In lower limbs the femoral artery carries the oxygenated blood to the thigh region and hence leads the blood to the popliteal artery around the knee in human leg. This research was carried out to evaluate the blood flow through the popliteal artery in those cases in which the femoral artery shows monophasic type of waveform in ultrasound examination. Such five cases were chosen whose femoral artery showed monophasic pattern of waveform in ultrasound procedure and same cases were also diagnosed again for the blood flow through popliteal artery using a different ultrasound machine. Popliteal artery surrounds the knee portion and hence directly supplies the energy of the blood to the tissues of the knee. In obtained results it was observed that the Popliteal artery of such cases also showed monophasic type of waveform which lead this research study to the conclusion that the blood flow through the Popliteal artery depends upon the blood flow through the femoral artery of that particular case.