Revision Canal Wall Down Mastoidectomy with Mastoid Obliteration
C. Scott Brown, MD1; Prithwijit Roychowdhury2; Calhoun D. Cunningham III, MD1
1Duke University Medical Center
2University of Massachusetts Medical School
Revision canal wall down (CWD) mastoidectomy with mastoid obliteration is most often performed to manage persistent otorrhea and debris accumulation in the mastoid bowl following CWD mastoidectomy. In this case, obliteration is performed for persistent otorrhea from the mastoid bowl and revision CWD mastoidectomy is completed to address a new retraction pocket following a prior CWD mastoidectomy for chronic otitis media with cholesteatoma in a 23-year old male.
There have been numerous reported techniques used for mastoid obliteration, and in this case, a posterior periosteal flap is made, and the mastoid cavity is filled with autogenous bone paté. Following obliteration of the mastoid, a perichondrial graft is used to cover the area. In this case, a titanium total ossicular reconstruction prosthesis is used to rebuild the ossicular chain, and a second perichondrial graft is used to reconstruct the tympanic membrane. The canal is packed with Gelfoam to secure the fascial grafts in place. Postoperatively, patients are typically advised to remove their head dressing 24 hours following the surgery and to apply a topical antibiotic ointment daily to a cotton ball in the ear.
