I have questions about accuracy of text book information concerning best method to measure temperature this is concerning DeWit's Fundamental concepts and skills for Nursing 3rd edition.
In three different points in the book it appeared there were conflicting information as to the most accurate method of assessing temperature as follows:
"The temporal artery thermometer is the most accurate noninvasive way to measure body temperature. It is passed over the temporal artery in the forehead. It captures the naturally emitted heat from the skin over the temporal artery, taking 1000 readings per second and selects the highest reading. It provides an accurate arterial temperature." P 342
"Measurement by tympanic thermometer comes closest to core body temperature. "P 368 fourth bullet under key points
Critical thinking question: Pg. 347 under skill 21-1 Q 2: "Many physicians feel that using the electronic termometer is more accurate than using a tympanic thermometers for an ill adult. What do you think would be the reason for this? "
Answer to Critical thinking question from your answer key:
2. For an oral temperature, the thermometer tip comes into contact with the mucosal vessels under the tongue. This gives a more direct reading of the temperature. Adults often have wax buildup in the ears, and this can interfere with the reading of the tympanic temperature. A temporal artery temperature is even more accurate.
In my own practice I was taught rectal was most accurate, as it was assessing core temperature, but after reading this information, none of which even highlighted rectal, I'm not sure what to tell my students. What is the order of accuracy as for a taking temperature goes?? is it temporal artery, the oral, then tympanic and where does rectal temp. fit in??