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The following statements for the first stage (Norwood) repair of HLHS are
correct EXCEPT:

a) A goal for the surgical repair is limiting pulmonary blood flow

b) Aorto-pulmonary runoff occurs with the RV to PA conduit

c) Survival rates following the repair are above 70%

d) Aortic arch reconstruction is performed

e) Postoperative SpO2 is approximately 75-80%

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==Answer==
Answer b. 

Aorto-pulmonary runoff occurs in the Norwood procedure with MBTS,
and is further exacerbated by factors that reduce PVR. The runoff results in a fall
in coronary perfusion pressure and places the ventricle at risk of ischemia.
Prevention of aortopulmonary runoff is a major benefit of RV to PA conduit
creation. The other statements are all correct.



==Notes==
<references />
:This question originally printed in the [http://www.amazon.com/Justin-L.-Lockman/e/B00FLG5AEE/ref=ntt_dp_epwbk_0 Pediatric Anesthesiology Review Topics] kindle book series, and appears courtesy of Naerthwyn Press, LLC.

==Keywords==
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