Development of manual, electric, positive, reversed and calibrated trephine

Abstract

The invention discloses an orthopaedic internal fixation withdrawal instrument: manual, electric, positive, reversed and calibrated trephine, which is composed of an electric trephine, a handle connecting rod (1) and a sleeve (3), wherein the sleeve includes calibrations thereon, the connecting rod is skid-proof in a triangular shape and is provided with a locking opening (2) which achieves locking by means of the connection with a steel ball portion of the handle, the jagged lower part of the sleeve (3) consists of four modes including ultrathin micro invasion, thickened anti-clamping tooth, positive and reversal, the handle is composed of a grip (4) and a locking cylinder (5), the locking cylinder (5) is internally provided with a locking steel ball (6), a pressing piece (7) and a spring (8), the pressing piece (7) presses the steel ball (6) into a steel ball slot (9) while locking so as to fix the locking port of the connecting rod of the trephine and further realize locking, and the pressing piece (7) slides downwards while unlocking so that the steel ball (6) can be bounced out of the steel ball slot along with the pressure inside the cylinder to realize decompression; the trephine has the advantages of good safety, small invasion, multiple purposes in one handle, locking, fast replacement and the like.

Description

technical field [0001] The invention relates to hand, electric, forward, reverse and graduated trephine, which belongs to orthopedic internal fixation and removal device. Background technique [0002] The application of screw fixation after limb fractures is currently the most commonly used clinical internal fixation method. Some screws remain in the body for too long. Therefore, during functional exercises or labor without reasonable guidance, due to the stress shielding effect, some screws bear huge stress. It is easy to cause fracture, especially the application of titanium alloy, which increases the tissue compatibility, and the screw is tightly combined with the bone, so it is possible to twist the nut and the screw body when the screw is taken out, so the broken nail is the most common clinical case. More common, the current common removal method is manual trephine, one-way and no scale, not only the technology is backward, time-consuming, laborious, traumatic, and the...

AI Technical Summary

Problems solved by technology

[0002] The application of screw fixation after limb fractures is currently the most commonly used clinical internal fixation method. Some screws remain in the body for too long. Therefore, during functional exercises or labor without reasonable guidance, due to the stress shielding effect, some screws bear huge stress. It is easy to cause fracture, especially the application of titanium alloy, which increases the tissue compatibility, and the screw is tightly combined with the bone, so it is possible to twist the nut and the screw body when the screw is taken out, so the broken nail is the most common clinical case. More common, the current common removal method is manual trephination, one-way and no scale, not only the technology is backward, time-consuming, laborious, traumatic, and there is a danger of deep screw screw, so a safe and labor-saving broken nail removal tool is urgently needed

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