The system, which monitors the patient while in bed, consists of a piezoelectric sensor that produces an electrical signal in response to physiological stimulation, and a microprocessor control unit that analyzes the recorded signal and identifies respiratory and heart rates and patient motion, while patient is in bed,. In addition, the system indicates patient's in or out of bed status. The system also provides alerts if either of the physiological parameters cross predefined threshold settings (e.g., high/ low heart rate or respiratory rate, or motion or time in bed).