A Hospitalized Patient Is Complaining of Shortness of Breath, but the Student

Multiple Choice

A hospitalized patient is complaining of shortness of breath, but the student does not notice cyanosis. The patient's hemoglobin is 9 g/dL, so the student asks the healthcare professional to explain. The professional tells the student that what amount of hemoglobin must be desaturated before cyanosis occurs?

A) 3
B) 5
C) 7
D) 9