. Biophysical research methods. Biophysics -- Research. V. TEMPERATURE DETERMINATIONS 149 4. Applu'alions of Thermocouples Although ihermocouples can be used wherever Uquid-in-glass thermometers are apphcable, they have the additional advantages of small heat capacity and they can be read in situ by remote connection. This is a particularly important consideration when it is desired to measure the temperature of a patient in a fever cabinet or during crj^otherapy (5). Under these circumstances, it is important that the patient's temperature be recorded from minute to minute. Fiu'thermore, ther
. Biophysical research methods. Biophysics -- Research. V. TEMPERATURE DETERMINATIONS 149 4. Applu'alions of Thermocouples Although ihermocouples can be used wherever Uquid-in-glass thermometers are apphcable, they have the additional advantages of small heat capacity and they can be read in situ by remote connection. This is a particularly important consideration when it is desired to measure the temperature of a patient in a fever cabinet or during crj^otherapy (5). Under these circumstances, it is important that the patient's temperature be recorded from minute to minute. Fiu'thermore, thermocouples have more than 100 times the sensitivity of a liquid-in-glass thermometer and are ten times as precise in the hands of the ordinary observer. Particular applications of thermocouples to the measurement of internal temperature may be described to demonstrate the great flexibility of this method. Some of these are as follows: Rectal Thermometers. A simple type of rectal thermometer was described by Hardy and Soderstrom (6) and consists of a single thermocouple and a galvanometer. The cold junction is immersed in a Thermos flask in warm water within 3°C. of body temperature. tSit^. Fig. 6. Circuit diagram of I'cctal thermomotcrs: (G) galvaiiomctpi-; (V) vacuum Ijottle; (S) rotary switch. Lower rnjhf, construction of rectal tlier- mometer: (T) rubber tubing; (L) latex coating; {J) thermal junction. After Hardy, Duerschner, and Muschenheim (7).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Uber, Fred Murray, 1905-. New York : Interscience Publishers
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