Method and apparatus for deriving mean arterial pressure of a subject

A computer program stored in a memory of an electronic device, the computer program having a set of instructions, when executed, is arranged to control a processor of the electronic device to:

• (i) receive data from an optical sensing module relating to at least one cardiac cycle of a bio-signal from a subject;
• (ii) normalize the received data relating to the at least one cardiac cycle;
• (iii) calculate an area enclosed by the normalized received data to obtain a normalized area;
• (iv) calculate a heart rate of the subject from the at least one cardiac cycle;
• and
• (v) derive mean arterial pressure of the subject from the normalized area and heart rate.

Apparatus for deriving mean arterial pressure of a subject, the apparatus comprising:

• (i) a receiver for receiving data from an optical sensing module relating to at least one cardiac cycle of a bio-signal from the subject;
• (ii) a processor for:
• (a) normalizing the received data relating to the at least one cardiac cycle;
• (b) calculating an area enclosed by the normalized received data to obtain a normalized area;
• (c) calculating a heart rate of the subject from the at least one cardiac cycle;
• and
• (d) deriving the mean arterial pressure from the normalized area and heart rate.