Medical thermometer
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United States of America Patent
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May 27, 1997
Issued Date -
N/A
app pub date -
Nov 3, 1994
filing date -
Sep 9, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
An improved prediction-type medical thermometer that provides an accurate estimate of a patient's temperature in substantially reduced time as compared to prior thermometers of this kind. This improved performance is achieved by using a special hollow probe tip having a low heat capacity and incorporating a resistive heater that is actuated only upon removal of the probe from a base housing. The heater regulates the temperature to a value of about 93.degree. F. After the probe is applied to the patient, a microprocessor repeatedly samples the thermistor and estimates the patient's temperature based on the successive samples. If a predetermined number of successive temperature estimates lie within a predetermined error range, the sampling is terminated and the most recent estimate is displayed as the patient's temperature. In addition, when that estimate lies outside of a normal temperature range, an increased number of successive estimates lying within a predetermined error range are required before the thermometer displays the estimated temperature.
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