Pulse ox 3301 3


Pulse oximetry is a non-invasive method allowing the monitoring of the oxygenation of a patient's hemoglobin. A sensor is placed on a thin part of the patient's anatomy, usually a fingertip or earlobe, or in the case of a neonate, across a foot, and a light containing both red and infrared wavelengths is passed from one side to the other. Changing absorbance of each of the two wavelengths is measured, allowing determination of the absorbances due to the pulsing arteria blood alone, excluding venous blood, skin, bone, muscle, fat, and (in most cases) fingernail polish. Based upon the ratio of changing absorbance of the red and infrared light caused by the difference in color between oxygen-bound (bright red) and oxygen unbound (dark red or blue, in severe cases) blood hemoglobin, a measure of oxygenation (the per cent of hemoglobin molecules bound with oxygen molecules) can be made.

Maintenance Data

Listed are recommended maintenance cycles that can be loaded within local computerized maintenance management systems. These cycles can also be used to estimate average monthly cycle inspections, PMs, and calibrations with average technician hours. Disclaimer: It is recommended to consult OEM cycles.

Maintenance cycles (in months) with estimated technician hours (in minutes)
Months Minute(s) Risk Level
Safety Inspection (INSP) 12 15 Moderate
Preventive Maintenance (PM) 0 0 N/A
Calibration (CAL) 12 30 N/A
Schedule Parts Replacement (SPR) 0 0 N/A
Acceptance Inspection (AI) 0 120 N/A



NPB-40 - Nellcor Puritan Bennet

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