A Patient,age 22,is Admitted with Acute Asthma

A patient,age 22,is admitted with acute asthma.The patient shows a pulse oximetry level of SaO₂ of 82%.How should the nurse interpret this?

A) Only 82% of the red blood cells are able to use oxygen.
B) There is only 82% of oxygen bound to the hemoglobin compared with the amount available.
C) Eighteen percent of oxygen is not dissolved in the blood.
D) The muscular respiratory effort is only 18% effective.