Presentation on theme: "Pulse oximetry Pulse oximeter measures"— Presentation transcript:
1 Pulse oximetry Pulse oximeter measures The oxygen saturation of haemoglobin in arterial blood – which is a measure of the average amount of oxygen bound to each haemoglobin molecule.Average reading %Can be placed on finger or ear lobeThe pulse rate – in beats per minute , averaged over 5-20 seconds
3 Indications Monitoring effectiveness of oxygen therapy Sedation or anesthesiaHaemodynamic instability – AMI, CCfRespiratory illnessMonitoring during administration of respiratory depressant drugs
4 Inaccurate readings May be caused by A reduction in peripheral pulsatile blood flow produced by peripheral vasoconstriction (hypovolaemia).Severe hypotensionCold shiveringCCFSome cardiac arrhythmiasPVDNail varnish (may cause low readings)Bright fluorescent lighting
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