Correlation Analysis of Intensive Care Unit physiological signal data

Cushing reflex (also known as the vasopressor response, the effect of Cushing, Cushing phenomenon, Cushing reaction) is a biological nervous system for increased intracranial pressure (ICP) in response, and the results will lead to three cases generation, which are high blood pressure with high heart rate, reduce heart rate, and irregular breathing. Cushing''s reflex is usually found in the terminal stage of acute brain injury；in addition, Cushing''s reflection is one of many ways to determine whether the transplanted organ appears exclusion phenomenon. When a whole case takes place ,it shows that the hernia may be going to happen. It was first described in detail by American neurosurgeon Harvey Cushing in 1901. In this study, the researcher used the wavelet to calculate patient signals. With symmlet 4 as a mother wavelet, the researcher used a one-dimensional discrete wavelet conversion of signal to filter and enhance features. First, the researcher had to confirm Cushing reflex. Finally, the researcher derived the features like heart rate or blood pressure from the trend line and expected it can predict the trend of intracranial pressure state through these less-invasive signals.