Abstract: A body compatible fiber optic sensor probe is provided. The probe includes at least one optical fiber and the fiber or fibers include at least one sensing region adapted and arranged such that the probe has simultaneously measurable respective optical properties that are responsive to respective different parameters within the body, such properties being dependent upon mechanical strain established in the fiber or fibers in response to said parameters. Such a probe is suitable for invasive medical use.

Abstract: A body compatible fiber optic sensor probe for invasive medical use is provided. The probe includes at least one sensing location at which the fiber is configured to provide at least one detectable changeable optical property responsive to strain within the fiber, and at least one sensing element which undergoes a volumetric change in response to an in body parameter to be sensed. The sensing element is coupled to the fiber in such a way that the volumetric change induces strain within the fiber so as to vary the detectable optical property or properties.