The knotted wire in stapes surgery: one possible factor in postoperative sensori-neural hearing loss.

In four instances of revision stapedectomy in patients with sensori-neural hearing loss, with or without dizziness, a wire prosthesis was found with an extention beyond the knot which could impinge on the contents of the vestibule. Four commercially manufactured knotted wire prostheses were examined, and the end of three was found projecting beyond the knot. The wire piercing the membranous labyrinth appears to be one of the factors in causing further sensori-neural hearing loss after stapedectomy. A wire loop or piston prosthesis should be considered to eliminate the hazard of a trailing end of a knotted wire in stapes surgery.