CN211704796U - Intramedullary nail and intramedullary nail internal fixation kit - Google Patents
Intramedullary nail and intramedullary nail internal fixation kit Download PDFInfo
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- CN211704796U CN211704796U CN201920965902.7U CN201920965902U CN211704796U CN 211704796 U CN211704796 U CN 211704796U CN 201920965902 U CN201920965902 U CN 201920965902U CN 211704796 U CN211704796 U CN 211704796U
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Abstract
The utility model provides an intramedullary nail and an intramedullary nail internal fixation external member, which belongs to the field of medical instruments. The intramedullary nail comprises a main nail body and a push-pull mechanism. The near end of the main nail body is provided with a locking nail hole, the outer side end of the locking nail hole axially limits the rear end of the locking nail penetrating section, the inner side end of the locking nail hole is used for enabling the front end of the locking nail penetrating section to axially move at the near end of the main nail body, and the near end of the main nail body is further provided with an adjusting groove communicated with the inner side end of the locking nail hole. The push-pull mechanism is arranged in the adjusting groove and used for pushing and pulling the front end of the penetrating section of the locking nail along the axial direction of the near end of the main nail body. The intramedullary nail internal fixation external member comprises an intramedullary nail and a locking nail, and an anti-rotation guide groove is axially arranged on the side surface of the proximal end of the locking nail. The head of the locking nail is in a spiral blade or thread type and is provided with a bone cement hole. The utility model discloses an intramedullary nail and intramedullary nail internal fixation external member can be applicable to the different patient of neck shaft angle, satisfies clinical demand, prevents changeing the guide slot through the end embedding that compresses tightly with hold-down mechanism, prevents lock nail circumference and axial motion.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, more specifically say, relate to an intramedullary nail and intramedullary nail internal fixation external member.
Background
The principles of fracture treatment are anatomical reduction, stable internal fixation, protection of blood circulation and early movement. The commonly used fracture treatment methods at present are metal locking bone plate fixation and metal strap locking intramedullary nail fixation. Compared with a metal locking bone fracture plate, the metal interlocking intramedullary nail is more minimally invasive in operation, the metal interlocking intramedullary nail is fixed in the marrow, and the fixed axis is close to the central axis of a long bone, so that the stress shielding effect can be greatly reduced. While intramedullary fixation, allows stress to be transmitted down the cortical bone through the fractured end of the fracture, allowing some stress to stimulate fracture healing. The locking nails at the proximal end and the distal end of the intramedullary nail can improve the anti-rotation performance of the intramedullary nail. At present, various types of intramedullary nails are available on the market for hip fracture, and a locking nail hole is arranged on a main nail body of the intramedullary nail and used for enabling a proximal locking nail to penetrate through and be implanted into a femoral neck. The applicable neck and shaft angles of the intramedullary nail main body are fixed for the same type of the intramedullary nail main body, however, due to individual difference, the neck and shaft angles of different patients can be different, so different types of intramedullary nail main bodies need to be prepared to meet clinical requirements.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an intramedullary nail to solve the technical problem that the main nail body of the single-shaped intramedullary nail existing in the prior art is difficult to be suitable for different patients.
In order to achieve the above object, the present invention adopts the technical solution that an intramedullary nail is provided, comprising:
the main nail body is provided with a locking nail hole for enabling a locking nail to cross pass through at the near end, the inner wall of the outer side end of the locking nail hole is used for limiting the rear end of the locking nail penetrating section in the axial direction of the near end of the main nail body, the inner side end of the locking nail hole is used for enabling the front end of the locking nail penetrating section to axially movably penetrate through the main nail body at the near end, and the near end of the main nail body is also provided with an adjusting groove communicated with the inner side end of the locking nail hole; and
and the push-pull mechanism is arranged in the adjusting groove and used for pushing and pulling the front end of the lock pin penetrating section along the axial direction of the near end of the main pin body.
Further, the push-pull mechanism includes:
the adjusting cap is rotatably connected with the main nail body and is limited in the axial direction of the near end of the main nail body; and
the push-pull piece is arranged in the adjusting groove, the driven end is used for being connected with the front end of the penetrating section of the locking nail, the driving end is in threaded connection with the adjusting cap and used for pushing the front end of the penetrating section to be along with the axial movement of the near end of the main nail body.
