Transmastoid superior semicircular canal dehiscence plugging: VHIT findings

Area of Science:

• Otolaryngology
• Neuroscience
• Vestibular System Research

Background:

• Superior canal dehiscence syndrome (SCDS) involves a bony defect in the superior semicircular canal (SSCC).
• Surgical plugging of the SSCC is a primary treatment for SCDS.
• Transmastoid approach is a common surgical technique for SSCC plugging.

Purpose of the Study:

• To evaluate clinical outcomes after transmastoid SSCC plugging.
• To assess postoperative video head impulse test (VHIT) findings.
• To analyze audiological and vestibular symptom improvement post-surgery.

Main Methods:

• Retrospective chart review of SCDS patients undergoing transmastoid SSCC plugging.
• Analysis of pre- and post-operative audiological/vestibular symptoms and audiograms.
• Review of postoperative VHIT findings.

Main Results:

• Significant postoperative VHIT deficit in SSCC function (median gain 0.41, p=0.0391).
• Symptomatic improvement reported in almost all patients.
• No surgical complications were observed.

Conclusions:

• Transmastoid SSCC plugging is a safe and effective surgical treatment for SCDS.
• Postoperative VHIT confirms the functional deficit of the plugged SSCC.
• The procedure leads to significant symptom relief for patients.