what is mastoidectomy?describe its various types..
Mastoidectomy is a surgical procedure to remove inflammation, growths and/or infection in the middle ear and mastoid air cells. Generally speaking, this procedure is done when medical treatment hasn't controlled the infection and inflammation.
There are three types:
Simple or closed: The surgeon enters through the ear or behind the ear with a small incision and removes the infected cells.
Radical: Almost all structures are removed, including the eardrum. The stapes are often left for later use of a hearing aid.
Modified Radical: Some bones are left in the middle ear and the eardrum is rebuilt.
A mastoidectomy is a surgical procedure designed to remove infection or growths in the bone behind the ear (mastoid bone). Its purpose is to create a "safe" ear and prevent further damage to the hearing apparatus.
its types are:
closed cavity mastoidectomy: the external auditory canal is left intact.simple (or cortical) mastoidectomy: the mastoid is only opened to a limited extent; this procedure is no longer performed for chronic inflammatory disease. intact canal wall mastoidectomy, with removal of Koerners septum, allowing inspection of the middle ear structures
2. open cavity (radical) mastoidectomy: the external auditory canal is removed, the mastoid cavity communicates freely with the middle ear; the ossicles, apart from the stapes if possible, are removed .If the ossicles are preserved, the procedure is called a modified radical mastoidectomy.