Document Detail


Effects of hyperbaric, normobaric and hypobaric oxygen supplementation on retinal vessels in newborn rats: a preliminary study.
MedLine Citation:
PMID:  2439360     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
B Ricci
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Experimental eye research     Volume:  44     ISSN:  0014-4835     ISO Abbreviation:  Exp. Eye Res.     Publication Date:  1987 Mar 
Date Detail:
Created Date:  1987-08-14     Completed Date:  1987-08-14     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0370707     Medline TA:  Exp Eye Res     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  459-64     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
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:
7782-44-7/Oxygen

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


Previous Document:  Elongation and shortening of time required for entry into S phase after release from G1 and G0 arres...
Next Document:  Optic nerve head axonal transport in rabbits with hereditary glaucoma.