A reliable patient monitoring system which analyzes the correlated physiological signals collected from the patient's body, and generates alarms for abnormalities.
The system uses 3 physiological signals collected from the biomedical sensors attached to the patient body.
S1: Heart Rate (HR)
S2: Pusle Rate (PR)
S3: Respiration Rate (RESP)
The following is the design figure used to build the monitoring system where
- The signals are passed through three processing units, called threshold functions, to detect patient abnormalities.
- Each threshold function generates an alarm whenever a data sample of the corresponding signal exceeds a pre-defined threshod. A "1" on the output of each function indicates an alarm and a "0" corresponds to absence of an alarm.
- A majority voter function then generates the final output, based on the value of that the majority of the threshold functions agreed upon.
The following are the threshold values used:
| Signals | Empirical Thresholds | Theoretical Thresholds |
|---|---|---|
| Heart Rate (HR) | a = 80.17, b = 98.52 | a = 78.84, b = 96.83 |
| Pressure Rate (PR) | a = 79.00, b = 97.07 | a = 78.15, b = 96.09 |
| Respiration Rate (RR) | a,b = Generated using CDF | a,b = Generated using CDF |