Measuring the steady-state value and the dynamics of the skin blood flow using the non-contact laser speckle method.
The non-contact laser speckle method provides a measure of skin blood flow with a time resolution of 1 s. Information about different characteristics of the blood flow can be obtained from measurements of the steady state and from the time course during ischaemia and reactive hyperaemia. Special signal processing, a microprocessor and a computer program facilitate the analysis of the data. They consider disturbances which come from a common tissue movement and from convulsions of the limbs. Measurements prove a decreased steady-state value and prolonged half-times during ischaemia and reactive hyperaemia when patients with peripheral arterial occlusive disease are compared with healthy subjects.
Ruth
B
B
GSF-Research Centre for Environment and Health, Oberschleissheim, Germany.
D001157:Arterial Occlusive Diseases / Q000503:physiopathology; D001783:Blood Flow Velocity; D006801:Humans; D006940:Hyperemia / Q000503:physiopathology; D007511:Ischemia / Q000503:physiopathology; D007834:Lasers; D009716:Numerical Analysis, Computer-Assisted; D016491:Peripheral Vascular Diseases / Q000503:physiopathology; D012867:Skin / Q000098:blood supply*