US 11,723,538 B2
Optical pressure sensor assembly
Peter H. Smith, Pacifica, CA (US); and Manish Kankaria, Fremont, CA (US)
Assigned to AVINGER, INC., Redwood City, CA (US)
Filed by Avinger, Inc., Redwood City, CA (US)
Filed on Mar. 1, 2021, as Appl. No. 17/189,123.
Application 17/189,123 is a continuation of application No. 14/776,748, granted, now 10,932,670, previously published as PCT/US2013/032011, filed on Mar. 15, 2013.
Prior Publication US 2022/0039658 A1, Feb. 10, 2022
Int. Cl. A61B 5/00 (2006.01); G01B 9/02056 (2022.01); G01B 9/02091 (2022.01); A61B 5/0215 (2006.01); G01B 9/02015 (2022.01); G01L 9/00 (2006.01)
CPC A61B 5/0084 (2013.01) [A61B 5/0066 (2013.01); A61B 5/02154 (2013.01); A61B 5/6852 (2013.01); A61B 5/7278 (2013.01); G01B 9/02025 (2013.01); G01B 9/02057 (2013.01); G01B 9/02091 (2013.01); A61B 2560/0238 (2013.01); A61B 2560/0475 (2013.01); A61B 2562/0233 (2013.01); A61B 2562/0238 (2013.01); A61B 2562/0247 (2013.01); A61B 2576/00 (2013.01); G01L 9/0077 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A pressure measurement system, comprising:
an optical radiation source;
a pressure probe comprising:
an optical fiber;
a housing surrounding a portion of the optical fiber, a distal end of the optical fiber positioned at an opening of the housing at a first end of the housing;
a resilient sheath overlaid across the opening in the housing, the sheath adapted to deflect in response to a pressure exerted on an outer surface of the sheath, the optical fiber configured to transmit optical radiation to the sheath and receive optical radiation reflected or scattered by the sheath while the sheath is deflected;
a mirror in a distal tip of the housing, wherein the mirror is configured to reflect optical radiation from the optical fiber to the sheath; and
an optical connector in optical communication with the optical radiation source;
receiving electronics configured to receive the reflected or scattered optical radiation from the optical fiber; and
a processor configured to compute a pressure value based upon the optical radiation received by the receiving electronics.