	US 7,553,319 B2
	Auto-injector apparatus and methods for sealing a vascular puncture
Celso J. Bagaoisan, Union City, Calif. (US); Nicanor Domingo, Brisbane, Calif. (US); Farhad Khosravi, Los Altos Hills, Calif. (US); and Suresh S. Pai, Mountain View, Calif. (US)
Assigned to AccessClosure, Inc., Mountain View, Calif. (US)
Filed on Mar. 22, 2004, as Appl. No. 10/806,934.
Application 10/806934 is a continuation in part of application No. 10/454362, filed on Jun. 04, 2003.
Prior Publication US 2004/0267193 A1, Dec. 30, 2004
Int. Cl. A61B 17/08 (2006.01); A61M 31/00 (2006.01)

U.S. Cl. 606—214 [604/507]

16 Claims

1. A method for delivering a sealing compound from a delivery device comprising a pair of barrels including outlets and a plunger assembly slidable within the barrels from a first position to a second position for injecting components out of the barrels through the outlets, the method comprising:

providing sealing components in the barrels with the plunger assembly in the first position;

activating an actuator coupled to a spring mechanism to release the spring mechanism, whereupon the spring mechanism directs the plunger assembly towards the second position to inject the sealing components out of the barrels;

introducing a delivery sheath into a puncture through tissue; and

connecting the barrels to a lumen of the delivery sheath,

wherein the actuator is activated after the delivery sheath is introduced into the puncture such that the sealing components are injected from the barrels through the lumen of the delivery sheath and into the puncture, and

wherein a retraction assembly is coupled to the delivery sheath, and wherein the plunger assembly triggers a release of the retraction assembly as the plunger assembly slides towards the second position, whereupon the retraction assembly automatically withdraws the delivery sheath at least partially from the puncture to fill at least a portion of the puncture with the sealing components.