Final answer:
An otoscope is used to examine the ear and detect abnormalities or infections. It requires proper head positioning. For nostril inspection, a nasal speculum can be attached to the otoscope.
Step-by-step explanation:
The purpose of an otoscope is to examine the ear and detect any abnormalities or infections. It is commonly used by healthcare professionals to diagnose and treat conditions such as ear infections, earwax buildup, or foreign objects in the ear.
To use an otoscope, the healthcare professional holds the device and positions the patient's head properly. For an adult, the ear is straightened by gently pulling the outer ear up and back, while for a child under 3 years old, the ear is straightened by gently pulling the outer ear down and back.
An otoscope can also be used to inspect the nostrils by attaching a nasal speculum to the device. The healthcare professional places the speculum into the nostrils to get a clear view of the nasal passages.