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  • Title: Use of infrared thermometry and effect of otitis externa on external ear canal temperature in dogs.
    Author: Huang HP, Shih HM.
    Journal: J Am Vet Med Assoc; 1998 Jul 01; 213(1):76-9. PubMed ID: 9656028.
    Abstract:
    OBJECTIVE: To compare infrared thermometry with rectal thermometry as a method of assessing core body temperature in dogs and to assess the effect of otitis externa on external ear canal temperature (EECT). DESIGN: Prospective study. ANIMALS: 650 dogs without history or clinical signs of otitis externa and 85 dogs with recurrent or chronic otitis externa. PROCEDURE: Rectal temperature was measured, using a mercury thermometer. External ear canal temperature was measured, using an infrared tympanic thermometer. RESULTS: Measurements of body temperature at the 2 sites did not agree. Sensitivity and specificity of infrared thermometry in detecting fever, as determined by rectal thermometry, were 69.7 and 84.6%, respectively. Use of methods to predict rectal temperature from EECT did not improve the accuracy of infrared thermometry. Otitis externa significantly influenced EECT. CLINICAL IMPLICATIONS: Use of infrared thermometry as a replacement for rectal thermometry in assessing core body temperature in dogs was unsatisfactory. The 2 methods for measuring body temperature were not interchangeable in dogs.
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