( ( Blood pressure ) ( ( is ( measured ( using ( ( a manometer ) ( -LRB- ( sphygmomanometer -RRB- ) ) ) ) ) ) . ) )
(ROOT (S (NP (NN Blood) (NN pressure)) (VP (VBZ is) (VP (VBN measured) (S (VP (VBG using) (NP (NP (DT a) (NN manometer)) (PRN (-LRB- -LRB-) (NP (NN sphygmomanometer)) (-RRB- -RRB-))))))) (. .)))
Blood pressure is measured using a manometer (sphygmomanometer).
(ROOT (S (NP (NP (DT The) (NN pressure)) (PP (IN of) (NP (NP (DT a) (NN sample)) (PP (IN of) (NP (NN gas)))))) (VP (VBZ is) (VP (VBN measured) (PP (IN with) (NP (DT an) (JJ open-end) (NN manometer))))) (. .)))