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The Supine Superior Semicircular Canal Dehiscence Test.
Hoppes, Carrie W; Lambert, Karen H; Zalewski, Chris; Pinto, Robin; Burrows, Holly; McCaslin, Devin.
  • Hoppes CW; Army-Baylor University Doctoral Program in Physical Therapy, Fort Sam Houston, San Antonio, TX.
  • Lambert KH; Hearing Center of Excellence, Lackland Air Force Base, San Antonio, TX.
  • Zalewski C; Otolaryngology Branch, Audiology Unit, National Institute on Deafness and Other Communication Disorders (NIDCD), Bethesda, MD.
  • Pinto R; Audiology Clinic, Walter Reed National Military Medical Center, Bethesda, MD.
  • Burrows H; Audiology Clinic, Walter Reed National Military Medical Center, Bethesda, MD.
  • McCaslin D; Michigan Medicine, Department of Otolaryngology-Head and Neck Surgery, University of Michigan, Ann Arbor.
Am J Audiol ; 30(3): 475-480, 2021 Sep 10.
Article en En | MEDLINE | ID: mdl-34153201
ABSTRACT
Purpose The purpose of this clinical focus article is to describe a new method for assessment of superior semicircular canal dehiscence by laying the patient supine during Valsalva-induced nystagmus testing. Method The traditional Valsalva-induced nystagmus test is described, followed by a new method for assessment of superior semicircular dehiscence conducted by laying the patient supine during testing. A case study is presented to illustrate this new testing technique known as the Supine Superior Semicircular Canal Dehiscence Test. Results It is hypothesized that during Valsalva-induced nystagmus testing performed in the upright, seated position, the dura mater could potentially seal the superior semicircular canal fistula, thereby concealing a defect in the bony labyrinth and yielding a false-negative test. To circumvent this, the patient should be placed in the supine position during Valsalva-induced nystagmus testing in order to prevent the dura mater from inadvertently sealing itself against the petrous portion of the temporal bone. The Supine Superior Semicircular Canal Dehiscence Test may reveal the defect in the bony labyrinth and improve the sensitivity of the Valsalva-induced nystagmus test. Conclusions The Supine Superior Semicircular Canal Dehiscence Test may be more sensitive for identifying superior semicircular canal dehiscence in patients with traditional symptoms and a negative Valsalva-induced nystagmus test in the seated position. While a case study is presented to illustrate the potential benefits of including the Supine Superior Semicircular Canal Dehiscence Test in the battery of diagnostic tests, further research is needed in larger samples.
Asunto(s)

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Enfermedades Vestibulares / Nistagmo Patológico / Dehiscencia del Canal Semicircular Límite: Humans Idioma: En Año: 2021 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Enfermedades Vestibulares / Nistagmo Patológico / Dehiscencia del Canal Semicircular Límite: Humans Idioma: En Año: 2021 Tipo del documento: Article