Experimental Round Window Membrane Rupture

Electrophysiological Consequences in Guinea Pigs

Abstract

Round window membranes were experimentally incised, and electrophysiological consequences were measured by using an implanted electrode at 10 days interval in guinea pigs.
Ten days after surgery, AP thresholds and CM detection thresholds raised at 20dB especially in high frequency.
On the other hand, these electrophysiological parameters were as same as preoperative ones at 30 days after surgery.
This suggests that a simple incision on the round window membrane makes no remarkable changes in cochlear functions after closing the membrane.