A new method for identification of the significant point in the Plethysmografical record

Photopletysmography (PPG) is a non-invasive, and easy to diagnostic method. It is used in many branches of medicine such as industrial medicine, intensive care, angiology or rheumatology. This examination makes it possible to assess the peripheral blood circulation in the vessel bed. It can be helpful in qualitative evaluation of the blood system.[3] Unfortunately, there is not a universal method to assess uniform valuation of the PPG due to the strong variability of the signal and therefore we try to propose an algorithm for systematical diagnostics of plethysmographical record. New algorithm designed for identification of the significant points in the PPG record is described in the paper. The algorithm is based on the continuous wavelet transform (CWT).