Thanks guys. She's handling it all well, has already set herself up as Princess of the Paeds ward, but her oxygenation is still not improving with treatment. My own uninformed concern is that she may have a shunt -- there were some concerns about her heart structure in utero, but they thankfully never came to anything after she was born. She was thoroughly checked out at Childrens' back then, but I wonder if her growth since might have made a very minor problem more apparent and I think I'm going to start bleating about getting her down there again.