Common reflectance patterns in Adults Eustachian tube dysfunction and otitis media Severe negative middle-ear pressure reﬂectance high and ﬂat, especially below 2 kHz Mild negative middle-ear pressure reﬂectance above normal between 0.6 and 2 kHz Normal adult range Negative pressure can decrease otoacoustic emission strength Ossicular chain pathology Ossicular discontinuity look for a notch below 1 kHz Discontinuity example Stapes ﬁxation/otosclerosis higher than average reﬂectance at lower frequencies, but may be within normal limits Otosclerosis example Severe otosclerosis example Normal adult range Tympanic membrane perforation or pressure-equalization tube Examples from four ears. Look for: - Highly variable curves across frequency - Low reﬂectance at low frequencies - Equivalent volume >> 3cc - Stable pattern with repeated tests Normal adult range © Mimosa Acoustics, Inc. 335 Fremont St, Champaign, IL 61820, USA +1-217-359-9740 This guideline is to help clinicians quickly recognize pathological patterns. Visit www.mimosaacoustics.com and read the OtoStat users manual to learn more about interpreting MEPA reﬂectance results. OtoStat For software version OtoStat 2.0 Notes version 1.0 31 Mar 2015 Common reflectance patterns in Children Otitis media in children Middle ear eﬀusion Look for reﬂectance ≥62% at 1.25 kHz Severe negative pressure Mild negative pressure Normal range 5-7 years Conductive hearing loss in infants and toddlers Conductive hearing loss Look for reﬂectance ≥69% at 1.6 kHz OME example from a young child Normal range 3-26 weeks Newborn hearing screening Interpret DPOAE pass/refer result with reﬂectance Normal range for newborns 0-4 days Is reﬂectance above norm at 2 kHz? Retest later to see if middle-ear issue is resolved Is reﬂectance in gray norm at 2 kHz DPOAE pass? No follow-up needed DPOAE refer? Follow-up needed for possible sensorineural hearing loss © Mimosa Acoustics, Inc. 335 Fremont St, Champaign, IL 61820, USA +1-217-359-9740 This guideline is to help clinicians quickly recognize pathological patterns. Visit www.mimosaacoustics.com and read the OtoStat users manual to learn more about interpreting MEPA reﬂectance results. OtoStat For software version OtoStat 2.0 Notes version 1.0 31 Mar 2015