Impactor for use in orthopaedics

摘要

The impactor for fitting a spherical head on the shaft of a hip replacement joint comprises a tubular casing (2) containing a weight (3) mounted on an axial shaft (9). When this is raised it compresses a spring (4) at the top of the sleeve and can be locked in place by a catch (6) which swivels into a groove (5) in the weight. When the catch is released the weight falls and strikes a socket (11) at the base of the tube.