Patent ID: 9101734
Filing Date: 2015-08-11
Classification: A61B,A61M

Abstract:
1. A force-sensing catheter having a longitudinal axis for use in a vessel comprising: an elongate tubular member having a proximal end and a distal end, the distal end including a deflectable tip portion terminating in a distal tip, the elongate tubular member having a central lumen disposed through the proximal end and two half-cylindrical lumens in the deflectable tip portion; a tip electrode disposed at the distal tip of the deflectable tip portion; a center strut having a rectangular beam section along the longitudinal axis extending from near the proximal end of the tip electrode through the deflectable tip portion of the elongate tubular member and having a first longitudinal edge and a second longitudinal edge and a first side and a second side wherein the width of the first side and the second side are greater than the width of the first longitudinal edge and the second longitudinal edge respectively; wherein the center strut is bonded to the elongate tubular member substantially along entire length of the first longitudinal edge and the second longitudinal edge to form the two half-cylindrical lumen and create an inseparable composite structure from the center strut and the elongate tubular member; and, at least one strain gage, the at least one strain gage affixed to only the first side of the second side of the center strut, the at least one strain gage oriented and configured to detect a bending strain or torsional strain in the center strut for measuring force near the distal end of the tubular member.