| Effects of hyperbaric, normobaric and hypobaric oxygen supplementation on retinal vessels in newborn rats: a preliminary study. | |
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MedLine Citation:
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PMID: 2439360 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An experimental study was conducted on eight litters of newborn rats to evaluate the effects of supplemental oxygen administration on the retinal vasculature. The animals and their mothers were kept inside a pressure chamber and treated for the first 5 days of life. On the sixth day, they were removed and kept for five more days under room air and normobaric conditions. Three litters received continuous flow oxygen at 80% at a compression pressure of +81 kPa, one litter oxygen at 80% at a pressure of -39.5 kPa atms and three other litters received oxygen at 80% under normobaric conditions. The eighth litter was treated with room air oxygen at a compression pressure of +81 kPa. A severe retinopathy with marked retinal neovascularization was seen only in the newborn animals of the litters that received oxygen supplementation under normobaric or hypobaric conditions. Retinal vessels showed no pathological changes in the litters treated with hyperbaric normoxia or hyperoxia. It is possible to hypothesize that the prolonged period of oxygen supplementation failed to produce harmful effects on the retinal vasculature because the moderate hyperbarism caused mild retinal and choroidal vasoconstriction thus preventing excessive oxygen transport to the inner retina from the choroid during hyperoxia without inducing structural damage to the retinal tissue. |
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Authors:
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B Ricci |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Experimental eye research Volume: 44 ISSN: 0014-4835 ISO Abbreviation: Exp. Eye Res. Publication Date: 1987 Mar |
Date Detail:
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Created Date: 1987-08-14 Completed Date: 1987-08-14 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0370707 Medline TA: Exp Eye Res Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 459-64 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Animals, Newborn / physiology* Dose-Response Relationship, Drug Hyperbaric Oxygenation / adverse effects Neovascularization, Pathologic Oxygen / pharmacology* Pressure Rats Rats, Inbred Strains Retinal Diseases / etiology Retinal Vessels / drug effects* |
| Chemical | |
Reg. No./Substance:
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7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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