Measurement of oxygen saturation by a pulse oximeter can be adversely affected by which of the following?
1)Hypobilirubinemia
2)Peripheral vasodilation
3)Hypothermia
4)Dapsone

Question

Quizplus · Accepted Answer

Hypothermia causes a low perfusion state,which interferes with the accuracy of a pulse oximeter.Dapsone,an antibiotic used to treat malaria and Pneumocystis carinii,can cause increased levels of metHb,which interferes with the proper function of a pulse oximeter.Hypobilirubinemia is a low bilirubin blood level and will not interfere with a pulse oximeter.Peripheral vasodilation will cause more blood to circulate through the extremities,which is good for pulse oximetry.Peripheral vasoconstriction will affect pulse oximetry readings because low perfusion states are associated with a diminished pulsatile signal,resulting in an intermittent or absent SpO₂ reading.

Measurement of Oxygen Saturation by a Pulse Oximeter Can Be