Patent ID: 6935999

Claim:
A method for measuring pressure in a bodily vessel, comprising the steps of: a) inserting a balloon catheter into the bodily vessel, the balloon catheter comprising a balloon membrane, a tip, a catheter pressure sensor connected to the balloon catheter, an outer tube, a fluid-filled pressure measurement system and a proximal fitting connected to a proximal end of the outer tube, a distal end of the balloon membrane being connected to the tip, the fluid-filled pressure measurement system comprising a fluid source connected to the proximal fitting via a fluid source line, and a fluid pressure sensor for measuring pressure in the fluid source line; b) measuring pressure in the bodily vessel via the fluid pressure sensor and via the catheter pressure sensor; and c) outputting the catheter pressure sensor measurement adjusted by the difference between the catheter pressure sensor measurement and the fluid pressure sensor measurement if the fluid pressure sensor measurement is greater or less than the catheter pressure sensor measurement by a predetermined amount, otherwise outputting the catheter pressure sensor measurement.