Ffr sensor head design that minimizes stress induced pressure offsets

A pressure sensing medical device, comprising:

• a guidewire including an elongate tubular member having a lumen extending therethrough, the tubular member being movable between a generally straightened position and a deflected position;
• and
• an optical pressure sensor attached at a distal end of a fiber optic extending longitudinally within the lumen, the pressure sensor being disposed within a distal portion of the tubular member;
• wherein the pressure sensor includes a pressure-sensitive membrane disposed on a distal end thereof;
• wherein the pressure sensor further includes one or more contact members capable of providing a contact point between the one or more contact members and an inner surface of the tubular member when in the deflected position, the contact point being axially spaced apart from the membrane along a longitudinal axis of the pressure sensor.

A pressure sensing medical device, comprising:

• a guidewire including an elongate tubular member having a lumen extending therethrough, the tubular member being movable between a generally straightened position and a deflected position;
• and
• an optical pressure sensor attached at a distal end of a fiber optic extending longitudinally within the lumen, the pressure sensor being disposed within a distal portion of the tubular member;
• wherein the pressure sensor includes a pressure-sensitive membrane disposed on a distal end thereof;
• wherein the pressure sensor further includes one or more contact members capable of providing a contact point between the one or more contact members and an inner surface of the tubular member when in the deflected position such that the membrane is spaced apart from the inner surface, the contact point being axially spaced apart from the membrane along a longitudinal axis of the pressure sensor.