Tissue monitor

• US 5,685,313 A
• Filed: 05/31/1994
• Issued: 11/11/1997
• Est. Priority Date: 05/31/1994
• Status: Expired due to Fees

• Current Assignee: Vital Media
• Original Assignee: Brain Monitor Limited
• Inventors: Mayevsky, Avraham
• Primary Examiner(s): Casler, Brian L.
• Application Number:
  US08/251,765
• Time in Patent Office: 1,260 Days
• Field of Search: 128/633, 128/634, 128/635, 128/665, 128/666, 128/667, 128/672, 128/673, 128/675, 128/692, 128/736
• US Class Current: 600/478
• CPC Class Codes: A61B 5/14553 specially adapted for cerebral tissue

Abstract

A single signal-single probe multiparameter analyzer apparatus for monitoring various parameters of the identical volume element of body tissue, which includes an input signal generator, a single signal guide which transmits input signal in, and transmits output signal out, constituting a single signal-single probe, a signal splitter which splits output signal into two or more parts, filters which separate various components of output signal, detectors which measure the different components of the output signal, a computer and an analog to digital convertor; and algorithms to evaluate the data.

Claims

1. A single signal-single probe multiparameter analyzer apparatus for monitoring at least two parameters of a body tissue, comprising:

(a) a single light source for transmitting a single light beam substantially of a single wavelength to a single volume element of the body tissue;

(b) a single light receiver for receiving resultant light from the single volume element body tissue, and for conveying said received light;

(c) a light splitter assembly connected to said single light receiver for splitting said received light into at least two split light portions;

(d) at least two detectors, each of said detectors receiving one of said split light portions, and each of said detectors simultaneously monitoring redox state of the body tissue and microcirculatory blood flow to the body tissue portion; and

(e) a processor connected to the at least two detectors for correlating the redox state of the tissue with the blood flow to the tissue.

2. The apparatus of claim 1, wherein said single light source is selected from the group consisting of Mercury lamp and He-Cd laser.

3. The apparatus of claim 1, wherein said single wavelength is selected from the group consisting of 366 nm and 324 nm.

4. The apparatus of claim 1, wherein said single light source includes a first bundle of optical fibers to transmit said light from said light source to the body tissue, and said single light receiver includes a second bundle of optical fibers to receive said resultant light and transmit said resultant light to said light splitter, and said first bundle and said second bundle are joined in a Y shape which transmits out said light from said light source and transmits in said resultant light to said light splitter.

5. The apparatus of claim 1, wherein one of said detectors is a fluorometer and another of said detectors is a Doppler Analyzer.