Skin Blood Flow
The laser Doppler technique measures blood flow in the very small blood vessels of the microvasculature, such as the low-speed flows associated with nutritional blood flow in capillaries close to the skin surface and flow in the underlying arterioles and venules involved in regulation of skin temperature.
The tissue thickness sampled is typically 1mm, the capillary diameters 10 microns and the velocity spectrum measurement typically 0.01 to 10mm/s.
The technique depends on the Doppler principle whereby low power light from a laser is scattered by moving red blood cells and as a consequence is frequency broadened. The frequency broadened light, together with laser light scattered from static tissue, is returned to the instrument and measured. The laser light is taken to the skin and back again through a fibre-optic probe.
We distribute laser Doppler units from Moor Instruments:
Imagers - giving a coloured-mapped image of flow in a scanned area
Monitors - probe-based systems for recording flow
Accessories - cuff inflators, skin heaters, data acquisition modules and iontophoresis modules
Probes - a large variety of probes for probe-based systems
For pricing, availability and local support, please email or call us.