US Patent 10258240 Optical fiber pressure sensor

In an example, an apparatus includes an elongated assembly, at least a portion of which is sized, shaped, or otherwise configured to be inserted into a human body to measure a physiological parameter at an internal location within the body. The elongated assembly can include an elongated member. The elongated assembly can include an optical fiber pressure sensor, located at a distal portion of the elongated member. The elongated assembly can include a housing disposed about the optical fiber pressure sensor. The elongated assembly can include a guidewire tube, coupled to the housing, the guidewire tube defining a receptacle sized and shaped to accept a guidewire to permit the distal portion of the elongated member to slide along the guidewire during insertion of the elongated assembly into the human body.