CPC A61B 18/1492 (2013.01) [A61B 2018/00577 (2013.01); A61B 2018/00982 (2013.01)] | 15 Claims |
1. A medical system, comprising:
a catheter, comprising a distal-end assembly for performing a medical operation on tissue in a cavity of an organ of a patient, the distal-end assembly comprising an optical fiber configured to guide transmitted light to interact with the tissue of the cavity, and to guide returned light that interacted with the tissue;
a light source configured to produce the transmitted light;
a detector configured to measure the returned light;
a circulator configured to couple the transmitted light from the light source to the optical fiber, and to couple the returned light from the optical fiber to the detector; and
a processor, configured to establish a reference value for an intensity of the returned light while the distal-end assembly is not in contact with the tissue and to identify a contact of the distal-end assembly with the tissue based on a change in the intensity of the returned light relative to the reference value.
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