You Obtain an SpO₂ Reading of 90% Using an Oximeter

Multiple Choice

You obtain an SpO₂ reading of 90% using an oximeter with an approximate accuracy of 5%. This could indicate a PO₂ as low as what level?

A) 55 mm Hg
B) 60 mm Hg
C) 65 mm Hg
D) 70 mm Hg