Integrated fiber optical and thermal sensor for noninvasive monitoring of blood and human tissue

Vladimir A. Saetchnikov; Elina A. Tcherniavskaia; Gerhard Schiffner

doi:10.1117/12.722900

16 May 2007 Integrated fiber optical and thermal sensor for noninvasive monitoring of blood and human tissue

Vladimir A. Saetchnikov, Elina A. Tcherniavskaia, Gerhard Schiffner

Proceedings Volume 6585, Optical Sensing Technology and Applications; 658514 (2007) https://doi.org/10.1117/12.722900
Event: International Congress on Optics and Optoelectronics, 2007, Prague, Czech Republic

Abstract

A novel concept of noninvasive monitoring of human tissue and blood based on optical diffuse reflective spectroscopy combined with metabolic heat measurements has been under development. A compact integrated fiber optical and thermal sensor has been developed. The idea of the method was to evaluate by optical spectroscopy haemoglobin and derivative concentrations and supplement with data associated with the oxidative metabolism of glucose. Body heat generated by glucose oxidation is based on the balance of capillary glucose and oxygen supply to the cells. The variation in glucose concentration is followed also by a difference from a distance (or depth) of scattered through the body radiation. So, blood glucose can be estimated by measuring the body heat and the oxygen supply. The sensor pickup contains of halogen lamp and LEDs combined with fiber optical bundle to deliver optical radiation inside and through the patient body, optical and thermal detectors. Fiber optical probe allows diffuse scattering measurement down to a depth of 2.5 mm in the skin including vascular system, which contributes to the control of the body temperature. The sensor pickup measures thermal generation, heat balance, blood flow rate, haemoglobin and derivative concentrations, environmental conditions. Multivariate statistical analysis was applied to convert various signals from the sensor pickup into physicochemical variables. By comparing the values from the noninvasive measurement with the venous plasma result, analytical functions for patient were obtained. Cluster analysis of patient groups was used to simplify a calibration procedure. Clinical testing of developed sensor is being performed.

Citation Download Citation

Vladimir A. Saetchnikov, Elina A. Tcherniavskaia, and Gerhard Schiffner "Integrated fiber optical and thermal sensor for noninvasive monitoring of blood and human tissue", Proc. SPIE 6585, Optical Sensing Technology and Applications, 658514 (16 May 2007); https://doi.org/10.1117/12.722900

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