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Thermistor/thermocouple electronic thermometers with a digital display or analog meter, designed to measure patient body temperature. The probe and meter can be attached by a cable or integrated into a one-piece pencil-like unit. Some thermometers use the same type of probe for oral, axillary, and rectal sites, and others provide probes designated for particular uses (e.g., rectal, skin); disposable probe covers are typically used to prevent cross-contamination. These thermometers may display a final temperature after sensor thermal equilibrium (steady state) and/or a predicted final temperature value extrapolated from the measurement of the initial rate of temperature change. Patient electronic thermometers are used to take periodic body temperature measurements as primary diagnostic indicators.
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