Cardiopulmonary Bypass Clinical Trial
Official title:
Prognostic Value of Peak Lactate During Cardiopulmonary Bypass in Adult Cardiac Surgeries: a Cohort Study
Tissue hypoperfusion during cardiopulmonary bypass (CPB) affects cardiac surgical outcomes.
Lactate, an end product of anaerobic glycolysis from oxygen deficit, is an obtainable marker
of tissue hypoxia. The investigators aimed to determine the value of blood lactate level
during CPB in adult cardiac surgeries in predicting outcomes.
The investigators retrospectively reviewed the patients underwent cardiac surgeries with CPB
from January 2015 to December 2015. The patient's characteristics, pre-operative status,
surgical type, and intra-operative lactate levels were collected. The outcomes were
in-hospital mortality and complications. Receiver operating characteristics (ROC) curves were
used to assess the ability of peak lactate level during CPB to predict in-hospital mortality.
The baseline characteristics, including age, gender, body mass index (BMI), comorbidities, left ventricular ejection fraction (LVEF, %), European system for cardiac operative risk evaluation II (EuroSCORE II), pre-operative hematocrit, and serum creatinine levels were recorded. The surgical type was classified as coronary artery bypass grafting (CABG), valve surgery, combined surgery including CABG and valve surgery, great vessel surgery including aortic dissection, and other surgeries. The priority of surgery was classified as elective, urgent, and emergent. The intra-operative variables included CPB time, aortic cross-clamp time, initial lactate level at the beginning of the operation, and the peak lactate level during CPB. ;
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