Re-orchestration of blood flow by micro-circulations.

ABSTRACT: Haemoglobin Video Imaging (HVI) demonstrates conjunctival and episcleral blood flow in man with the resolution of a single erythrocyte. A new method for establishing vessel hierarchy in micro-circulations is described, which recognises either delivery or drainage vessels and references vessel order to the capillary. These tools have been used to characterise blood flow.Anterior ciliary arteries show pulsatile variation in diameter. The episcleral arterial circle that they supply has functional apices with pulsatile flow reversal. Perfusion fields overlap: a single delivery vessel may project to many drainage vessels and vice-versa. Some vascular pathways remained inactive throughout a 1 min angiogram.Small conjunctival delivery vessels have laminar flow, but advancing luminal constrictions

SUBMITTER: Meyer PAR 

PROVIDER: S-EPMC5811746 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature