Positioning device for distal locking of intramedullary nail

Abstract

The invention relates to a positioning device for distal locking of an intramedullary nail. The positioning device comprises a positioning mechanism and an adjusting mechanism, wherein the positioning mechanism comprises a first positioning ring and a second positioning ring which are arranged at intervals and are concentrically arranged; a guide needle penetrates through the first positioning ring and the second positioning ring in sequence and is positioned by the first positioning ring and the second positioning ring; the adjusting mechanism comprises a longitudinal rotation assembly used for rotating around a longitudinal axis so as to drive the positioning mechanism to rotate around the longitudinal axis, a transverse rotation assembly used for rotating around a transverse axis so as to drive the positioning mechanism to rotate around the transverse axis, a longitudinal translational component used for driving the positioning mechanism to move along the longitudinal direction and a transverse translational component used for driving the positioning mechanism to move along the transverse direction; the positioning mechanism is detachably or fixedly connected to at least one of the four components; an intersection of the longitudinal axis and the transverse axis is arranged on a connection line of a circle center of the first positioning ring and a circle center of the second positioning ring; an included angle is formed between the plane formed by the longitudinal direction and the transverse direction and the penetrating path of the guide needle. The positioning device is capable of assisting a doctor to quickly and accurately positioning far-end lock holes under the conditions without extra iatrogenic wounds and low radiation frequency.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to a positioning device for locking nails at the distal end of intramedullary nails. Background technique [0002] Intramedullary nailing is a commonly used internal fixation device for the treatment of femoral shaft fractures. During the operation, the femoral intramedullary nail is implanted from the medial pyriform sinus of the greater trochanter, the intramedullary nail is inserted into the bone marrow cavity, and the proximal and distal ends of the intramedullary nail are placed with locking nails. The intramedullary nails are fixed together to control the rotation of the fracture end and increase the firmness of the fixation. Intramedullary nail internal fixation is a closed minimally invasive surgery with a low rate of surgical infection, minimal damage to periosteal blood supply, and a low incidence of refracture. However, because the bone medullary cavity has an inward or outward ...

AI Technical Summary

Problems solved by technology

When using the electronic navigation type intramedullary nail distal aiming device, the magnetic positioning method needs to make an incision at the distal keyhole, and use the detector to find the distal keyhole, which increases additional iatrogenic trauma, and because the probe The needle magnetic block is small, and the induction will fail when the deformation is large, so it is easy to cause misalignment

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