When should you use an ear lobe probe? - ProProfs Discuss
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When should you use an ear lobe probe?



A. Cyanide poisoning
B. Poor peripheral circulation
C. Carbon monoxide poisoning
D. Emergency situations
E. Patients with carbon dioxide retention
Asked by Elston on Sep 09, 2016

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1 Answer

John Smith

John Smith

Answered on Sep 09, 2016

Poor peripheral circulation-poor peripheral circulation leads to false reading due to the lack of haemoglobin in the extremities. the earlobe is more central so retains its blood supply. cyanide and co will give false readings from any probe due to thier effect on haemoglobin. co binds to haemoglobin to form carboxyhaemoglobin which cannot be distinguished from oxyhaemoglobin by oximetry. oximetry will indicate a higher % arterial saturation of oxygen than is actually present. oximetry should be applied as soon as possible in an emergency and regularly monitored to ensure early management of hypoxaemia.
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