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Publication . Article . 2008

Effet d'une diminution de la pression de perfusion oculaire sur le flux sanguin dans l'iris mesuré par fluxmétrie laser Doppler*

Stephane R. Chamot; Armand Movaffaghy; Benno L. Petrig; Charles N. Riva;
Published: 07 Nov 2008 Journal: Klinische Monatsblätter für Augenheilkunde, volume 214, pages 302-304 (issn: 0023-2165, eissn: 1439-3999, Copyright policy )
Publisher: Georg Thieme Verlag KG
Abstract
PURPOSE To determine whether iris blood flow (IBF) is regulated in response to an acute decrease in mean ocular perfusion pressure (PPm = MOAP-IOP, MOAP = mean ophthalmic arterial pressure) induced by increasing the intraocular pressure (IOP). METHODS Iris blood flow was measured using a slit lamp incorporating a laser Doppler flowmetry (LDF) module. The study was conducted on 12 normal volunteers (14 to 59 years old). IOP was raised using a scleral suction cup. In Exp. #1, the suction pressure was successively raised in steps of 50 to 100 mm Hg, each lasting about 10 sec, until IOP reached the MOAP level. In Exp. #2, the suction was raised to 200 mm Hg in 4 successive steps of 2 min duration. RESULTS In Exp. #1, no significant change of IBF was observed for small decreases of PPm ( 23%).
Subjects by Vocabulary

Microsoft Academic Graph classification: Slit lamp Hyperaemia medicine.symptom medicine Intraocular pressure Blood flow business.industry business Suction cup Laser Doppler velocimetry Blood pressure Nuclear medicine Suction

Medical Subject Headings: genetic structures sense organs eye diseases

Subjects

Ophthalmology

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