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The purpose of this study is to evaluate the suitability of five different anesthetic protocols (isoflurane, isoflurane–xylazine, pentobarbital, ketamine–xylazine, and ketamine–xylazine–vecuronium) for functional blood flow imaging in the rat eye. Total retinal blood flow was measured at a series of time points using an ultrahigh-speed Doppler OCT system. Additionally, each anesthetic protocol was qualitatively evaluated according to the following criteria: (1) time-stability of blood flow, (2) overall rate of blood flow, (3) ocular immobilization, and (4) simplicity. We observed that different anesthetic protocols produced markedly different blood flows. Different anesthetic protocols also varied with respect to the four evaluated criteria. These findings suggest that the choice of anesthetic protocol should be carefully considered when designing and interpreting functional blood flow studies in the rat eye.United States. National Institutes of Health (R01-EY011289-29)United States. National Institutes of Health (R44-EY022864)United States. National Institutes of Health (R01-CA075289-16)United States. Air Force Office of Scientific Research (FA9550-15-1-0473)United States. Air Force Office of Scientific Research (FA9550-12-1-0499

Evaluating anesthetic protocols for functional blood flow imaging in the rat eye