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Methylene blue does not neutralize heparin after cardiopulmonary bypass.

Abstract：

OBJECTIVE:It was hypothesized that methylene blue could neutralize heparin in patients after cardiopulmonary bypass and become an alternative to protamine. DESIGN:This was a prospective unblinded study with patients serving as their own controls. SETTING PARTICIPANTS: A single, large university hospital. This study was conducted in patients scheduled for elective aortocoronary bypass grafting. INTERVENTIONS:When heparin was to be neutralized, patients received methylene blue, 2 to 12 mg/kg, diluted in 50 mL and infused over 20 minutes. If a clot was not observed or the activated coagulation time (ACT) remained elevated, protamine, 250 mg, was administered and the ACT was repeated. MEASUREMENTS AND MAIN RESULTS:No patient demonstrated clot after methylene blue infusion. ACT did not return to preheparin values in any patient. All patients required protamine to establish hemostasis. Protamine restored the ACT to preheparin values in every patient. The one patient who received 12 mg/kg experienced severe pulmonary hypertension. CONCLUSIONS:Methylene blue does not neutralize heparin after cardiopulmonary bypass.

journal_name

J Cardiothorac Vasc Anesth

journal_title

Journal of cardiothoracic and vascular anesthesia

authors

Metz S,Horrow JC,Goel IP,Kuretu ML,Bellwoar C

doi

10.1016/s1053-0770(05)80007-2

subject

Has Abstract

pub_date

1996-06-01 00:00:00

pages

474-6

issue

4

eissn

1053-0770

issn

1532-8422

pii

S1053-0770(05)80007-2

journal_volume

10

pub_type

杂志文章

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