Document Detail

Position in bed is associated with left or right location in benign paroxysmal positional vertigo of the posterior semicircular canal.
MedLine Citation:
PMID:  12239689     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To determine if position during bedrest is related to the canal affected in posterior canal benign paroxysmal positional vertigo (BPPV). MATERIALS AND METHODS: Fifty-five individuals with posterior canal BPPV were investigated. Diagnosis was established if a consistent clinical history was found with vertigo and induced positional nystagmus elicited on the Dix-Hallpike test (DHT). Preference for left or right position during bed rest was determined before performing the DHT. All patients were treated by a single particle repositioning procedure, and relapses were investigated at the seventh and 30 days posttreatment. RESULTS: Forty-five individuals always slept on the same side (29 on the right, 16 on the left side), and 10 patients preferred to change sides during bed rest. Among those patients able to maintain a constant position during bed rest, 27 and 18 presented a positive DHT on the right and left sides, respectively. The canal affected was found to be significantly associated with side during bed rest (relative risk = 2.75; P = 0.01, Fisher exact test). DHT was negative in 86% of patients at 30 days. No differences were found between individuals who presented a constant position in bed and those who changed positions. CONCLUSIONS: Lateral supine position during bed rest is associated with the canal affected in BPPV. We speculate that gravity might facilitate the deposition of particulate material on the posterior semicircular near the ampulla canal during bed rest.
José Antonio Lopez-Escámez; María José Gámiz; Manuel Gomez Fiñana; Antonío Fernandez Perez; Isabel Sanchez Canet
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of otolaryngology     Volume:  23     ISSN:  0196-0709     ISO Abbreviation:  Am J Otolaryngol     Publication Date:    2002 Sep-Oct
Date Detail:
Created Date:  2002-09-19     Completed Date:  2002-11-26     Revised Date:  2007-07-24    
Medline Journal Info:
Nlm Unique ID:  8000029     Medline TA:  Am J Otolaryngol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  263-6     Citation Subset:  IM; S    
Copyright Information:
Copyright 2002, Elsevier Science (USA). All rights reserved.)
Department of Otorhinolaryngology, Hospital de Poniente, El Ejido, Almería, Spain.
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MeSH Terms
Aged, 80 and over
Bed Rest*
Functional Laterality / physiology*
Middle Aged
Prospective Studies
Risk Factors
Semicircular Canals / physiopathology*
Supine Position / physiology*
Vertigo / etiology,  physiopathology*,  therapy*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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