Türkan NABİYEVA, Sibel Yılmaz FERHATOĞLU, Nihan YAPICI

The effect of perioperative mean arterial pressure and fluid management on postoperative acute kidney injury: Prospective evaluation of 219 coronary artery bypass cases

Aim: In this article, we evaluated risk factors associated with cardiac surgery-related AKI, including the pathophysiology, potentialcauses of injury, and preventing modalities.Acute kidney injury (AKI) is a significant obstacle that is of remarkable attention aftercardiac surgical procedures. Perioperative AKI is independently correlated with an increase in morbidity, costs of treatment, prolongedhospitalization and increase in mortality.Material and Methods: Two hundred and nineteen patients who underwent coronary artery bypass grafting surgery from Aprilthrough June 2019 were enrolled in this prospective study. Left ventricle ejection fraction, complete blood count, and kidney functiontest (KFT) were evaluated preoperatively. And, in perioperative evaluation, aortic cross-clamp time, minimum hemoglobin value, andmean arterial pressure, the perioperative fluid type used were recorded. KFT were recorded at postoperatively and, patients with AKIwere identified using Kidney Disease Improving Global Outcomes classification.Results: Left ventricle ejection fraction of the patients who did not have AKI was significantly higher (p=0.009). A higher rate ofAKI was observed in perioperative colloid used patients (p=0.004). Perioperative MAP values were significantly lower in patientshaving AKI (p=0.002). There is also a positive correlation between the decrease in MAP value and the development of AKI.Conclusion: Improving factors effecting arterial blood flow of the kidney such as preoperative hemoglobin value, perioperative meanarterial pressure may restrain the risk of cardiac surgery-related AKI. Also, we found that the use of colloid solutions while cardiacsurgery was associated with more AKI. Based on this result; it is crucial managing perioperative fluid therapy more targeted andconsidering the personal data of the patients.

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