Optical fiber pressure sensor guidewire

An apparatus for insertion into a body lumen, the apparatus comprising:

• an optical fiber pressure sensor including:
• a first optical fiber anchor, to which a first portion of an optical fiber is secured;
• a second optical fiber anchor, to which a second portion of the optical fiber is secured;
• and
• a gasket longitudinally arranged between the first and second anchors and including a passage through which a third portion of the optical fiber passes, the gasket being more elastic or compliant than the first and second anchors,
• wherein the first and second anchors and the gasket are arranged to use the elastic or compliant nature of the gasket to allow at least one of longitudinal stretching or compression of the optical fiber between the first and second anchors to sense pressure at an internal location within a human body.

An apparatus for insertion into a body lumen, the apparatus comprising:

• a guidewire including a solid core wire having an outer surface, a portion of the outer surface comprising a groove directly on the outer surface of the guidewire, at least a portion of the guidewire being sized, shaped, or otherwise configured to be inserted into a human body;
• an optical fiber configured to communicate light between a location outside of the human body and a portion of the optical fiber that is to be located at or near an internal location within the human body at which a pressure is to be measured;
• and
• an optical fiber pressure sensor coupled to the optical fiber, the optical fiber pressure sensor including:
• a first optical fiber anchor, to which a first portion of an optical fiber is secured;
• a second optical fiber anchor, to which a second portion of the optical fiber is secured;
• and
• a gasket longitudinally arranged between the first and second anchors and including a passage through which a third portion of the optical fiber passes, the gasket being more elastic or compliant than the first and second anchors,
• wherein the first and second anchors and the gasket are arranged to use the elastic or compliant nature of the gasket to allow at least one of longitudinal stretching or compression of the optical fiber between the first and second anchors to sense pressure at the internal location within the human body.