( ( ( ( A ( blood ( pressure cuff ) ) ) or ) sphygmomanometer ) ( ( is ( used ( to ( measure ( blood pressure ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN blood) (NN pressure) (NN cuff)) (CC or) (NP (NN sphygmomanometer))) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NN blood) (NN pressure))))))) (. .)))
A blood pressure cuff or sphygmomanometer is used to measure blood pressure.
(ROOT (S (NP (NNP Sphygmomanometer)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB measure) (NP (NN blood) (NN pressure))))))) (. .)))