Integrated pulse oximetry sensor

A method of measuring blood oxygen comprising:

• emitting pulses of red light from a first LED mounted in a carriage housing adapted to fit snugly about a portion of a subject's anatomy with a relatively high oxygenated blood throughput;
• emitting pulses of infrared light from a second LED mounted in the carriage housing;
• receiving light from the LEDs which has traversed a blood oxygenated portion of a person with a photodiode integrally formed on a CMOS semiconductor chip mounted in the carriage housing and generating electrical signals;
• and
• on said CMOS semiconductor chip, digitizing the electrical signals from the photodiode and processing the digitized electrical signals into a blood oximetry value with an analog-to-digital converter and a processing circuit integrally formed on the CMOS semiconductor chip.

A medical pulse oximetry sensor comprising:

• a housing configured to fit a portion of a patient's anatomy with oxygenated blood throughput;
• a first light emitting diode mounted in the housing, the first light emitting diode emitting light of a first spectrum;
• a second light emitting diode mounted in the housing, the second light emitting diode emitting light of a second spectrum;
• an integrated CMOS semiconductor component chip mounted in the housing and including integrally formed thereon:
• a photodiode which detects light from the first and second light emitting diodes which has passed through the portion of the patient's anatomy,
• an amplifier which amplifies signals from the photodiode,
• an analog-to-digital converter which digitizes the amplified signals, and
• a light emitting diode controller which controls the first and second light emitting diodes.