Final answer:
A tympanostomy tube is inserted in the eardrum to treat chronic otitis media. The tube helps drain fluid from the middle ear and equalize pressure.
Step-by-step explanation:
The type of tube inserted in the eardrum to treat chronic otitis media is called a tympanostomy tube. Tympanostomy tubes are tiny, hollow tubes made of plastic or metal that are surgically inserted into the eardrum to help drain fluid from the middle ear and equalize pressure. They are usually placed when a person has chronic ear infections or persistent fluid buildup in the middle ear.
The procedure to insert the tympanostomy tube is called a tympanostomy or myringotomy. During this procedure, a small incision is made in the eardrum and the tube is inserted to allow for better drainage. The procedure is typically done under general anesthesia and is considered safe and effective.