Patent ID: 7481774

Claim:
A pressure sensing device comprising: a pressure transducer; and a pressure transmission catheter comprising: an elongate structure formed to define an internal lumen extending from a distal sensing portion of the pressure transmission catheter to a proximal end of the pressure transmission catheter in fluid communication with the pressure transducer, wherein the pressure transmission catheter is constructed to provide no transfer of fluid between the internal lumen and space outside of the pressure sensing device; a pressure-transmitting liquid contained within the internal lumen; support structure formed to surround the internal lumen at the distal sensing portion to prevent collapse of the internal lumen by lateral pressure forces, the support structure further being formed to define a plurality of openings through the support structure, the plurality of openings comprising at least one opening that is laterally facing; and diaphragm structure formed in relation to the support structure to provide a diaphragm portion for each of the support structure openings.