The diagnostic value of phase-angle tympanograms.
The diagnostic value of susceptance, conductance, resistance, reactance, admittance and phase-angle tympanograms is compared. Phase-angle tympanograms seem to be best suited for the discrimination between normal W patterns and broad irregular curves obtained from ossicular disruptions, luxations and necroses. Several possibilities are proposed: phase-angle tympanograms at the drum, phase-angle tympanograms at the tip of the measuring probe and corresponding phasor curves. The best choice will depend on the kind of data processing and/or measuring equipment available.
D000158:Acoustic Impedance Tests / Q000379:methods*; D004427:Ear Diseases / Q000175:diagnosis; D004429:Ear Ossicles / Q000473:pathology; D004432:Ear, Middle / Q000473:pathology; D006801:Humans; D014432:Tympanic Membrane / Q000473:pathology