The invention belongs to the field of
medical instruments, and relates to a
femoral shaft fracture internal fixing instrument, which comprises a locking steel plate and a collimation
assembly component of the locking steel plate. The locking steel plate comprises a steel plate, a single lock, a combination lock and lock pins, and the collimation
assembly component comprises a single lock collimation fixing apparatus, a combination lock collimation fixing apparatus and auxiliary components including bone nails, a bone nail positioning drawing hook, a combined screwdriver and the like. An arc which corresponds to a forward physiological curve of the
femur of a patient is longitudinally designed on the steel plate, an arc which corresponds to the
transverse diameter of the
femur is transversely designed at a position, which is close to a
femur surface, of the steel plate, arc-shaped curved surfaces are symmetrically and uniformly distributed on side surfaces of the steel plate, and the steel plate conforms to an arc line of the femur, is placed in the middle of a fracture portion, and contacts with the femur in a limited manner. The combination lock is designed on the inner side of the femur and across a
fracture line, the single lock is designed far away from the
fracture line, collimation, fixation, drilling and assembling are carried out by the collimation
assembly component, and operation is simple and fast. The
femoral shaft fracture internal fixing instrument has the advantages that fixation is stable, additional fixation is not required after
surgery, and the
femoral shaft fracture internal fixing instrument can be used for early-stage
functional exercises and is favorable for fracture healing. After fracture healing, a fixing object in the femur can be detached conveniently.