Patent ID: 8192368

Claim:
A pressure sensing catheter comprising: a catheter shaft having a proximal end and a distal end, and a first pressure sensing lumen; a first pressure sensing balloon located on the catheter shaft near to the distal end of the catheter shaft, the first pressure sensing balloon being sealed to the shaft so as to define a fluid-tight interior space; a transducer base forming a fluid-tight seal to the proximal end of the catheter shaft, the transducer base including a first well that receives a first pressure sensor assembly therein, the first sensor assembly including a first electrical connection to deliver a first pressure signal to a display and a first sensor membrane in fluid communication with the first pressure sensing lumen that extends from the first sensor membrane through the catheter shaft to a channel through the catheter shaft and into the fluid-tight interior space of the first pressure sensing balloon; and wherein the first sensor assembly is secured in the first well so as to maintain a fluid-tight seal between the first pressure lumen and the first sensor membrane and wherein the first pressure lumen and the fluid-tight interior space of the first pressure-sensing balloon form a passive closed pressure system including a first prefilled charge of fluid therein.