Cannula system for hard tissue implant delivery

摘要

This is a cannula system for hard tissue implant material delivery. A cannula having at least two stages is described. A proximal section has one set of outer and inner diameter and a distal section has smaller outer and/or inner diameters. The length of each section is preferably adapted for use in performing percutaneous vertebroplasty. The cannula preferably has a section inner 13 gauge diameter and another section with an inner 11 gauge diameter. Internal and/or external transition regions may be provided between the sections of different diameters. For use in accessing a site, preferably a 13 gauge stylet is received in a lumen of the cannula. Interlocking or complimentary handle portions are preferably associated with each of the stylet and cannula.