The invention provides a method of configuring a pressure-sensing catheter having a proximal end portion, a distal end portion and a plurality of pressure sensors disposed between the proximal end portion and the distal end portion, the method comprising: positioning a biocompatible sheath (302) with at least a portion of the sheath over a portion of the catheter encircling the distal end portion of the catheter with a sliding ring (304) having an opening extending therethrough, an undeformed inner diameter of the opening being about equal to or less than an outer diameter of the catheter and moving the sliding member (304) relative to the catheter in a sliding motion toward the proximal end portion of the catheter, thereby reducing a size of pockets of gas between the sheath and one or more of the plurality of pressure sensors.
