Graft delivery system and methods thereof

摘要

The present invention relates to minimally invasive graft delivery systems and devices. The systems and devices provide a means to deliver graft material minimally invasively, such as to a spacer within a disc space. A particular system can include a cannula, a syringe and an extrusion tool. The extrusion tool can be used to extrude material from the cannula and syringe, and can have multiple modes of operation to accommodate the extrusion of materials of different viscocities.

主权项

1. A system for spine surgery comprising:
a spacer configured to be positioned in a disc space, wherein the spacer includes an opening for receiving graft material therein; and a minimally invasive delivery system for delivering material in and/or around the spacer comprising:
a cannula comprising a proximal portion and a distal portion and a flexible shaft extending therethrough, wherein the flexible shaft includes an opening extending therethrough;a syringe threadingly attached to the proximal portion of the cannula, wherein the syringe includes a channel for receiving material therethrough and a removable handle; andan extrusion tool attached to the syringe, wherein the extrusion tool comprises a push handle, a threaded shaft for assisting in the extrusion material out of the syringe, and a receiving body,wherein the threaded shaft extends through the receiving body, and wherein the receiving body comprises an engagement mechanism including an opening therethrough, wherein the threaded shaft is capable of passing through the opening of the engagement mechanism in a first mode and a second mode, wherein in the first mode the threaded shaft can be pushed through the opening in the engagement mechanism without threading and in the second mode the threaded shaft can be pushed through the opening in the engagement mechanism with threading, andwherein the engagement mechanism includes a spring component that engages at least a slot in the receiving body in the first mode and is configured to be disengaged from the slot in the second mode.