During adult venoarterial bypass ECLS, which vessels or heart chambers are commonly cannulated to feed venous blood from the patient's body to the pump, and to return arterial blood to the patient?
A. venous feed = right atrium; arterial return = aortic arch
B. venous feed = inferior vena cava; arterial return = subclavian artery
C. venous feed = internal jugular vein; arterial return = aortic arch
D. venous feed = right atrium; arterial return = subclavian artery
ANS: A
A. Correct response: Adult patients undergoing venoarterial extracorporeal support typically require alteration of the neonatal-pediatric procedure. Adults commonly undergo transthoracic access to the right atrium and aortic arch, or the femoral artery. Venoarterial ECLS is almost complete cardiopulmonary bypass, draining venous return from the right atrium, circulating the blood through extracorporeal circuit, and then returning the blood to the body via the aortic arch.
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A.
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