Patent ID: 7559924
Filing Date: 2009-07-14
Classification: A61M,A61N

Abstract:
1. A method comprising: inserting a substance delivery system into a body, the substance delivery system comprising a guide catheter and a needle catheter, the needle catheter having a needle movable between a retracted position and a deployed position, a needle shaft assembly, an elastically deformable element coupled to a portion of the needle shaft assembly, and a release mechanism comprising a first latch that releasably engages the elastically deformable element when the elastically deformable element is in a position which corresponds to the needle being in the retracted position and a second latch that releasably engages the first latch, wherein the first latch is prevented from releasing the elastically deformable element while the second latch is engaged with the first latch; moving the substance delivery system to a desired position within the body; setting the release mechanism to hold the needle in the retracted position; releasing the release mechanism when the substance delivery system is in a desired position for insertion of the needle into a portion of the body.