Hematocrit measurement by differential optical geometry in a sho

Surgery – Truss – Pad

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

A61B 500

Patent

active

047763400

ABSTRACT:
An optical fiber carries a light beam through a cardiovascular catheter and projects the beam into the patient's bloodstream. Two other fibers, spaced in a very carefully controlled configuration from the first, receive light scattered by corpuscles (and blood-vessel walls) and transmit this reflected light back through the catheter to respective detectors outside the patient's body. If preferred, two input fibers and a single output fiber--or other techniques for providing differential geometry--may be used instead. Electronic instrumentation finds the ratio of the two light fluxes, thus cancelling out unknown variables such as input light intensity and optical--connector attenuation. The known differential geometry between the two light paths permits calibration of the ratio measurement in terms of corpuscular concentration--i.e., hematocrit. Light at only one wavelength suffices for the measurement. Advanced forms of the invention correct for proximity of blood-vessel walls. This system is particularly compatible with optical-fiber measurements of oxygen saturation, as either or both of the light paths already provided may be used for the oxygen reflectometry.

REFERENCES:
patent: 4623248 (1986-11-01), Sperinde
Spectrophotometric Monitoring of Arterial Oxygen Saturation in the Fingertip by Yoshiya, Shimada, Tanaka in Medical & Bio. Eng. & Computing Jan. 1980.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Hematocrit measurement by differential optical geometry in a sho does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hematocrit measurement by differential optical geometry in a sho, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hematocrit measurement by differential optical geometry in a sho will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1951865

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.