Patent Number: 6,166,806

Title: Fiber optic catheter for accurate flow measurements

Abstract: A two-fibre optic probe or sensor performs accurate measurements of fluids flowing within a remote vessels, such as blood flowing within arteries or veins or fluid flowing within pipes. One of the fibre transmits a light that is intercepted by a reflective surface. The reflective surface reflects the light out of the probe through an optically transparent window, located in the probe, and into the volume of the fluid. A portion of the emitted light scatters back, as backscatter, through the optical window into the probe where the light once again encounters the reflective surface. The reflective surface then directs the backscattered light directly into the terminal ends of the other fibre that receives the light. The detected light is used to measure the volume of the fluid at the area where the incident beam of the emitted light and the backscattered light overlaps.

Inventors: Tjin; Swee Chuan (Singapore, SG)


International Classification: A61B 5/026 (20060101); A61B 5/027 (20060101); G01F 1/66 (20060101); G01P 5/26 (20060101); G01P 5/00 (20060101); G01S 17/00 (20060101); G01S 17/58 (20060101); G01S 7/481 (20060101); G01N 015/02 ()

Expiration Date: 12/26/2017