( ( Blood analysis ) ( ( reveals ( significant ( hypoxemia ( and ( respiratory acidosis ) ) ) ) ) . ) )
(ROOT (S (NP (NN Blood) (NN analysis)) (VP (VBZ reveals) (NP (JJ significant) (NN hypoxemia) (CC and) (NN respiratory) (NNS acidosis))) (. .)))
Blood analysis reveals significant hypoxemia and respiratory acidosis.
(ROOT (S (NP (JJ Respiratory) (NNS acidosis)) (VP (VBZ is) (VP (VBN considered) (S (VP (TO to) (VP (VB be) (ADJP (JJ problematic) (PP (IN because) (NP (NP (JJ excess) (NNS co2)) (PP (IN in) (NP (NN blood))))))))))) (. .)))