2024 - 2025

Clinical Question: In elective cardiac surgeries requiring CPB, does an IV infusion of amino acids (isopuramin 10%) therapy at the time of surgery compared to placebo (LR) decrease the incidence of postoperative AKI in the first week?
Methods + Results: Multicenter RCT; The investigators measured baseline creatinine and defined a reasonable primary outcome, postoperative (0-7 days) AKI by KDIGO criteria. AKI had developed in 474 patients in the amino acid group (26.9%) and in 555 patients in the placebo group (31.7%) (RR = 0.85; 95% CI [0.77 to 0.94]; P=0.002). There were no differences in secondary outcome measures (Hospital and ICU LOS, RRT initiation, MV duration).
Take Away: IV amino acids may reduce the risk of AKI after elective cardiac surgery. The study was well-designed and executed, but had limitations in patient demographics (external generalizability) and lack of additional indicators of AKI.

Clinical Question: Does taking aspirin before coronary artery bypass surgery reduce the risk of death or thrombotic complications (nonfatal myocardial infarction, stroke, pulmonary embolism, renal failure, or bowel infarction)?
Methods + Results: After patients were randomized to aspirin or placebo and monitored for 30 days post coronary artery bypass surgery, the data showed that there were no significant differences in the primary outcome (death or thrombotic events) or secondary outcomes (death, myocardial infarction, renal failure, pulmonary embolism, bowel infarction, re-op for hemorrhage, cardiac tamponade).
Take Away: Aspirin is safe to use in the perioperative period of coronary artery bypass surgery.

Clinical Question: In adults under 75 years old undergoing elective cardiac surgery requiring CPB, does administration of high dose dexamethasone increase the number of home days after surgery and decrease the risk of serious complications?
Methods + Results: Patients were randomized prior to consent 2:1 favoring site standard of care, and followed for 30 days. In the treatment group, patients were administered one dose of dexamethasone 1mg/kg up (up to 100mg). There was no significant difference in the number of days alive and at home after surgery.
Take Away: High dose dexamethasone may decrease ICU LOS, but does not increase the number of alive and home days, nor significantly affect the risk of serious complications, after cardiac surgery.

Clinical Question: Does extracorporeal blood purification (EBP) during cardiopulmonary bypass (CPB) reduce the risk of acute kidney injury (AKI) after nonemergent cardiac surgery?
Methods + Results: In this double-blinded RCT, the investigators compared the rate of AKI by KDIGO criteria among cardiac surgery patients who underwent EBP through an acrylonitirile-sodium methallylsulfonate/polyethylenimine membrane during CPB vs those who underwent CPB only, finding a statistically significant reduction in AKI in the EBP cohort (28.4%, CI 21.7-35.8% vs 39.7%, CI 32.3-47.3, P = 0.03).
Take Away: This study demonstrates that EBP may reduce the risk of AKI after CPB, although the study is not sufficiently powered to determine whether secondary clinical outcomes are changed as a result, whether the outcome was due to the use of an EBP membrane vs the use of CRRT in which the membrane was inserted, or whether the use of EBP is economically justified for the clinical effect size.

Adult Cardiothoracic Anesthesiology