Valve Heart Disease Clinical Trial
Official title:
A Multicenter Prospective, Randomized Controlled Study of Different Transfusion Thresholds in Cardiac Valve Surgery
This prospective, randomized controlled study is aimed to figure out suitable transfusion threshold in patients undergoing cardiac valve surgery under cardiopulmonary bypass(CPB). Patients are randomly assigned to restrictive and liberal transfusion group and receive blood transfusion during and after surgery. Compare primary and secondary outcomes of two groups.
Patients are randomly assigned to restrictive-threshold group and liberal-threshold group before cardiac group. Patients are included in this research when their Hct meets 24% during CPB. Arterial blood gas analysis will be done in 0.5h, 1.5h, 2.5h, 3.5h...after CPB start and 0.5h before CPB finish. Arterial blood gas analysis will be done every 4h in intensive care unit(ICU) and everyday in general ward. Restrictive-threshold group: The transfusion threshold is Hemoglobin(Hb) ≤ 6.0g/dL or Hct ≤ 18% during CPB; postoperative Hb ≤ 7.0g/dL or Hct ≤ 21% in ICU or general ward. Liberal-threshold group: The transfusion threshold is Hb ≤ 8.0g/dL or Hct ≤ 24% during CPB; postoperative Hb ≤ 10.0g/dL or Hct ≤ 30% in ICU or general ward. If the Hb or Hct fall below the threshold at any time, 2 unit of blood cells is administered as soon as possible. Test Hb or Hct again, if is under the threshold 2 unit blood cells will be given until reach the threshold. ;
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