He felt this was likely due to fluid overload but did not improve with dialysis.
 The patient has normal functioning kidneys.
(ROOT (S (NP (PRP He)) (VP (VBD felt) (SBAR (S (NP (DT this)) (VP (VP (VBD was) (ADJP (RB likely) (JJ due) (PP (TO to) (NP (NN fluid) (NN overload))))) (CC but) (VP (VBD did) (RB not) (VP (VB improve) (PP (IN with) (NP (NN dialysis))))))))) (. .)))
(ROOT (S (NP (DT The) (NN patient)) (VP (VBZ has) (NP (JJ normal) (VBG functioning) (NNS kidneys))) (. .)))
( He ( ( felt ( this ( ( ( was ( likely ( due ( to ( fluid overload ) ) ) ) ) but ) ( ( did not ) ( improve ( with dialysis ) ) ) ) ) ) . ) )
( ( The patient ) ( ( has ( normal ( functioning kidneys ) ) ) . ) )