Optical imaging of the response of vascular dynamics to a cold shock

R. L. Barbour et al. (2000)


We have explored the real–time response of the forearm vasculature to a contralateral cold shock. Dual–wavelength measurements were collected at 2 Hz, and the resulting image series (300 images per wavelength) was analyzed using appropriate time–series analysis methods. This confirmed the immediate vasoconstrictive response followed by an ~15–30 sec delay of a decrease in blood oxygenation. Overall, a wealth of time–varying responses were observed throughout the cross–section.