When using a tympanic thermometer, how should the ear lobe be positioned before inserting the probe?

Positioning the ear lobe is crucial for obtaining an accurate reading with a tympanic thermometer, as it ensures that the probe is correctly aligned with the ear canal. When the ear lobe is pulled up and back, it straightens the ear canal, allowing for better access and improving the thermometer's ability to measure the internal temperature accurately.

This positioning helps to reduce any obstruction that may interfere with the sensor's contact with the tympanic membrane, which is necessary for an accurate reading. Pulling the ear lobe in this manner also helps in minimizing discomfort for the person having their temperature taken, as it facilitates a smoother insertion of the probe.