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Pulse oximetry Pulse oximeter measures The oxygen saturation of haemoglobin in arterial blood – which is a measure of the average amount of oxygen bound.

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Presentation on theme: "Pulse oximetry Pulse oximeter measures The oxygen saturation of haemoglobin in arterial blood – which is a measure of the average amount of oxygen bound."— 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 97-100% Can be placed on finger or ear lobe The pulse rate – in beats per minute, averaged over 5-20 seconds 1

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3 Indications Monitoring effectiveness of oxygen therapy Sedation or anesthesia Haemodynamic instability – AMI, CCf Respiratory illness Monitoring during administration of respiratory depressant drugs 3

4 Inaccurate readings May be caused by A reduction in peripheral pulsatile blood flow produced by peripheral vasoconstriction (hypovolaemia). Severe hypotension Cold shivering CCF Some cardiac arrhythmias PVD Nail varnish (may cause low readings) Bright fluorescent lighting 4


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