Title :
Hypothermia effects microsensor measurement of tissue pH
Author :
Auerbach, Alan H. ; Soller, Babs R. ; Peura, Robert A. ; Stahl, Russell F.
Author_Institution :
Div. of Cardiothoracic Surg., Massachusetts Univ. Med. Center, Worcester, MA, USA
Abstract :
pH monitoring during heart surgery requires temperature-correction of the sensor calibration constants to accurately measure tissue pH during hypothermic cardiac arrest. Polynomial regressions derived from sensor calibrations at different temperatures accurately described the relationship between pH and voltage output of the sensor. The error without temperature-correcting the sensor was as large as 0.3 pH units during in vivo measurements
Keywords :
biomedical measurement; biosensors; biothermics; calibration; cardiology; microsensors; pH measurement; patient monitoring; polynomials; surgery; error; heart surgery; hypothermia effects; hypothermic cardiac arrest; in vivo measurements; microsensor measurement; pH monitoring; polynomial regressions; sensor calibration constants; temperature-correction; tissue pH; voltage output; Calibration; Cardiac arrest; Heart; In vivo; Microsensors; Polynomials; Sensor phenomena and characterization; Surgery; Temperature sensors; Voltage;
Conference_Titel :
Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2050-6
DOI :
10.1109/IEMBS.1994.415167
