A nail removal device for orthopedics

Abstract

The invention discloses a nail taking device for the orthopedics department. The nail taking device comprises a support, a screw, a composite sleeve, a distraction loop bar and a distraction rod, wherein a plurality of supporting legs are arranged on the support, the screw is installed in the support, the screw is a hollow cylindrical pipe, vertical grooves are symmetrically formed in the inner wall of one end of the screw, a hollow screw head is arranged at the other end of the screw, a screw sleeve is installed on the screw head, connecting rods are symmetrically hinged to an end of the screw head, clamping pieces are arranged at the ends of the connecting rods, and connecting threads are arranged on the outer wall, connected with the screw head, of the screw; the composite sleeve is installed on the screw, protruding strips are installed in sliding grooves, and threads on the inner wall of a connecting sleeve are connected with the connecting threads in a matched mode; the distraction loop bar is mounted in the screw; and the distraction rod is installed in the distraction loop bar. By increasing acting force points acting on bone nails, the bone nails can be taken out more easily and are not prone to loosen, slip and break.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a nail removal device for orthopedics. Background technique [0002] In orthopedic surgery, steel plates and bone nails are usually used to reset and fix the bone fragments at the fracture site, so that the dislocated bone fragments are closely connected again under the action of the steel plates and bone nails, and after a long period of postoperative growth, The broken bone fragments grow calluses and heal together again. The internal fixation needs to be removed 1-2 years after the operation to avoid rejection. The bone screws used include hollow bone screws, self-tapping bone screws, and non-self-tapping bone screws. Screws, etc., use the bone screw extractor to clamp the bone screw cap and rotate to take out the bone screw during the whole process of taking out. Small, easy to break the bone screw, it is difficult to take out the bone screw completely, and it is mor...

AI Technical Summary

Problems solved by technology

[0002] In orthopedic surgery, steel plates and bone nails are usually used to reset and fix the bone fragments at the fracture site, so that the dislocated bone fragments are closely connected again under the action of the steel plates and bone nails, and after a long period of postoperative growth, The broken bone fragments grow calluses and heal together again. The internal fixation needs to be removed 1-2 years after the operation to avoid rejection. The bone screws used include hollow bone screws, self-tapping bone screws, and non-self-tapping bone screws. Screws, etc., use the bone screw extractor to clamp the bone screw cap and rotate to take out the bone screw during the whole process of taking out. Small, easy to break the bone screw, it is difficult to take out the bone screw completely, and it is more difficult to take out the broken bone screw, and it is easy to cause re-injury at the fracture site; when the hollow bone screw is taken out, only the stress point acts on the bone screw cap It is easier to break the hollow bone screw; the currently used bone screw remover only fixes the fixing cap, which is prone to loosening and slipping during the removal process, making it difficult to remove the bone screw

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