PPHN & RH disease link?

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I just had a baby via unscheduled c-section at 37w5d on Aug 4. He is doing much better now, but at the beginning, we didn't know if he would make it. He was diagnosed with Persistent Pulmonary Hypertension, and put on the ECMO heart/lung bypass machine for 3 days. He also received 2 exchange transfusions. His indirect billirubin levels are low enough that they don't have him on the lights, but his direct billi levels are still a bit high and they have him on Phenobarbitol (not sure if that's the correct spelling) to help his liver process the billirubin.

I was diagnosed Rh sensitized to both C & D antibodies during pregnancy. My OB and I were a little surprised to find out he is having such problems with the anemia, since his last amnio showed the Delta OD levels to be in Zone 1 on June 30th. Ultrasound showed no effects of anemia.

Can the PPHN be linked to the Rh problem, or is it more likely a seperate issue altogether. My husband read that instances where there is a low oxygen level in the blood already (as was the case with my son), then the arteries in the lungs won't open up after childbirth.

Thanks for your help!

--
Amanda

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