The purpose of this research is to detect, locate, and define the blood vessels
in the arm of any person who has a problem in taking samples of blood for
laboratory testing in order to make it easier, not dangerous nor harmful.
Depending on the pr
operties of the scattering wave from the blood and the
depth of the penetration, we have calculated the frequency which is
necessary to choose the suitable transducer including the Geometric
Dimension as well as the materials which is made from (we have taken the
5MHz Doppler –CW for 1.2 cm depth, 2.37 attenuation ratio and the 8MHz
Doppler –CW for 0.74 cm depth , with the same attenuation ratio).
Depending on the velocity's variation of the blood flow throughout the
Biodynamic studies for important arteries in the upper limb, we have found
the Doppler frequency which occurs when the acoustic wave passes across
the blood red cell. We have designed a suitable electronic instrument which
includes the transmitter circuit, receiver circuit, and the output unit - Audio
graph.
