Abstract:A number of hemostasis parameters were studied in a total of 63 patients undergoing cardiopulmonary bypass (CPB) for open heart surgery. In 33 patients fibrinogen, Factors II, V, VIII:C, X, XI, antithrombin, plasminogen, alpha 2-antiplasmin, and platelet counts were assayed before surgery, during maximal hypothermia, at the end of the bypass procedure, before and after protamine sulfate infusion, in the intensive care unit, and 48 hours postoperatively. All factors assayed decreased markedly when the patients … Show more
“…[7]. Extracorporeal circulation and heparin may induce many abnormalities in the coagulation system, including thrombocytopenia [2], platelet dysfunction [8,9], coagulation factor deficiencies [10], residual heparin after protamine administration [11], and fibrinolysis [12]. Microvascular bleeding caused by dysfunctional platelets and an impaired coagulation cascade occur after CPB secondary to foreign surface contact [13].…”
“…[7]. Extracorporeal circulation and heparin may induce many abnormalities in the coagulation system, including thrombocytopenia [2], platelet dysfunction [8,9], coagulation factor deficiencies [10], residual heparin after protamine administration [11], and fibrinolysis [12]. Microvascular bleeding caused by dysfunctional platelets and an impaired coagulation cascade occur after CPB secondary to foreign surface contact [13].…”
“…15,16,19 Bleeding after CABG can be a combination of inadequate surgical hemostasis, coagulation, and platelet abnormalities. 20 Exposure to cardiopulmonary bypass (CPB) causes dilutional thrombocytopenia, 21,22 coagulopathy, 23 sheer-induced platelet dysfunction, 22,24 a systemic inflammatory response, and activation of plasminogen. 25,26 The safety and efficacy of off-pump CABG (OPCAB) have been confirmed through numerous reports.…”
Section: Editorial P 1638 Clinical Perspective P 1674mentioning
Background-Premedication with clopidogrel has reduced thrombotic complications after percutaneous coronary revascularization procedures. However, because of the enhanced and irreversible platelet inhibition by clopidogrel, patients requiring surgical revascularization have a higher risk of bleeding complications and transfusion requirements. A principal benefit of surgical coronary revascularization without cardiopulmonary bypass is its lower hemorrhagic sequelae. The purpose of this study was to evaluate the effect of preoperative clopidogrel administration in the incidence of hemostatic reexploration, blood product transfusion rates, morbidity, and mortality in patients undergoing off-pump coronary artery bypass graft surgery using a large patient sample and a risk-adjusted approach.
Methods and Results-Two
“…Initiation of cardiopulmonary bypass causes hemodilution of platelets and coagulation factors, as well as quantitative and qualitative platelet abnormalities that compromise an already poor hemostatic system in a patient with cirrhosis. 42 Anticoagulation with heparin may put the patient at further risk for bleeding. All these factors place a patient with cirrhosis at risk for gastrointestinal bleeding or bleeding related to surgical trauma.…”
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