Furthermore, the driven end of the push-pull piece is inserted into the inner side end of the lock pin hole and is provided with a limiting hole for the front end of the lock pin penetrating section to penetrate through.
Furthermore, the driving end of the pushing and pulling piece is provided with a containing hole, the adjusting cap is coaxially arranged in the containing hole, and the outer wall of the adjusting cap is in threaded connection with the inner wall of the containing hole.
Further, in the axial direction of the proximal end of the main nail body, the width of the inner side end of the lock nail hole is larger than that of the outer side end of the lock nail hole.
Furthermore, the adjusting cap is provided with a pressing mechanism for pressing the penetrating section of the lock pin on the inner wall of the limiting hole or the inner wall of the lock pin hole.
Further, the pressing mechanism comprises a pressing bolt which is connected to the adjusting cap in a threaded mode and is used for being abutted to the penetrating section.
Further, the push-pull mechanism also comprises a cap for covering the opening of the adjusting groove; the cap is rotatably connected with the adjusting cap and limits the adjusting cap in the axial direction of the proximal end of the main nail body; the adjusting cap is provided with a wrench opening for clamping with a screwing tool; the nut cap is provided with a communicating hole communicated with the wrench opening, and the communicating hole is used for enabling the screwing tool to penetrate through and be clamped with the wrench opening.
Further, the cap includes:
the periphery of the cover plate is in threaded connection with the inner wall of the opening of the adjusting groove; and
the connecting cylinder is arranged in the adjusting groove and connected with the cover plate, and the inner peripheral wall of the connecting cylinder is provided with an annular limiting groove;
the adjusting cap is arranged in the connecting cylinder, and a circumferentially rotating limiting ring embedded in the annular limiting groove is arranged on the periphery of the adjusting cap; the intercommunicating pore runs through the cover plate, the intercommunicating pore, the connecting cylinder inner cavity and the wrench opening are sequentially communicated and used for enabling the screwing tool to be clamped with the wrench opening.
The intramedullary nail provided by the utility model has the advantages that: compared with the prior art, the utility model discloses the intramedullary nail passes through push-and-pull mechanism in the axial of main nail body near-end the lock pin penetrates the front end of section, and the rear end that the lock pin inserted the section is spacing in the axial of main nail body near-end for install the lock pin on the lock pin hole and take place to deflect, thereby the angle of adjustment lock pin can be according to the individual difference adjustment lock pin of patient and the angle of the main nail body when using, make the intramedullary nail of a type can be applicable to the different patient of shaft angle, satisfy clinical demand.
The utility model also provides an intramedullary nail internal fixation external member, be equipped with hold-down mechanism including the above intramedullary nail and locking nail, the head of locking nail is used for penetrating the locking nail is downthehole, be equipped with along the axial on the side of locking nail head and be used for hold-down mechanism's the end embedding that compresses tightly so that locking nail endwise slip and circumference are spacing prevents changeing the guide slot.
Furthermore, the tail part of the locking nail is a spiral blade type or thread type screwing part; the locking nail is also provided with a filling hole which forms an opening on the outer surface of the screwing part.
The utility model provides an intramedullary nail internal fixation external member's beneficial effect lies in: compared with the prior art, the utility model discloses be equipped with above the intramedullary nail internal fixation cover adopts and press solid bolt the intramedullary nail, through push-and-pull mechanism push-and-pull in the axial of main nail body near-end the lock nail penetrates the front end of section, and the rear end of lock nail insertion section is spacing in the axial of main nail body near-end for install the lock nail on the lock nail hole and take place to deflect, thereby the angle of adjustment lock nail can be adjusted according to the individual difference of patient when using, makes the operation reach best effect. In addition, the pressing end of the pressing mechanism can be embedded into the anti-rotation guide groove, so that the locking nail is prevented from moving in the circumferential direction and the axial direction.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is an assembled perspective view of an intramedullary nail and locking nail provided in accordance with an embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a cross-sectional view of the proximal end of the main shank of the intramedullary nail of FIG. 1;
FIG. 4 is a cross-sectional view of the intramedullary nail of FIG. 3 with the locking pin and the proximal end of the main nail body installed;
fig. 5 is a cross-sectional view of the intramedullary nail and locking nail after the forward end of the locking nail insertion section of fig. 3 has been swung up.
