Patent ID: 8323248
Filing Date: 2012-12-04
Classification: A61M

Abstract:
1. A method of delivering medical fluid to a tissue, the method comprising: navigating a delivery catheter body through vasculature to a fixation site of a targeted tissue; fixing the delivery catheter body to the fixation site using a fixation member extending from a distal end of the delivery catheter body; advancing a flexible needle out from a distal port located on the delivery catheter body, the flexible needle extending away from the delivery catheter body central axis and along a first pathway within the targeted tissue; measuring a first impedance between the flexible needle and an electrode of the delivery catheter after advancing the flexible needle out from the distal port; advancing a second flexible needle out from a second distal port located on the delivery catheter body; measuring a second impedance using the second flexible needle after advancing the second flexible needle out from the second distal port; verifying a position of the delivery catheter with respect to the fixation site by comparing the first impedance and the second impedance; detecting a canted distal end of the delivery catheter body with respect to a surface of the tissue fixation site in response to the measured impedance; adjusting the delivery catheter body position in response to detecting the canted distal end; and, delivering medical fluid through the needle to the targeted tissue along the first and second pathways.