| Use of microbubble ultrasound contrast agent to demonstrate the iris valve effect in human eye bank eyes. | |
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MedLine Citation:
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PMID: 9822238 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To demonstrate that the interface between the normal iris and the lens surface functions as a flap valve. METHOD: Microbubble ultrasound contrast agent was injected into the anterior and posterior chambers of human eye bank eyes and the distribution of contrast imaged with high-frequency ultrasound. RESULTS: Contrast agent did not enter the posterior chamber when injected into the anterior chamber, but contrast agent injected into the posterior chamber easily flowed into the anterior chamber. CONCLUSIONS: The iris-lens interface normally functions as a flap valve, preventing retrograde flow from the anterior to the posterior chamber. A temporary increase in anterior chamber pressure thus results in iris concavity in pigmentary dispersion syndrome. |
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Authors:
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C J Pavlin; P N Burns; F S Foster |
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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: American journal of ophthalmology Volume: 126 ISSN: 0002-9394 ISO Abbreviation: Am. J. Ophthalmol. Publication Date: 1998 Nov |
Date Detail:
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Created Date: 1998-11-24 Completed Date: 1998-11-24 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0370500 Medline TA: Am J Ophthalmol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 719-20 Citation Subset: AIM; IM |
Affiliation:
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Department of Ophthalmology, Ontario Cancer Institute, Princess Margaret Hospital, University of Toronto, Canada. cpavlin@home.com |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Anterior Chamber / ultrasonography* Aqueous Humor / secretion Contrast Media / metabolism* Eye Banks Humans Iris / physiology*, ultrasonography Lens, Crystalline / physiology*, ultrasonography Ocular Physiological Phenomena Polymers |
| Chemical | |
Reg. No./Substance:
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0/Contrast Media; 0/Polymers; 0/SH U 563 A |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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