In ED, tachycardic, NGT placed and NG lavage was negative.
 the patient has a positive gastric lavage
(ROOT (S (PP (IN In) (NP (NNP ED))) (, ,) (JJ tachycardic) (, ,) (S (NP (NNP NGT)) (VP (VBD placed))) (CC and) (S (NP (NNP NG) (NN lavage)) (VP (VBD was) (ADJP (JJ negative)))) (. .)))
(ROOT (S (NP (DT the) (NN patient)) (VP (VBZ has) (NP (DT a) (JJ positive) (JJ gastric) (NN lavage)))))
( ( In ED ) ( , ( tachycardic ( , ( ( ( ( NGT placed ) and ) ( ( NG lavage ) ( was negative ) ) ) . ) ) ) ) )
( ( the patient ) ( has ( a ( positive ( gastric lavage ) ) ) ) )