Fiber Bragg grating multi-point pressure sensing guidewire with birefringent component

摘要

A system and method are presented for detecting and measuring pressure within a region of a body lumen or vessel. The pressure sensing system includes a light source for transmitting light through a pathway of polarization maintaining fiber optic wire. A distal portion of the polarization maintaining fiber optic wire is engaged to and extends along a guidewire. The distal portion of the fiber optic wire includes pressure sensing station(s) made up of fiber Bragg gratings (FBG). The light transmitted to and reflected from the FBGs on the two polarization modes of the polarization maintaining fiber optic wire can be analyzed to provide one or more pressure values.