Physiological signal feedback control tilting table for rehabilitation training

In this research, we design a physiological signal feedback closed-loop control tilting table for rehabilitation training. There have three close-loop control structures which monitor the tilting table. One is the blood pressure monitor. The others are the control loop of the degree of tilting table and the feedback control loop of the physiological signal. The pre-results of this tilting table system were performed in 5 normal subjects. Systolic blood pressure is not significant difference from supine to maximal tilt. Mean blood pressure increased from 79±6 mmHg before tilting to 84±6 mmHg (p<0.05) at 60 degrees. Diastolic blood pressure increased from 63±7 mmHg before tilting to 70±8 mmHg at 60 degrees. Linear regression analysis of pooled data, accounting for subjects variability, shows a highly significant correlation between heart rate and degree of tilt (r=0.9835, p<0.01)