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Alternobaric Vertigo PubMed alternobaric vertigo Display Settings: Abstract, 50 per page, Sorted by Recently Added Results: 26 Filters activated: Humans, English, French. Clear all to show 34 items. Laryngoscope. 2012 Apr;122(4):868-72. doi: 10.1002/lary.22182. Epub 2012 Jan 31. 1. Persistent alternobaric vertigo at ground level. Bluestone CD1, Swarts JD, Furman JM, Yellon RF. Author information Abstract We recently encountered a 15-year-old female with bilateral tympanostomy tubes who manifested persistent severe vertigo, at ground level, secondary to a unilateral middle-ear pressure of +200 mm H(2)O elicited by an obstructed tympanostomy tube in the presence of chronic nasal obstruction. We believe this is a previously unreported scenario in which closed-nose swallowing insufflated air into her middle ears, resulting in sustained positive middle-ear pressure in the ear with the obstructed tube. Swallowing, when the nose is obstructed, can result in abnormal negative or positive pressures in the middle ear, which has been termed the Toynbee phenomenon. In patients who have vertigo, the possibility that nasal obstruction and the Toynbee phenomenon are involved should be considered. Copyright © 2012 The American Laryngological, Rhinological, and Otological Society, Inc. PMID: 22294503 [PubMed - indexed for MEDLINE] PMCID: PMC3310321 Free PMC Article Publication Types, MeSH Terms, Grant Support Aviat Space Environ Med. 2010 Sep;81(9):896-7. 2. You're the flight surgeon: alternobaric vertigo. Tran DA. PMID: 20825001 [PubMed - indexed for MEDLINE] Publication Types, MeSH Terms J Appl Physiol (1985). 2009 Jan;106(1):284-92. doi: 10.1152/japplphysiol.90991.2008. Epub 2008 Oct 30. 3. The physiology and pathophysiology of human breath-hold diving. Lindholm P1, Lundgren CE. Author information Abstract This is a brief overview of physiological reactions, limitations, and pathophysiological mechanisms associated with human breath-hold diving. Breath-hold duration and ability to withstand compression at depth are the two main challenges that have been overcome to an amazing degree as evidenced by the current world records in breath-hold duration at 10:12 min and depth of 214 m. The quest for even further performance enhancements continues among competitive breath-hold divers, even if absolute physiological limits are being approached as indicated by findings of pulmonary edema and alveolar hemorrhage postdive. However, a remarkable, and so far poorly understood, variation in individual disposition for such problems exists. Mortality connected with breath-hold diving is primarily concentrated to less well-trained recreational divers and competitive spearfishermen who fall victim to hypoxia. Particularly vulnerable are probably also individuals with preexisting cardiac problems and possibly, essentially healthy divers who may have suffered severe alternobaric vertigo as a complication to inadequate pressure equilibration of the middle ears. The specific topics discussed include the diving response and its expression by the cardiovascular system, which exhibits hypertension, bradycardia, oxygen conservation, arrhythmias, and contraction of the spleen. The respiratory system is challenged by compression of the lungs with barotrauma of descent, intrapulmonary hemorrhage, edema, and the effects of glossopharyngeal insufflation and exsufflation. Various mechanisms associated with hypoxia and loss of consciousness are discussed, including hyperventilation, ascent blackout, fasting, and excessive postexercise O(2) consumption. The potential for high nitrogen pressure in the lungs to cause decompression sickness and N(2) narcosis is also illuminated. PMID: 18974367 [PubMed - indexed for MEDLINE] Free full text Publication Types, MeSH Terms Acta Otolaryngol. 2007 Aug;127(8):843-6. 4. Alternobaric vertigo: prevalence in Portuguese Air Force pilots. Subtil J1, Varandas J, Galrão F, Dos Santos A. Author information Abstract CONCLUSION: Having found a prevalence rate of alternobaric vertigo in Portuguese Air Force pilots that is somewhat higher than previously reported, we underline the importance of implementing education on the management of this condition as part of routine Air Force pilot training programs. OBJECTIVES: Alternobaric vertigo is a condition in which transient vertigo with spatial disorientation occurs suddenly during flying or diving activities, caused by bilateral asymmetrical changes in middle ear pressure. Its prevalence is very likely underestimated and under-reported, with the 10-17% prevalence rate mentioned in early literature not being challenged by recent data. SUBJECTS AND METHODS: To assess its actual prevalence, the authors requested all high performance aircraft pilots presently on active duty in the Portuguese Air Force to anonymously answer a questionnaire on alternobaric vertigo symptoms, after a short briefing on the subject. RESULTS: A 29% prevalence rate of in-flight episodes consistent with alternobaric vertigo was obtained. PMID: 17762996 [PubMed - indexed for MEDLINE] MeSH Terms Otol Neurotol. 