Which temperature measurement method is commonly used and serves as the next best option after PA catheter or tympanic?

• A. Tympanic
• B. Esophageal
• C. PA catheter
• D. Oral

Answer: (A)

Tympanic temperature measurement is commonly used because it provides a quick, noninvasive estimate of core temperature that tracks changes in temperature fairly well in the operating room. Its practicality—easy placement, minimal disturbance to the patient, and no need for vascular access or airway instrumentation—makes it a go-to option when a pulmonary artery catheter or other invasive core-temperature monitoring isn’t being used. To get reliable readings, ensure the ear is clear, place the probe correctly against a clean tympanic membrane path, and recognize that readings can be affected by external factors or ear pathology. While esophageal or oral measurements and invasive PA catheter monitoring can offer accurate core temperature, tympanic temperature remains a widely adopted, convenient next-best choice in many perioperative settings.