Wherein, in the figures, the respective reference numerals:
1-main nail body; 11-a lock pin hole; 12-an adjustment tank; 2-a push-pull mechanism; 21-adjusting the cap; 211-press bolts; 212-wrench opening; 22-a push-pull member; 221-limiting hole; 222-a containment hole; 23-a cap; 231-a cover plate; 232-communicating hole; 233-connecting cylinder; 3, locking the nail; 31-a penetration section; 32-a screw-in portion; 33-anti-rotation guide groove.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 5, an intramedullary nail according to an embodiment of the present invention will be described. An intramedullary nail comprises a main nail body 1 and a push-pull mechanism 2.
The near end of the main nail body 1 is provided with a locking nail hole 11 for enabling the locking nail 3 to cross pass through, the inner wall of the outer side end of the locking nail hole 11 is used for limiting the rear end of the penetrating section 31 in the axial direction of the near end of the main nail body 1, the inner side end of the locking nail hole 11 is used for enabling the front end of the penetrating section 31 to penetrate through and enabling the front end of the penetrating section 31 to move upwards in the axial direction of the near end of the main nail body 1, and the near end of the main nail body 1 is further provided with an adjusting groove 12 communicated with the inner side end of the locking nail.
The push-pull mechanism 2 is arranged in the adjusting groove 12 and is used for pushing and pulling the front end of the penetrating section 31 along the axial direction of the near end of the main nail body 1.
Compared with the prior art, the utility model discloses the intramedullary nail penetrates the front end of section 31 through push-and-pull mechanism 2 push-and-pull in the axial of the main nail body 1 near-end, and the rear end of lock pin 3 insertion section is spacing in the axial of the main nail body 1 near-end, make the lock pin 3 of installing on lock pin hole 11 take place to deflect, thereby adjust the angle of lock pin 3, can adjust the angle of lock pin 3 and the main nail body 1 according to the individual difference of patient when using, make the intramedullary nail of a type can be applicable to the different patient of shaft angle, satisfy clinical demand.
Specifically, the part of the lock pin 3 penetrating into the lock pin hole 11 is a penetrating section 31, the front end of the penetrating section 31 is located in the inner end of the lock pin hole 11, and the rear end of the penetrating section 31 is located in the rear end of the lock pin hole 11. The width of the inner side end of the lock nail hole 11 in the axial direction of the near end of the main nail body 1 is larger than the width of the outer side end of the lock nail hole 11 in the axial direction of the near end of the main nail body 1, the width of the outer side end of the lock nail hole 11 in the axial direction of the near end of the main nail body 1 is the same as the width of the obliquely penetrating section 31 in the axial direction of the near end of the main nail body 1, so that the front end of the penetrating section 31 is limited by the inner wall of the inner side end of the lock nail hole 11, the rear end of the penetrating section 31 can move in the axial direction of the near end of the main nail body 1 in the outer side end of the. More specifically, the nail hole 11 may be formed in a flat tapered shape having a large front end and a small rear end.
The opening of the adjustment groove 12 may be extended to the end surface of the proximal end of the main nail body 1, so that the push-pull mechanism 2 is loaded into the adjustment groove 12 from the proximal end of the main nail body 1, and the operator can operate the push-pull mechanism 2 from the end surface of the proximal end of the main nail body 1. The front end of the penetrating section 31 is pushed and pulled along the axial direction of the near end of the main nail body 1 by the push-pull mechanism 2, so that the angle of the whole locking nail 3 is driven to change.
Referring to fig. 2 to 5, as an embodiment of the intramedullary nail of the present invention, the push-pull mechanism 2 includes an adjusting cap 21 and a push-pull member 22.
