Microvessel Velocity OD-RT

Red Blood Cell Velocimeter

The Microvessel Velocity OD-RT (Optical Doppler, Real-Time) along with an intravital microscope and a computer, allows real-time measurement of red blood cell velocities in microvessels. Using vessel geometric factors, this velocity can then be used to calculate a blood shear rate. The system works by correlating two time-shifted signals from a pair of photodiodes placed in line with the direction of blood flow on a projected image of a microvessel. This "dual-slit" technique has a long history in the field of microcirculation.

 
   

Microvessel Velocity OD-RT

The Microvessel Velocity OD-RT system is designed to invasively measure blood velocity in individual microvessels. The system adapts to a microscope fitted for intravital microscopy. The image of the blood vessel seen through the microscope is projected onto a pair of photosensors. If the photosensors are aligned in the direction of flow, the output is a pair of time-shifted signals. These signals are conditioned, digitized, and fed to a computer running the velocity software package. The software calculates and outputs the blood velocity in real time.

   

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Velocimeter Manual Microvessel Velocity
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