An outpatient scheduled for an arterial blood sample enters the pulmonary lab 20 min late and out of breath, having run up four flights of stairs. What should you do?
a. Postpone the blood sample until tomor-row.
b. Scold the patient for being so late.
c. Wait 5 min before taking the sample.
d. Scold the patient for using the stairs.
ANS: C
Patients with healthy lungs achieve a steady state in only 5 min after changes, whereas those with chronic obstructive pulmonary disease may require as long as 20 to 30 min.
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