Ridell operation

Ri·dell op·er·a·tion

(ri'del),
a rarely used surgical procedure for frontal sinus disease in which the entire anterior and inferior walls of the frontal sinus are removed.

Ri·dell op·er·a·tion

(rī-del' op-ĕr-ā'shŭn)
Removal of the entire anterior and inferior walls of the frontal sinus, for chronic inflammation of that cavity.