Oregon Certified Nursing Assistant State Practice Exam

How far should a tympanic thermometer be inserted into the ear for an accurate reading?

1. 1/4 to 1/2 inch

2. 3/4 inch

3. 1 inch

4. 1 1/2 to 2 inches

The correct answer is: 1/4 to 1/2 inch

For accurate measurements using a tympanic thermometer, the device should be inserted approximately 1/4 to 1/2 inch into the ear canal. This range ensures that the thermometer reaches the tympanic membrane, which is located deep within the ear but not so far that it could cause discomfort or injury. Inserting the thermometer within this recommended range allows for reliable readings of the body's core temperature, as the tympanic membrane closely reflects core temperature levels. Care should be taken not to insert it too deeply, as this could result in an inaccurate reading or potentially injure the ear. It is also important to approach this task with caution to maintain patient comfort and safety.