The adjusting cap 21 is rotatably connected with the main nail body 1 and is limited in the axial direction of the proximal end of the main nail body 1. The push-pull piece 22 is arranged in the adjusting groove 12, the driven end is used for being connected with the front end of the penetrating section 31, and the driving end is in threaded connection with the adjusting cap 21 and used for pushing the front end of the penetrating section 31 to move along the axial direction of the near end of the main nail body 1.
By rotating the adjusting cap 21, the adjusting cap 21 pushes the driving end of the push-pull member 22 to move axially along the proximal end of the main nail body 1 through threaded connection, and then the driven end of the push-pull member 22 is driven to drive the front end of the penetrating section 31 to move axially along the proximal end of the main nail body 1, so as to adjust the angle of the locking nail 3.
Specifically, the adjustment groove 12 may be a circular hole coaxially provided on the proximal end of the main nail body 1. The lower end of the adjusting groove 12 is communicated with the inner side end of the lock pin hole 11, and the upper end thereof is an opening arranged on the end face of the proximal end of the main pin body 1. The adjusting cap 21 may be coaxially disposed in the adjusting groove 12, and two limiting rings may be disposed on the inner circumference of the adjusting groove 12, and the two limiting rings may axially limit the axial ends of the adjusting cap 21, so that the adjusting cap may be axially limited in the axial direction of the proximal end of the main nail body 1 while rotating in the circumferential direction. It is also possible to provide a cap 23 at the opening of the adjustment groove 12, and to realize the rotation of the adjustment cap 21 relative to the cap 23 by connecting the adjustment cap 21 to the connecting cylinder 233 of the cap 23. The push-pull piece 22 is arranged in the adjusting groove 12 and is positioned below the adjusting cap 21, the upper end of the push-pull piece is a driving end and is connected with the lower end of the adjusting cap 21 through threads, and the axis of the threaded connection is parallel to the axis of the proximal end of the main nail body 1. The lower end of the push-pull member 22 is inserted into the inner end of the nail hole 11 and connected to the front end of the piercing section 31, and more particularly, may be connected to the front end of the piercing section 31 through a hole.
Referring to fig. 2 to 5, as an embodiment of the intramedullary nail of the present invention, the driven end of the push-pull member 22 is inserted into the inner end of the locking hole 11 and has a limiting hole 221 for allowing the front end of the penetrating segment 31 to pass through.
The locking nail 3 penetrates into the limiting hole 221 while penetrating into the locking nail hole 11, so that the front end of the penetrating section 31 is connected with the driven end of the push-pull piece 22, and when the push-pull piece 22 is driven by the adjusting cap 21 to move along the axial direction of the proximal end of the main nail body 1, the driven end of the push-pull piece 22 pushes and pulls the front end of the penetrating section 31 along the axial direction of the proximal end of the main nail body 1, so that the angle of the locking nail 3 is adjusted.
Specifically, the inner diameter of the stopper hole 221 is slightly larger than the outer diameter of the front end of the penetrating section 31, so that the stopper hole 221 does not restrict the rotation of the penetrating section 31.
Referring to fig. 2 to 5, as an embodiment of the intramedullary nail of the present invention, the driving end of the push-pull member 22 is provided with a receiving hole 222, the adjusting cap 21 is coaxially disposed in the receiving hole 222, and the outer wall of the adjusting cap 21 is in threaded connection with the inner wall of the receiving hole 222.
Specifically, the push-pull member 22 is a rod-shaped member that is coaxially disposed within the adjustment groove 12. The upper end of the push-pull member 22 is a driving end coaxially provided with the accommodating hole 222, and the lower end is a driven end inserted into the inner side end of the locking pin hole 11.
Referring to fig. 3 to 5, in an embodiment of the intramedullary nail according to the present invention, the width of the inner end of the nail hole 11 is larger than the width of the outer end of the nail hole 11 in the axial direction of the proximal end of the main nail body 1. Specifically, the nail hole 11 may be a flat cone shape provided with a large inner end and a small outer end.
Referring to fig. 3 to 5, as an embodiment of the intramedullary nail of the present invention, a pressing mechanism for pressing the penetrating section 31 against the inner wall of the limiting hole 221 or the inner wall of the locking hole 11 is disposed on the adjusting cap 21. The pressing mechanism may press and fix the penetrating section 31 on the inner wall of the nail hole 11, or may press and fix the penetrating section 31 on the inner wall of the limiting hole 221.
