This document discusses various medical terms and concepts related to the special senses of the eye and ear. It defines abbreviations and provides brief explanations for terms such as: pressure equalizing tube (PE tube), which is a small tube surgically placed in a child's ear to drain infections; bone conduction, which is the transmission of sound through the bones of the skull; otitis media (OM), also known as middle ear infection, which is commonly seen in children; and emmetropia (EM), which refers to a state of normal vision.
2. PRESSURE EQUALIZING TUBE
Abbreviation:
PE tube
A small tube surgically placed in a child’s ear to
assist in drainage of infection
3. Tubes are made in various shapes and of various
materials including plastic and metal. They are
inserted surgically and are extruded naturally over a
number of months.
The tube usually falls out on its own. It can stay in
for six months to one year.
6. Two types of bone conduction are recognized.
In compressional bone conduction, high-pitched
sounds cause the segments of the skull to vibrate
individually. The vibrations, by compressing the
bony case of the inner ear, stimulate the sensory
cells that are involved in perceiving sound waves in
the air.
In inertial bone conduction, low-pitched sounds
vibrate the entire skull, causing it to move while the
suspended sensory parts of the inner ear remain at
rest.
8. OTITIS MEDIA
Appreviation
OM
Also referred to as middle ear infection; seen
frequently in children. Often preceded by an upper
respiratory infection.
