SURGICAL DRILL GUIDE

摘要

A drill guide is disclosed in which a cylindrical guide tube is secured to a handle so that it may not be easily longitudinally moved in either direction without the user engaging a thumb activated locking mechanism. The cylindrical guide tube passes through a conically tapered cylindrical bore within the drill guide handle and a similarly tapered split collet is interposed concentrically between the exterior of the cylindrical guide tube and the interior of the bore. The collet is provided with a plurality of longitudinally extending lobes which are sufficiently resilient that movement of the collet to its proximal-most position causes the lobes to squeeze inwardly against the cylindrical guide tube. frictional engagement between the collet lobes and the guide tube prevents the latter from moving until the collet is moved distally to release pressure on the lobes. The collet is normally biased proximally by a leaf spring attached to the drill guide handle and a thumb activated lever is provided to move the leaf spring distally to release pressure on the lobes and unlock the cylindrical guide tube.