Referring to fig. 3 to 5, as an embodiment of the intramedullary nail provided by the present invention, the compressing mechanism includes a fixing bolt 211 screwed on the adjusting cap 21 and abutting against the penetrating section 31. The fixing bolt 211 can be coaxially arranged on the adjusting cap 21, and the head of the fixing bolt 211 is screwed into the lock nail hole 11 to abut against the penetrating section 31, so that the penetrating section 31 is pressed on the inner wall of the limiting hole 221 or the inner wall of the lock nail hole 11. The staking bolt 211 may be screwed through the adjustment cap 21 by providing a through hole in the adjustment cap 21 so that a screwing tool can screw the staking bolt 211 through the adjustment cap 21.
Referring to fig. 1 to 5, as a specific embodiment of the intramedullary nail provided by the present invention, the push-pull mechanism 2 further includes a cap 23 for covering the opening of the adjustment groove 12; the cap 23 is rotatably connected with the adjusting cap 21 and limits the adjusting cap 21 in the axial direction of the proximal end of the main nail body 1; the adjusting cap 21 is provided with a wrench opening 212 for clamping with a screwing tool; the cap 23 is provided with a communication hole 232 communicating with the wrench opening 212, and the communication hole 232 is used for passing a screwing tool and engaging with the wrench opening 212.
Specifically, the cap 23 is cylindrical and is coaxially disposed at the proximal end of the main nail body 1, closes the opening of the adjustment groove 12, and is screwed to the proximal end of the main nail body 1 by a thread on the outer periphery. A communication hole 232 is formed through the center axis of the cap 23, so that a screwing tool can be engaged with the wrench opening 212 through the communication hole 232. More specifically, the communication hole 232 may be a hexagon socket for engagement with a screwing tool, and the wrench socket 212 may be a hexagon socket having an inner diameter smaller than that of the communication hole 232, so that the adjustment cap 21 may be screwed by inserting the cap 23 through the communication hole 232 and into the wrench socket 212 with a first-size hexagon socket wrench.
Referring to fig. 1 to 5, as an embodiment of the intramedullary nail provided by the present invention, the cap 23 includes a cover plate 231 and a connecting cylinder 233.
The periphery of the cover plate 231 is in threaded connection with the inner wall of the opening of the adjusting groove 12. The connecting cylinder 233 is disposed in the adjusting groove 12 and connected to the cover plate 231, and an annular limiting groove is disposed on the inner peripheral wall.
The adjusting cap 21 is positioned in the connecting cylinder 233, and a circumferentially rotating limiting ring embedded in the annular limiting groove is arranged on the periphery of the adjusting cap; the communication hole 232 penetrates through the cover plate 231, and the communication hole 232, the inner cavity of the connecting cylinder 233 and the wrench opening 212 are sequentially communicated and used for enabling a screwing tool to be clamped with the wrench opening 212.
Specifically, the cover plate 231 is disposed at the opening of the adjustment groove 12, and the outer periphery thereof is fixed to the side wall of the opening of the adjustment groove 12 by a screw. More specifically, the inner diameter of the opening of the adjustment groove 12 is slightly larger than the inner diameter of the inside of the adjustment groove 12, so that a limiting surface parallel to the radial section is formed at the opening of the adjustment groove 12, and the lower side surface of the cover plate 231 abuts against the limiting surface, so that the axial movement of the cover 23 of the adjustment cap 21 can be limited.
The connecting cylinder 233 is coaxially fixed to the lower side of the cover plate 231, and the upper end of the adjustment cap 21 coaxially penetrates into the lower end of the connecting cylinder 233. The periphery of the adjusting cap 21 is coaxially provided with a convex limiting ring, the inner peripheral wall of the lower end of the connecting cylinder 233 is provided with a concave annular limiting groove, and the limiting ring is embedded into the annular limiting groove, so that the adjusting cap 21 can rotate in the circumferential direction and is limited in the axial direction of the near end of the main nail body 1.
In addition, the sizes of the parts of the intramedullary nail of the embodiment of the present invention can be properly set according to the implanted position, and other mounting holes can be added to mount other locking nails 3, particularly to mount the locking nails in humerus or femur.
