OPS-Code 5-195.c2:

You had surgery on the middle ear and on the mastoid process, which is the bony projection behind the ear. Your auditory ossicles were partially replaced.

The ear is a sensory organ that is used to hear and to maintain one’s balance. There are 3 different areas in the ear: the outer ear, middle ear and inner ear.The outer ear begins at the auricle and then becomes the external auricular canal. The end of the external auricular canal is sealed by a thin membrane. This membrane is known as the eardrum.The middle ear begins behind the eardrum. It consists of the air-filled tympanic cavity and the 3 ossicles.The ossicles transmit sounds from the eardrum to the inner ear in the form of vibrations.

This type of operation is intended to restore the middle ear. If there is a hole or tear in the eardrum, the eardrum must also be restored. The eardrum can be covered with connective tissue or a thin layer of cartilage for this purpose. The auditory ossicles are partially or fully removed and then replaced.

You had parts of your auditory ossicles replaced with synthetic material. The material used may be metal or plastic, for example.

There is a small bony projection on the head behind the ear. It contains small cavities full of air. You can feel this bony projection behind the ear.The air-filled cavities in the mastoid process are connected to the middle ear.

The cavities inside your mastoid process were cleared. This is normally done by removing the walls between the individual cavities using a surgical burr drill. This procedure converts the many small cavities in the mastoid process into one large cavity. This space was connected with your outer ear canal to form a single cavity.