Bone-anchored hearing aids: Incidence and management of postoperative complications

OBJECTIVES: To determine the incidence of complications associated with implantation of the bone-anchored hearing aid (BAHA) and the management of these complications. STUDY DESIGN: Retrospective case review. SETTING: Tertiary referral center. PATIENTS: One hundred forty-nine consecutive patients between October 25, 2001, and June 29, 2005, underwent implantation of a BAHA. The majority of patients had unilateral profound sensorineural hearing loss after removal of an acoustic neuroma or skull base tumor (59.1%) with the next most common etiology of deafness secondary to sudden sensorineural hearing loss (16.1%). INTERVENTION(S): Implantation of a BAHA. MAIN OUTCOME MEASURE(S): Incidence of complications occurring after implantation of a BAHA. RESULTS: There were no intraoperative or perioperative complications. Significant postoperative complications requiring intervention occurred in 19 (12.8%) patients. Skin overgrowing the abutment occurred in 11 (7.4%) patients, and 10 of these patients required revision in the operating room. Skin overgrowth was a late complication, occurring an average of 12 months after the initial procedure. Implant extrusion occurred in 5 (3.4%) patients, with 3 requiring revision surgery. Two patients elected not to have the device reimplanted. Two patients had local wound infections requiring oral antibiotics. CONCLUSION: Significant complications are uncommon after implantation of a BAHA; however, these complications may require local wound care, antibiotics, or revision surgery.