Device for adjusting relative positions of intramedullary nail and positioning rod

Abstract

A relative position adjuster for an intramedullary nail and a positioning rod belongs to the technical field of orthopedic medical devices, and is used for adjusting the relative position of the intramedullary nail and the positioning rod of an intramedullary nail aiming frame after being inserted. The connecting plate of the present invention is fixedly connected with the guide rod of the intramedullary nail aimer, the ejector rod passes through the guide rod and the connecting plate, and the front end of the ejector rod abuts against the lateral cortex of the femur, and by pushing the ejector rod forward, the femur The intramedullary nail and the intramedullary nail move inward as a whole, and the C-arm fluoroscopy confirms that the T-shaped positioning rod is located directly above the main nail of the intramedullary nail, and the rod operation is performed, and then the distal locking nail is fixed according to the conventional operation. The invention is simple in structure and easy to operate, and can adjust the position of the inserted intramedullary nail, so that the lower end of the T-shaped positioning rod can be accurately pushed against the midpoint of the upper end surface of the intramedullary nail, ensuring the position and direction of the nail hole of the distal locking nail correct. The invention solves the long-term difficult problems in orthopedic surgery, effectively shortens the operation time, speeds up the operation process, and ensures the quality of the operation.

Description

technical field [0001] The invention relates to a device for adjusting the relative position of an intramedullary nail and a positioning rod of an intramedullary nail aiming frame after being inserted, and belongs to the technical field of orthopedic medical instruments. Background technique [0002] Intramedullary nails can be used to treat various types of stable or unstable fractures of the femur and tibia. The main treatment for shaft fractures. When implanting the intramedullary nail, the nail entry point must be selected accurately, otherwise it will lead to changes in the alignment of the fracture and the position of the intramedullary nail in the intramedullary, resulting in inaccurate insertion of the distal locking nail. Before inserting the distal locking nail, the intramedullary nail aiming frame should be used for manipulation. The intramedullary nail aiming frame is an existing instrument, and it is made up of a handle, a guide rod, an aimer and a T-shaped po...

AI Technical Summary

Problems solved by technology

However, during the actual operation, because the distal medullary cavity is relatively thick, the intramedullary nail is prone to drift left and right. The lower end of the T-shaped positioning rod cannot vertically support the upper end of the intramedullary nail, but slides down on both sides. In this case, the T-shaped positioning rod cannot be accurately inserted, and the position and direction of the nail hole of the distal locking nail of the intramedullary nail cannot be accurately determined, so the subsequent operation of inserting the distal locking nail cannot be completed.

At present, during the operation, it is difficult to handle when the lower end of the T-shaped positioning rod of the intramedullary nail sight deviates from the intramedullary nail. Only by adjusting the handle of the intramedullary nail sight can the position of the intramedullary nail be adjusted Adjustment, the adjustment is very inconvenient, and the adjustment effect is not ideal (please revise and supplement to show the problems existing in the existing technology, highlight the superiority of this project, and meet the requirements of the inventiveness of the invention), making the adjustment of the intramedullary nail and the pulp The relative position of the positioning rod of the inner nail aiming frame has become a thorny problem in this kind of operation, which needs to be solved urgently

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