Before performing puncture or cannulation of the radial artery, what should you do?
a. Fix and tighten a tourniquet above the an-tecubital fossa.
b. Perform the Allen test to ensure collateral circulation.
c. Inject heparin into the adjoining subcuta-neous tissues.
d. Apply firm pressure to the arterial site for 5 min.
Question 2
How long should you wait before drawing an ABG on a chronic obstructive pulmonary disease (COPD) patient whose FiO2 has just been changed?
a. 5 to 10 min
b. 10 to 15 min
c. 15 to 20 min
d. 20 to 30 min