In our future work, we will also try to establish a composite measurement system to extend the scope of the microcirculatory blood flow monitoring. This system will integrate various measurement techniques, such as those in LDF, ECG (electrocardiogram), PPG, and BPW (blood pressure waveform) signals. By the aid of this system, we can monitor the blood-supply function in different levels of the cardiovascular system, including the heartbeat, the artery, and the microcirculation. This topic needs to integrate the knowledge of electronics, optical measurement, biomechanics, signal processing, and circulatory physiology. The main idea of this topic is: under some specific condition, there can be a reliable correlation between BP and PPG waveforms. In our recent study, he noninvasively derived PPG parameters measured by our main-made system (as illustrated in the following figure) might provide an easier method to acquire the radial-artery BP waveform, and hence broaden the application of BP waveform analysis. We hope in the near future, these studies can aid the development of new medical devices contributing to the diagnosis and treatment monitoring in various chronic diseases.