Cup Impactor

摘要

An orthopedic cup impactor for use in minimally invasive hip replacement surgical procedures is described. The impactor comprises a handle, residing at a proximal end portion, and a cup engagement sub-assembly located at a distal portion. A shaft resides therebetween. The shaft portion is designed with a large radius of curvature that provides added clearance when inserting the impactor in obese patients. The cup engagement sub-assembly features a drive train that comprises a series of “U” and “H” joints deigned to provide full rotational motion. The drive train may be designed to be removable from the cup impactor to provide more efficient and thorough cleaning.

主权项

1. An orthopedic cup impactor, which comprises:
a) a handle extending along a handle longitudinal axis from a proximal handle end to a distal handle end; b) a curved shaft extending from a proximal curved shaft end to a distal curved shaft end, wherein the proximal curved shaft end is connected to the distal handle end; c) a cup engagement portion extending along a cup engagement portion longitudinal axis from a distal end of the cup engagement portion to a proximal end of the cup engagement portion connected to the distal curved shaft end, wherein an apex of the curved shaft is intermediate where the proximal curved shaft end is connected to the distal handle end and where the distal curved shaft end is connected to the proximal end of the cup engagement portion; d) a drive train at least partially disposed within the curved shaft and within the cup engagement portion, the drive train comprising a proximal drive train end extending to a distal drive train end; e) wherein the cup engagement longitudinal axis is parallel to the handle longitudinal axis, and f) wherein an imaginary line extending perpendicularly from the cup engagement portion longitudinal axis intersects the handle longitudinal axis and then the apex such that the curved shaft apex is a greater distance from the cup engagement longitudinal axis than from the handle longitudinal axis, and g) wherein the proximal drive train end is adapted for releasable connection to a source of rotary motion so that rotational movement imparted to the drive train in a first direction causes the distal drive train end to engage with an implant and rotational movement imparted to the drive train in a second, opposite direction causes the distal drive train end to disengage from the implant.