Answer to Question 1
ANS: A
A. Correct response: In 1974, the national Institutes of Health sponsored a multicenter, randomized trial that compared venoarterial ECLS with conventional therapy in adults with respiratory failure. The results failed to show an improvement in outcome. Both ECLS and conventional therapy demonstrated a dismal survival rate, with no significant difference (9.5 survival rate on ECLS patients and 8.3 in the conventional group).
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A.
Answer to Question 2
ANS: D
A. Incorrect response: See explanation D.
B. Incorrect response: See explanation D.
C. Incorrect response: See explanation D.
D. Correct response: The first successful human ECLS case was reported in 1972, in which a 24-year-old male with multiple trauma injuries was supported for 75 hours.