A magnetic navigation locking intramedullary nail system

Abstract

The invention discloses a locking intramedullary nail system, which mainly includes an aiming mechanism and a monitoring mechanism. needle, U-shaped directional card, the indicating mechanism mainly includes an indicator, an indicator bracket, a magnetic rod, and a magnetic rod bracket. When the handle is placed horizontally, the magnetic rod bracket fixes the magnetic rod above the handle, and the magnetic rod The far end is provided with a magnet, and the indicator is provided with a transparent shell, and a pointer is arranged in the shell, and the indicator bracket is used to fix the indicator in front of the magnet at the far end of the magnetic rod with a certain gap, so that the pointer is attracted by the magnet and suspended on the place. In the middle of the shell, before drilling, first adjust the position of the indicator housing so that the pointer is in the central position, and monitor the indicator during drilling to prevent drilling deviation. The system is simple in structure, flexible and convenient in operation, accurate in targeting and positioning, and can be monitored in real time during drilling operations.

Description

technical field [0001] The invention relates to the technical field of medical instruments for clinical bone setting. Background technique [0002] At present, in the treatment of patients with tubular fractures, interlocking intramedullary nail internal fixation technology is widely used clinically, and the installation of the distal locking nail of the intramedullary nail is the key link of this technology. The position of the distal nail hole of the intramedullary nail The accuracy of positioning directly affects the difficulty and quality of surgery. There are several ways to target and locate the distal nail hole of the intramedullary nail that are commonly used in clinical practice. A large amount of radiation is produced, causing harm to medical staff and patients. The 2nd, adopt the position-limiting aiming technology of locating bar, the patent No. 02267978.2 " with locking intramedullary nail far-end nail hole locating device " designed by the inventor more typic...

AI Technical Summary

Problems solved by technology

There are several ways to target and locate the distal nail hole of the intramedullary nail that are commonly used in clinical practice. Generate a large amount of radiation, causing harm to medical staff and patients

The 2nd, adopt the position-limiting aiming technology of locating bar, the patent No. 02267978.2 " with locking intramedullary nail far-end nail hole locating device " designed by the inventor more typically, its structural characteristic is to install an additional on the locating bar Although the limit device that limits the swing of the intramedullary nail plays a certain role in aiming, it needs to add a drill hole in the bone tissue, which not only requires many steps, but also causes additional trauma to the patient.

The third is to adopt magnetic force aiming and positioning technology. The patent No. 200420039024.X designed by the inventor is "automatic indicator for locking intramedullary nail distal nail hole". A magnetic aiming indicator is installed in the positioning hole of the intramedullary nail, and it cooperates with the probe with a magnet inserted in the intramedullary nail for aiming and positioning. This technology improves the accuracy of aiming at the distal nail hole of the locking intramedullary nail, but Its shortcoming is that it has no indication for the phenomenon of hole drilling deviation caused by the following reasons, that is, when the drill bit has just touched When the bone is drilled, the drill bit slips, so that the drilling direction is deflected, and it is crossed with the axis direction of the distal hole of the intramedullary nail, so that the hole is drilled off.

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