Plethysmograph pulse recognition processor

A processor having a plethysmograph waveform input resulting from light attenuated by body tissue with pulsing blood and a pulse recognition output providing information regarding pulses within said waveform input, said processor comprising:

• a candidate pulse portion that determines a plurality of potential pulses within said waveform input;
• and
• a physiological model portion that determines the physiologically acceptable ones of said pulses, wherein said physiological model portion comprises a component that disregards ones of said potential pulses that are generally asymmetric.

A processor having a plethysmograph waveform input resulting from light attenuated by body tissue with pulsing blood and a pulse recognition output providing information regarding pulses within said waveform input, said processor comprising:

• a candidate pulse portion that determines a plurality of potential pulses within said waveform input;
• and
• a physiological model portion that determines the physiologically acceptable ones of said pulses, wherein said physiological model portion comprises a component that disregards ones of said potential pulses that have a descending trend that is generally slower than a subsequent ascending trend.

A processor having a plethysmograph waveform input resulting from light attenuated by body tissue with pulsing blood and a pulse recognition output providing information regarding pulses within said waveform input, said processor comprising:

• a candidate pulse portion that determines a plurality of potential pulses within said waveform input;
• and
• a physiological model portion that determines the physiologically acceptable ones of said pulses, wherein said physiological model portion comprises a component that disregards ones of said potential pulses having a signal strength that differs from a short-term average signal strength by greater than a predetermined amount.

A pulse recognition processor comprising:

• a candidate pulse subprocessor means for identifying potential pulses in an input waveform and providing a triangular waveform output;
• a plethysmograph model subprocessor means for determining physiologically acceptable pulses in said triangular waveform output and providing as a pulse output the indices of acceptable pulses.