Superior Semicircular Canal Dehiscence - Stanford Hospital & Clinics

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VEMP Responses in SCD Syndrome • 25 patients (diagnosis = 3-D eye recordings, CT) • VEMP threshold in dehiscent ears = 75 +/- 7 dB* • VEMP threshold for normal controls = 98 +/- 4 dB* (*p < 0.001) • VEMP from contra ear did not differ from normal controls Streubel et al, Acta Otolaryngol 2001
ECoG = Alternate Diagnostic Modality • Increased SP/AP ratio (>0.4) • Seen in 14/15 cases of SSCD • Reverses with surgical correction Arts et al, O & N, 2008
Page 1 and 2: UC SF Superior Semicircular Canal D
Page 3 and 4: 54 year old with sound-induced vert
Page 5 and 6: Overview • Eye movements • Mech
Page 7 and 8: Eye movements evoked by stimulation
Page 11: Third mobile window
Page 14: Overview • Eye movements • Mech
Page 17: Lowered cVEMP Threshold in SCD 41-y
Page 21 and 22: Additional auditory Sx: • autopho
Page 25 and 26: Range of bone over SC
Page 27 and 28: Bilateral SC dehiscences
Page 29 and 30: • Unknown Genetics • 1 patient
Page 31 and 32: Superior Canal Dehiscence by CT 1.0
Page 33 and 34: 3D CT of SSCD, Crane et al, O & N,
Page 35: Middle Fossa Approach
Page 40 and 41: Surgical Correction 18 patients (9
Page 42 and 43: Meta-analysis of Surgical results V
Page 46 and 47: 48 y.o. man with pulsatile oscillop
Page 48 and 49: CT Scan showing dehiscence
Page 50 and 51: Inner Ear Conductive Hearing Loss
Page 52: Summary • VEMPs: lowered threshol

Superior Semicircular Canal Dehiscence - Stanford Hospital & Clinics

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