Patent ID: 8932303
Filing Date: 2015-01-13
Classification: A61B

Abstract:
1. An instrument for attachment and insertion of a screw assembly into a surgical site, comprising: a housing including a movable hub rotatable relative to the housing; an attachment shaft that includes a proximal end for coupling to the housing around the hub and a distal end with a resiliently flexible portion for selectively attaching to a receiver of the screw assembly; and a drive shaft configured to pass within the attachment shaft that includes a proximal end for selectively engaging the hub and a distal end with a driving feature for driving a head of the screw assembly; wherein the flexible portion includes a first thread for engaging a second thread of the receiver of the screw assembly, wherein in a first expanded configuration, the first thread is capable of threaded interaction with the second thread; and wherein in a second configuration the first thread is capable of sliding over the second threads to be inserted into the second threads.