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CN-224220213-U - Femur intramedullary nail

CN224220213UCN 224220213 UCN224220213 UCN 224220213UCN-224220213-U

Abstract

The utility model discloses a femoral intramedullary nail, which comprises a main nail, wherein the main nail comprises a distal end section, a proximal end section and a connecting piece for connecting the distal end section and the proximal end section, the connecting piece comprises a first section and a second section, the first section is in threaded connection with the distal end section, and the second section is in threaded connection with the proximal end section. The utility model adjusts the upper and lower parts of the proximal femur to achieve proper matching angles by the relative rotation of the proximal segment and the distal segment, has simple structure, is specially used for the proximal rotation correction bone setting treatment of children, allows controlled rotation correction, and is mainly used for the proximal fracture, deformity healing, bone nonunion and deformity.

Inventors

  • LIU LIYA
  • SUN YINGZHI
  • CUI LUWEI
  • XU SHUFU

Assignees

  • 天津正天医疗器械有限公司
  • 北京纳通医疗科技控股有限公司

Dates

Publication Date
20260512
Application Date
20250207

Claims (10)

  1. 1. The femoral intramedullary nail is characterized by comprising a main nail, wherein the main nail comprises a distal end section, a proximal end section and a connecting piece used for connecting the distal end section and the proximal end section, the connecting piece comprises a first section and a second section, the first section is in threaded connection with the distal end section, and the second section is in threaded connection with the proximal end section.
  2. 2. The femoral intramedullary nail of claim 1, wherein the proximal end face of the distal section and the distal end face of the proximal section are provided with circumferentially evenly distributed first and second splines, respectively, the first and second splines intermesh.
  3. 3. The femoral intramedullary nail of claim 2, wherein the central angle of a single one of said first flutes and the central angle of a single one of said second flutes are equal and in the range of 5 ° -10 °.
  4. 4. The femoral intramedullary nail of claim 1, wherein the proximal end of the distal section and the distal end of the proximal section are provided with first and second axial threaded bores, respectively, and the first and second sections of the connecting member are threadably coupled to the first and second threaded bores, respectively.
  5. 5. The femoral intramedullary nail of claim 4, wherein the first threaded bore and the second threaded bore have the same pitch.
  6. 6. The femoral intramedullary nail of claim 4, wherein the first threaded bore and/or the second threaded bore are stepped bores.
  7. 7. The femoral intramedullary nail of claim 4, wherein the proximal end of the first threaded bore and the distal end of the second threaded bore meet at the same diameter.
  8. 8. The femoral intramedullary nail of claim 1, wherein a proximal end face of the proximal section is square.
  9. 9. The femoral intramedullary nail of claim 2, wherein an outer wall of the proximal section is provided with a groove for mating with a locking nail.
  10. 10. The femoral intramedullary nail of claim 1, wherein a distal end of the distal section tapers to a tip.

Description

Femur intramedullary nail Technical Field The utility model relates to the technical field of medical appliances, in particular to a femoral intramedullary nail. Background An intramedullary nail belongs to an orthopedic internal fixation device in a medical device, and the structure of the intramedullary nail is provided with an intramedullary nail rod. The intramedullary nail is the first choice internal fixation of the femoral shaft fracture, the needle insertion point of the intramedullary nail is positioned at the pyriform fos at the inner side of the femoral trochanter, the fracture part is easy to rotate in the implantation process of the intramedullary nail, the postoperative rotation deformity is caused, at the moment, the distal and proximal fixing screws are required to be withdrawn for re-fixation, the time and the labor are consumed, and the pain is also increased for patients. Disclosure of utility model The present application aims to provide a femoral intramedullary nail to solve the problems set forth in the background art. In order to achieve the above purpose, the present application provides the following technical solutions: The intramedullary nail for the femur comprises a main nail, wherein the main nail comprises a distal end section, a proximal end section and a connecting piece for connecting the distal end section and the proximal end section, the connecting piece comprises a first section and a second section, the first section is in threaded connection with the distal end section, and the second section is in threaded connection with the proximal end section. Optionally, a first tooth groove and a second tooth groove which are uniformly distributed in the circumferential direction are respectively arranged on the proximal end face of the distal end section and the distal end face of the proximal end section, and the first tooth groove and the second tooth groove are mutually meshed. Optionally, the central angle of each first tooth slot is equal to the central angle of each second tooth slot, and the angle range is 5-10 degrees. Optionally, the proximal end of the distal section and the distal end of the proximal section are provided with an axial first threaded hole and an axial second threaded hole, respectively, and the first section and the second section of the connecting member are in threaded connection with the first threaded hole and the second threaded hole, respectively. Optionally, the pitch of the first threaded hole and the second threaded hole is the same. Optionally, the first threaded hole and/or the second threaded hole are stepped holes. Optionally, the proximal end of the first threaded bore and the distal end of the second threaded bore are of the same diameter. Optionally, the proximal end face of the proximal section is square. Optionally, the outer wall of the proximal section is provided with a recess for mating with a locking pin. Optionally, the distal end of the distal section tapers to a tip. In summary, the utility model has the technical effects and advantages that the upper and lower parts of the proximal femur to be corrected are adjusted to reach proper matching angles through the relative rotation of the proximal intramedullary nail end and the distal intramedullary nail end, the structure is simple, the utility model is specially used for the rotation correction bone setting treatment of the proximal child end, and the utility model allows controlled rotation correction and is mainly designed for the proximal fracture, deformity healing, bone nonunion and deformity. Drawings In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic view showing the structure of a femoral intramedullary nail according to an embodiment of the present utility model; FIG. 2 is a view showing a state of use of the femoral intramedullary nail according to one embodiment of the present utility model; FIG. 3 is a schematic view of a connecting member according to an embodiment of the utility model; FIG. 4 is a second schematic structural view of a connecting member according to an embodiment of the present utility model; FIG. 5 is a schematic diagram of a third embodiment of a connector according to the present utility model; FIG. 6 is a schematic view illustrating a first slot structure according to an embodiment of the present utility model; FIG. 7 is a schematic diagram of a second tooth slot according to an embodiment of the present utility model. Wherein: 1. The device comprises a proximal end section, 11, a second threaded hole, 12, a second