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Vestibular-evoked myogenic potentials after superior semicircular canal obliteration
1Institut G. Portmann, 114 avenue d'Arbs, 33076 Bordeaux cedex, France.
Objective:
To analyse vestibular evoked myogenic potentials (VEMPs) characteristics in patients with superior semicircular canal dehiscence syndrome (SCDS) after surgical plugging.
Materials And Methods:
Five surgical plugging of SCD were performed on 4 patients presenting uni- or bilateral SCD. VEMPs were recorded before and after surgery.
Results:
Postoperative VEMP testing revealed in all cases a normalization of the response on the operated side.
Discussion:
Patients with SCDS typically have VEMPs with pathologically low thresholds and large amplitude potentials. VEMPs represent a screening investigation for SSCD and a valuable tool in the postoperative follow-up to confirm the successful repair of the dehiscence. In bilateral SSCD cases, VEMPs help to localize the worst side which is operated first.
Conclusion:
VEMPs are essential in both preoperative planning and postoperative monitoring of patients with SCDS.
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