Unusual case of preoperative hypoxaemia Padraic C Ridge, Sarah Cullivan, Christina D Campbell, Anthony O'Regan, Robert M Rutherford Department of Respiratory Medicine, Galway University Hospitals, Galway, Ireland Correspondence to Dr Padraic C Ridge, Department of Respiratory Medicine, Galway University Hospitals, Galway, Ireland; p.macaniomaire1{at}gmail.com Statistics from Altmetric.com right to left cardiac shunt patent foramen ovale platypneoa orthodexia syndrome Clinical presentation An...