From M& B's Blog:

Praise the Lord! Thank you for your prayers. The operation went well. Her blood pressure is up and they were able to insert a drainage tube into her lung while they were in there. They will remove it in a few days. The dr seems very optimistic that this will solve many, if not all, of her problems...including her need for the ventilator. Please pray this is true as it will mean we can start to hold her. She is not awake yet (still sedated - as we would all want to be after this) so keep praying she will come out of the anesthesia well.