Please be advised that this video contains graphic footage of surgery.
This video demonstrates an endoscopic frontal sinusotomy via Draf IIa Procedure performed by Dr. Garret Choby.
Chapter Author: Garret W. Choby, M.D.
Series Editors: Andrew J. Goates, M.D., Matthew L. Carlson, M.D.
To learn more about the Department of Otorhinolaryngology at Mayo Clinic, visit http://mayocl.in/2FDUHTI