Objective:To explore the anatomic characteristics of sinus tympani and facial recess and provide anatomical data for theoperationonthe middle ear using endoscope technique.
The inner ear blood flow (IEBF) were respectively measured by laser doppler flowmetry(LDF) with operation in 2 WM and 4WM group onthe 2nd and 4th week after injecting .
Objective To explore a procedure useful to predict preoperatively the complication of stapedial gusher potentially occurring during theoperationon or involving in the inner ear.