The heat-acclimated rock pigeon is thought to use cutaneous water evaporation (CWE) as the 'preferred' route for heat dissipation, and this mechanism is controlled by adrenergic signaling. In the present study, we tested the hypothesis that adjustments in skin blood flow are a crucial component of this adaptation. Skin blood flow was measured by laser Doppler flowmetry and by ultrasonic flowmet...

The laser Doppler flowmetry (LDF) technique is a non invasive method that measures the microvascular blood cell perfusion through tissue. It uses the principle of Doppler shifts. LDF signals are non stationary. As other physiological signals, the LDF ones need an appropriate method to be analyzed and the extraction of the microvascular activities dynamic evolution is not an easy task. For that ...

Laser-based medical techniques for evaluating blood flow (BF), such as laser Doppler flowmetry, speckle contrast imaging, etc., are known, but expensive and have some disadvantages. Recently, we proposed a new technique—incoherent optical fluctuation flowmetry (IOFF), which is realized using LED-based probe. This work aims to theoretically study the dependence of BF registered by IOFF on source...

OBJECTIVES To estimate the measuring depth of the blood flow and to establish the vascular contributions to these measurements with scanning laser Doppler flowmetry (SLDF) of the primate anterior optic nerve. METHODS Optic nerve blood flow in each eye of 8 monkeys was measured using SLDF before and following surgical occlusion of the central retinal artery (n = 4) or posterior ciliary arterie...