Obstructive sleep apnea on C-PAP, 12 mm HG.
 The patient is overweight. 
(ROOT (NP (NP (JJ Obstructive) (NN sleep) (NN apnea)) (PP (IN on) (NP (NN C-PAP))) (, ,) (NP (CD 12) (NN mm) (NNP HG)) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ is) (ADJP (JJ overweight))) (. .)))
( ( ( ( ( Obstructive ( sleep apnea ) ) ( on C-PAP ) ) , ) ( 12 ( mm HG ) ) ) . )
( ( The patient ) ( ( is overweight ) . ) )