| Retinal artery air embolism in dogs: fluorescein angiographic evaluation of effects of hypotension and hemodilution. | |
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MedLine Citation:
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PMID: 10320159 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cerebral air embolism can cause cerebral complications after open heart surgery. The duration of cerebral artery occlusion by air embolism is thought to vary depending on the conditions. However, no study has evaluated factors affecting the duration of occlusion. In this study, we examined the effects of blood pressure and hemodilution on the duration of retinal artery occlusion caused by air embolism in dogs. The duration of retinal artery occlusion caused by the injection of 0.6 mL of air into the common carotid artery was measured by fluorescein angiography and compared among the following three periods: a control period, during which the mean blood pressure (MBP) was maintained at 80 mm Hg; a hypotension period, during which MBP was decreased to 60 mm Hg by exsanguination; and a hypotension plus hemodilution period, during which an additional exchange of blood with hydroxyethyl starch solution was performed and MBP was maintained at 60 mm Hg. When MBP was lowered from 80 to 60 mm Hg, the duration of retinal artery occlusion was prolonged from 34+/-39 to 166+/-90 s (P < 0.01). In dogs with MBP of 60 mm Hg, hemodilution (12.0+/-0.9 to 7.3+/-0.5 g/dL hemoglobin concentration) shortened the duration from 166+/-90 to 75+/-50 s (P < 0.05). Our results demonstrate that hypotension prolongs and hemodilution shortens the duration of retinal artery occlusion caused by air embolism. IMPLICATIONS: We evaluated the effects of blood pressure and hemodilution on the duration of retinal artery occlusion caused by air embolism by retinal fluorescein angiography. Hypotension prolonged and hemodilution shortened the duration of retinal artery occlusion caused by air embolism. |
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Authors:
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K Soga; H Fujita; T Andoh; F Okumura |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Anesthesia and analgesia Volume: 88 ISSN: 0003-2999 ISO Abbreviation: Anesth. Analg. Publication Date: 1999 May |
Date Detail:
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Created Date: 1999-05-20 Completed Date: 1999-05-20 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 1310650 Medline TA: Anesth Analg Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 1004-10 Citation Subset: AIM; IM |
Affiliation:
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Department of Anesthesiology, Yokohama City University School of Medicine, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Blood Pressure* Body Temperature Dogs Embolism, Air / complications* Fluorescein Angiography* Hemodilution* Hemoglobins / analysis Retinal Artery Occlusion / etiology* Time Factors |
| Chemical | |
Reg. No./Substance:
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0/Hemoglobins |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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