Ocular rigidity, ocular pulse amplitude, and pulsatile ocular blood flow: the effect of intraocular pressure.
作者： Anna I. Dastiridou , Harilaos S. Ginis , Dirk De Brouwere , Miltiadis K. Tsilimbaris , Ioannis G. Pallikaris
DOI: 10.1167/IOVS.09-3760
关键词: Ocular rigidity 、 Pulse (signal processing) 、 Muscle Rigidity 、 Blood flow 、 Ophthalmology 、 Human eye 、 Mechanical resistance 、 Surgery 、 Intraocular pressure 、 Medicine 、 Pulsatile flow
摘要: PURPOSE.The purpose of this study was to characterize the pressure‐volume relation in living human eye, measure ocular pulse amplitude (OPA), and calculate corresponding pulsatile blood flow (POBF) a range clinically relevant IOP levels. METHODS.Fifty patients with cataract (50 eyes) were enrolled study. After cannulation anterior chamber, computer-controlled device for intraoperative measurement control used artificially increase stepping procedure from 15 40 mm Hg. The continuously recorded 2 seconds after each infusion step. approximated an exponential fit, rigidity coefficient computed. OPA, volume (PV), POBF measured continuous recordings. R ESULTS.The average 0.0224!L !1 (SD 0.0049). OPA increased by 91% PV decreased 29% 30%, respectively, when increasing is positively correlated (r"0.65,P#0.01). CONCLUSIONS.The present results suggest nonlinear pressure‐ eye characterized at higher relate mechanical resistance wall high (Invest Ophthalmol Vis Sci.2009;50:5718‐5722) DOI:
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