Referring to fig. 1, 2, 4 and 5, the present invention further provides an intramedullary nail internal fixation kit, which includes the above intramedullary nail and locking nail 3 with a pressing mechanism, wherein the head of the locking nail 3 is used to penetrate into the locking nail hole 11, and an anti-rotation guide slot 33 is axially arranged on the side surface of the head of the locking nail 3 for embedding the pressing end of the pressing mechanism to make the locking nail 3 circumferentially limit.
Compared with the prior art, the utility model discloses the intramedullary nail that is equipped with the pressure solid bolt 211 more than the intramedullary nail internal fixation spare adopts, pass through push-and-pull mechanism 2 and penetrate the front end of section 31 in the axial of the main nail body 1 near-end, and the rear end of lock pin 3 insertion section is spacing in the axial of the main nail body 1 near-end, make the lock pin 3 of installing on lock pin hole 11 take place to deflect, thereby adjust the angle of lock pin 3, can adjust according to the individual difference of patient when using, make the operation reach the best effect. In addition, the circumferential rotation of the locking pin 3 can be prevented by fitting the pressing end of the pressing mechanism into the rotation preventing guide groove 33.
Specifically, other concrete structures of lock pin 3 can be the same with current lock pin 3, is equipped with a plurality of rectangular guide slots 33 that prevent changeing along the axial in lock pin 3 side, and a plurality of guide slots 33 that prevent changeing encircle the periphery equipartition of lock pin 3. During the use, in the head of locking nail 3 inserted lock nail hole 11, through with 3 circumferential rotation of locking nail to suitable position for during the circumferential direction of the intrameduallary nail is in can imbedding the anti-rotation guide slot 33, prevent 3 circumferential rotation of locking nail, the circumferential direction of self can also be followed to locking nail 3 simultaneously, adjusts the length that 3 nail was nailed into of locking nail, with the angle of locking nail 3 with the length adjustment of nailing after, the fastening bolt 211 of screwing is fixed locking nail 3 with the intrameduallary nail.
Referring to fig. 1, 2, 4 and 5, as an embodiment of the intramedullary nail internal fixation kit provided by the present invention, the tail of the locking nail 3 is a screw blade type or screw thread type screw-in portion 32. The tail part of the locking nail 3 is arranged to be the screwing-in part 32 used for drilling into the bone, so that the locking nail 3 can be directly drilled into the bone by using a tool without operations such as pre-drilling and the like, and the locking nail is convenient to use. The locking pin is also provided with a filling hole forming an opening on the outer surface of the screw-in portion 32. The axis setting of blind rivet 3 is followed to the filling hole, and one end forms the opening on the head of blind rivet 3, and the other end extends to the afterbody of blind rivet 3 to form the opening on the surface of the afterbody of blind rivet 3, can be through filling bone cement to the filling hole, make the afterbody of blind rivet 3 be connected more firmly with the bone.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An intramedullary nail, comprising:
the nail locking device comprises a main nail body (1), wherein a near end of the main nail body (1) is provided with a nail locking hole (11) for enabling a nail (3) to cross pass through, the inner wall of the outer side end of the nail locking hole (11) is used for limiting the rear end of a penetrating section (31) of the nail (3) in the axial direction of the near end of the main nail body (1), the inner side end of the nail locking hole (11) is used for enabling the front end of the penetrating section (31) to axially movably penetrate through the main nail body (1), and the near end of the main nail body (1) is further provided with an adjusting groove (12) communicated with the inner side end of the nail locking hole (11); and
and the push-pull mechanism (2) is arranged in the adjusting groove (12) and is used for pushing and pulling the front end of the penetrating section (31) along the axial direction of the near end of the main nail body (1).
2. Intramedullary nail according to claim 1, characterized in that said push-pull mechanism (2) comprises:
the adjusting cap (21) is rotatably connected with the main nail body (1) and is limited in the axial direction of the near end of the main nail body (1); and
and the driven end of the push-pull piece (22) is connected with the front end of the penetration section (31), and the driving end of the push-pull piece is connected with the adjusting cap (21) in a threaded manner and used for pushing the front end of the penetration section (31) to move along the axial direction of the near end of the main nail body (1).
