| Effects on pulmonary function of daily exposure to dry or humidified hyperbaric oxygen. | |
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MedLine Citation:
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PMID: 9241693 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The purpose of this study was to examine the effects of breathing dry or humidified hyperbaric oxygen on pulmonary function. Pulmonary function tests were performed before and after each of 10 hyperbaric oxygen exposures at 2.5 atmospheres absolute (ATA) for 95 min in a group of 13 patients treated daily by hyperbaric oxygen for problem wounds. Patients breathed dry oxygen during five successive sessions and humidified oxygen during the remaining five. No differences were found between forced vital capacities (FVC) and maximal expiratory flows before and after hyperbaric oxygen exposure while breathing dry or humidified oxygen. Significant differences were found for the changes in the percentage of FVC expired in 1 s (FEV1%) and mean forced mid-expiratory flow rate during the middle half of the FVC (FEF25-75%) on day 1 alone: decrements of 1.42 and 2.96%, respectively, under dry oxygen, vs. increments of 3.93 and 34.4%, respectively, for humidified oxygen. Day-to-day decrements in the percent changes in FEV1% and FEF25-75% were observed while breathing humidified hyperbaric oxygen. These results demonstrate that repeated daily exposure to humidified hyperbaric oxygen abolishes the initial beneficial effect of humidification on peripheral airways flow characteristics. |
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Authors:
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A Shupak; A Abramovich; Y Adir; I Goldenberg; Y Ramon; P Halpern; A Ariel |
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Publication Detail:
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Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: Respiration physiology Volume: 108 ISSN: 0034-5687 ISO Abbreviation: Respir Physiol Publication Date: 1997 Jun |
Date Detail:
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Created Date: 1997-09-11 Completed Date: 1997-09-11 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0047142 Medline TA: Respir Physiol Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 241-6 Citation Subset: IM |
Affiliation:
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Israel Naval Medical Institute, IDF Medical Corps, Haifa, Israel. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Humans Humidity* Hyperbaric Oxygenation* Maximal Expiratory Flow Rate Maximal Midexpiratory Flow Rate Middle Aged Respiratory Function Tests Respiratory Mechanics* Vital Capacity |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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