2006 Dec;27(8):1120-5. 5. Alternobaric vertigo--really a hazard? Klingmann C1, Knauth M, Praetorius M, Plinkert PK. Author information Abstract OBJECTIVE: To determine the prevalence of alternobaric vertigo (AV) in sport divers and to find out whether AV led to dangerous situations underwater. Furthermore, to examine whether objective neurootologic tests are associated with the manifestation of AV. DESIGN: Retrospective cohort study. PARTICIPANTS: Sixty-three sport divers with an average diving experience of 10 years and 650 dives were questioned regarding their medical and diving history and the manifestation of vertigo during diving. METHODS: Microscopic otoscopy, tympanometry, stapedius reflexes, hearing threshold for air and bone conduction, caloric video-oculography including analysis of the slow-phase velocity of the nystagmus, acoustic brain stem responses, and magnetic resonance imaging were performed to find possible differences between divers with and without AV. RESULTS: We found 17 divers with AV (27%). There was no significant difference in all measured parameters apart from sex and history of middle ear equalization difficulty in divers with AV. Ten (59%) of 17 female divers and 7 (15%) of 46 male divers experienced AV, representing a significant sex difference (p < 0.001). Correlation with our divers' outpatient clinic revealed that female divers had a significantly higher incidence of middle ear equalization disorders which could be an explanation for the predominance of female divers with symptoms of AV. None of the divers reported any dangerous or life-threatening situations following AV. Whether AV leads to dangerous situations underwater remains unclear, but this hypothesis is not supported by our data. CONCLUSION: Alternobaric vertigo is a common finding in divers. In our study group, female divers had a four-time higher risk to suffer AV. Our data do not support the thesis that AV is a life-threatening condition. PMID: 17130801 [PubMed - indexed for MEDLINE] MeSH Terms J Laryngol Otol. 2003 Nov;117(11):854-60. 6. Alternobaric vertigo in sport SCUBA divers and the risk factors. Uzun C1, Yagiz R, Tas A, Adali MK, Inan N, Koten M, Karasalihoglu AR. Author information Abstract We investigated the eustachian tube function and the incidence of alternobaric vertigo (AV) in 29 sport self-contained underwater breathing apparatus (SCUBA) divers with, or without, some possible risk factors for AV. The divers had normal audiological and otoscopic findings at the pre-dive examination. We used the nine-step inflation/deflation tympanometric test and Toynbee test for evaluation of eustachian tube function, and the Valsalva manoeuvre for patency. Information on divers, their history, and their otolaryngologic examination were obtained in the pre-dive examination. Divers performed 1086 dives (mean 37, range: 3-100) during the observation period. Four divers (14 per cent) experienced AV during five dives (0.46 per cent), (one diver experienced AV two times). It was found that having an otitis media history or eustachian tube dysfunction determined with the nine-step inflation/deflation tympanometric test before diving, or difficulty in clearing ears during diving could be important risk factors for AV in sport SCUBA divers (p <.05). Divers with such findings seem to be more prone to AV and should pay rigorous attention to the precautions for prevention of AV. PMID: 14670144 [PubMed - indexed for MEDLINE] MeSH Terms Undersea Hyperb Med. 2002 Winter;29(4):260-70. 7. Alternobaric oxygen therapy in long-term treatment of Ménière's disease. Fattori B1, De Iaco G, Nacci A, Casani A, Ursino F. Author information Abstract Hyperbaric oxygen therapy (HBQ) has been used for several years as a treatment for Ménière's disease, particularly in Sweden. In this study continuous variations in pressure (from 1.7 to 2.2 ATA; alternobaric oxygen therapy: ABOT) were used to decrease endolymphatic hydrops, the typical histopathological substrate of Ménière's disease by increasing hydrostatic pressure and mechanical stimulation of the endolymphatic flow toward the duct and the endolymphatic sac, which produces a consequent increase in the dissolved O2 content in the labyrinth liquid, which should contribute to recovering cell metabolism and restoring cochlear electrophysiological function to normal. An experimental group of 20 patients suffering from unilateral Ménière's disease received a total of 15 ABOT treatment sessions during the acute episodes. Treatment
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