3. The intramedullary nail according to claim 2, characterized in that the driven end of the push-pull member (22) is inserted into the inner end of the locking nail hole (11) and is provided with a limiting hole (221) for the front end of the penetrating segment (31) to pass through.
4. The intramedullary nail according to claim 2, characterized in that the driving end of the push-pull member (22) is provided with a receiving hole (222), the adjusting cap (21) is coaxially arranged in the receiving hole (222) and the outer wall of the adjusting cap (21) is in threaded connection with the inner wall of the receiving hole (222).
5. The intramedullary nail according to claim 1, characterized in that the axial width of the inside end of the locking nail hole (11) is greater than the axial width of the outside end of the locking nail hole (11) in the axial direction of the proximal end of the main nail body (1).
6. The intramedullary nail according to claim 3, characterized in that the adjusting cap (21) is provided with a compression mechanism for compressing the penetrating segment (31) on the inner wall of the limiting hole (221) or the inner wall of the locking nail hole (11).
7. The intramedullary nail according to claim 6, characterized in that the compression mechanism comprises a compression bolt (211) screwed onto the adjustment cap (21) and intended to abut against the penetrating segment (31).
8. The intramedullary nail according to any one of claims 2 to 4, 6 and 7, characterized in that the push-pull mechanism (2) further comprises a cap (23); the cover cap (23) is rotatably connected with the adjusting cap (21) and limits the adjusting cap (21) in the axial direction of the proximal end of the main nail body (1); a wrench opening (212) for screwing a tool is formed in the adjusting cap (21); the cap (23) is provided with a communication hole (232) communicated with the wrench opening (212), and the communication hole (232) is used for enabling the screwing tool to penetrate through and be clamped with the wrench opening (212).
9. The intramedullary nail according to claim 8, wherein the cap (23) comprises:
the periphery of the cover plate (231) is in threaded connection with the inner wall at the opening of the adjusting groove (12); and
the connecting cylinder (233) is connected with the cover plate (231), and the inner peripheral wall of the connecting cylinder is provided with an annular limiting groove;
the adjusting cap (21) is arranged in the connecting cylinder (233), and a circumferentially rotating limiting ring embedded in the annular limiting groove is arranged on the periphery of the adjusting cap; the communicating hole (232) penetrates through the cover plate (231), the communicating hole (232), the inner cavity of the connecting cylinder (233) and the wrench opening (212) are sequentially communicated and used for enabling the screwing tool to be clamped with the wrench opening (212).
10. Intramedullary nail internal fixation kit, characterized in that it comprises an intramedullary nail and a locking nail (3) according to claim 6 or 7, the head of the locking nail (3) is used to penetrate into the locking nail hole (11), the side of the head of the locking nail (3) is provided with an anti-rotation guide slot (33) along the axial direction for embedding the compressing end of the compressing mechanism; the tail of the locking nail (3) is a spiral blade type or thread type screwing part (32), and the locking nail is also provided with a bone cement hole which forms an opening on the outer surface of the screwing part (32).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920965902.7U CN211704796U (en) | 2019-06-25 | 2019-06-25 | Intramedullary nail and intramedullary nail internal fixation kit |
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| CN201920965902.7U CN211704796U (en) | 2019-06-25 | 2019-06-25 | Intramedullary nail and intramedullary nail internal fixation kit |
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| CN211704796U true CN211704796U (en) | 2020-10-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113397682A (en) * | 2021-07-28 | 2021-09-17 | 中国人民解放军空军军医大学 | Oblique lateral lumbar interbody fusion side way fixing system that resets |
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2019
- 2019-06-25 CN CN201920965902.7U patent/CN211704796U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113397682A (en) * | 2021-07-28 | 2021-09-17 | 中国人民解放军空军军医大学 | Oblique lateral lumbar interbody fusion side way fixing system that resets |
| CN113397682B (en) * | 2021-07-28 | 2022-06-24 | 中国人民解放军空军军医大学 | Oblique lateral lumbar interbody fusion lateral reduction fixing system |
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