2023
DOI: 10.1002/lary.31218
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Bow and Lean Test for Rare Variants of Vertical Semicircular Canal BPPV

Eduardo Martin‐Sanz,
Marta Chaure‐Cordero,
Juan Riestra‐Ayora
et al.

Abstract: ObjectiveThe objective of this study was to assess the clinical significance of the Bow and Lean Test (BLT) for the diagnosis of different variants of vertical canal Benign Paroxysmal Positional Vertigo (BPPV). BLT is commonly used for diagnoses of lateral semicircular canal (LSC) BPPV. However, vertical nystagmus in the BLT may indicate the presence of other variants such as PSC‐BPPV.Methods567 patients with vertical canal BPPV were recruited. Patients with anterior semicircular canal (ASC) or PSC‐BPPV were w… Show more

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Cited by 2 publications
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“…This was most notable on the second day of testing when the patient initially displayed right beating apogeotropic nystagmus before transiently changing to upbeat and left torsional nystagmus while in the left SRT. The bow and lean test helped lateralize the affected horizontal semicircular canal but was also beneficial in clearly revealing a concomitant left posterior canal BPPV ( 18 ).…”
Section: Introductionmentioning
confidence: 99%
“…This was most notable on the second day of testing when the patient initially displayed right beating apogeotropic nystagmus before transiently changing to upbeat and left torsional nystagmus while in the left SRT. The bow and lean test helped lateralize the affected horizontal semicircular canal but was also beneficial in clearly revealing a concomitant left posterior canal BPPV ( 18 ).…”
Section: Introductionmentioning
confidence: 99%
“…However, it has undergone a gradual implementation by experienced vertigo clinicians as an additional examination for any BPPV subtype. In addition, a 45° tilt of the head has been proposed to explore the presence of BPPV affecting posterior and anterior canals to increase the sensitivity of the bow and lean test in the diagnosis of vertical canal BPPV ( 5 ). The 60° roll test and prone roll test are supplementary tests that have also been proposed to aid in determining the position of otoliths within the affected canals and in distinguishing between canalolithiasis and cupulolithiasis ( 6 ).…”
mentioning
confidence: 99%