Skin Blood Flow
Also see: Analysis Software
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:
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The DRT4 is a dual or single channel instrument for measuring tissue blood perfusion and temperature. Skin temperature can be measured with combined optic/temperature probes. A four channel A/D, an integral part of the DRT4, can be used to monitor other analogue signals from instruments such as PO2, TcPO2, pH monitors etc. Flash software enables user protocols to be programmed and retained within the DRT4. Windows-based software enables data to be collected, stored and analysed. |
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The moorLAB (previously floLAB) is a modular instrument consisting of a base unit laser Doppler server and up to 3 additional laser Doppler satellite channels. The moorLAB monitors tissue blood perfusion parameters and outputs data digitally or as an analogue signal which enables interfacing with a computer and suitable data acquisition package (such as the Biopac system). An RS-232 output is also available and can be used with MoorSoft, a Windows-based acquisition and display package. A variety of probes are available. |
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The Moor Laser Doppler Imager is a two dimensional laser scanning system that can image superfical blood perfusion on both large (full torso) and small tissue areas. The unit can be controlled directly or by a computer interface with results displayed using Windows-based software. A major application is burns assessment, but of course any area of skin blood flow can be scanned. More details of the moorLDI Imager |
Probes for the DRT4 and moorLAB.
For compatible analysis software, see our Analysis Software page.
For pricing, availability and local support, please email or call us.
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