined hole is inclined upwardly from inside to outside; The axial drive means allowing core body axially-movable be connected with core body is provided with in one end of intramedullary pin body.
2. by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 1, it is characterized in that: described axial drive means is threaded drive, described threaded drive comprises inner screw sheath and is connected to the blocking part of inner screw sheath upper end, external screw thread is provided with at the near-end of core body, inner screw sheath is meshed with the male thread portion of core body, and blocking part is kept out on the upper surface of intramedullary pin body.
3. by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 1, it is characterized in that: described Inner locking needle is arranged on the left side of core body distal portion, right side and rear side respectively.
4. by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 3, it is characterized in that: described Inner locking needle installation site is axially equidistantly dislocatedly distributed along core body.
5. by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 1, it is characterized in that: described anti-projection of revolving is arranged on the left side of intramedullary pin body close end outer rim, right side and front side.
6. by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 2, it is characterized in that: on the upper surface of blocking part, be provided with interior hexagonal blind hole.
7. by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 1, it is characterized in that: described Inner locking needle is circular arc type, upward, described inclined hole is circular arc type to bending direction.
8., by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 1, it is characterized in that: between core body and Inner locking needle, be provided with torsion spring.
9. by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 1, it is characterized in that: described anti-projection of revolving is for wedge shape, and its bevel direction is towards intramedullary pin body lower end.
10. by the self-locking compress intramedullary nail making fracture two ends fluid-tight engagement according to claim 1, it is characterized in that: describedly anti-revolve projection and be provided with through hole; The near-end inwall of intramedullary pin body is provided with female thread.
CN201420414266.6U 2014-07-25 2014-07-25 A kind of self-locking compress intramedullary nail making fracture two ends fluid-tight engagement CN204092152U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420414266.6U CN204092152U (en) 2014-07-25 2014-07-25 A kind of self-locking compress intramedullary nail making fracture two ends fluid-tight engagement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420414266.6U CN204092152U (en) 2014-07-25 2014-07-25 A kind of self-locking compress intramedullary nail making fracture two ends fluid-tight engagement

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104083199A (en) * 2014-07-25 2014-10-08 杨涛 Self-locking pressurizing intramedullary nail capable of making two ends of fracture portion tightly joined
CN110693591A (en) * 2019-10-22 2020-01-17 固安博健生物技术有限公司 Intramedullary nail with stability
CN110693589A (en) * 2019-10-22 2020-01-17 固安博健生物技术有限公司 Anti-sway intramedullary nail
CN110693590A (en) * 2019-10-22 2020-01-17 固安博健生物技术有限公司 Multifunctional intramedullary nail

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104083199A (en) * 2014-07-25 2014-10-08 杨涛 Self-locking pressurizing intramedullary nail capable of making two ends of fracture portion tightly joined
CN110693591A (en) * 2019-10-22 2020-01-17 固安博健生物技术有限公司 Intramedullary nail with stability
CN110693589A (en) * 2019-10-22 2020-01-17 固安博健生物技术有限公司 Anti-sway intramedullary nail
CN110693590A (en) * 2019-10-22 2020-01-17 固安博健生物技术有限公司 Multifunctional intramedullary nail

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150114

Termination date: 20170725

CF01 Termination of patent right due to non-payment of annual fee