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Infrared ear thermometers--parameters influencing their reading and accuracy
1Faculty of Electrical Engineering, Laboratory of Metrology and Quality, University of Ljubljana, Trzaska 25, Slovenia. igor.pusnik@fe.uni-lj.si
Physiological Measurement
|November 29, 2005
Summary
Accurate temperature readings from infrared ear thermometers (IRETs) require regular calibration. This study reveals critical factors affecting IRET accuracy and warns users about careful selection and maintenance for reliable medical measurements.
Area of Science:
- Metrology
- Medical Instrumentation
- Thermometry
Background:
- Infrared ear thermometers (IRETs) are widely used for human body temperature measurement.
- Accurate IRET readings depend on regular calibration with traceable systems.
- Accessible and accredited calibration services for IRETs are limited.
Purpose of the Study:
- To identify and describe influential parameters in the calibration and use of IRETs.
- To highlight factors affecting IRET accuracy and measurement uncertainty.
- To caution users regarding the selection, maintenance, and application of medical radiation thermometers.
Main Methods:
- Extensive research on Infrared Ear Thermometers (IRETs).
- Observation and analysis of influential parameters during calibration and use.
- Evaluation of metrological characteristics like accuracy and uncertainty.
Main Results:
- Several influential parameters affecting IRET readings were identified.
- These parameters significantly impact the accuracy and uncertainty of IRET measurements.
- Existing calibration systems and accredited laboratories for IRETs are insufficient.
Conclusions:
- Users must exercise extreme caution in selecting, maintaining, and using medical radiation thermometers, including IRETs, forehead thermometers, and infrared scanning systems.
- Achieving the measurement accuracy required by technical standards is challenging with most current devices.
- Further research and development are needed to improve IRET calibration and performance.
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