( It ( ( should ( ( ( be ( ( used ( with caution ) ) ( in ( patients ( with ( high ( total CO2 ) ) ) ) ) ) ) and ) ( ( buffer ( base secondary ) ) ( to ( primary ( respiratory acidosis ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (MD should) (VP (VP (VB be) (VP (VBN used) (PP (IN with) (NP (NN caution))) (PP (IN in) (NP (NP (NNS patients)) (PP (IN with) (NP (JJ high) (JJ total) (NN CO2))))))) (CC and) (VP (VB buffer) (NP (NN base) (JJ secondary)) (PP (TO to) (NP (JJ primary) (NN respiratory) (NNS acidosis)))))) (. .)))
It should be used with caution in patients with high total CO2 and buffer base secondary to primary 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))))))))))) (. .)))