• Ann Card Anaesth · Jan 2017

    Incidence and progression of cardiac surgery-associated acute kidney injury and its relationship with bypass and cross clamp time.

    • Habib Md Reazaul Karim, Mohd Yunus, Manuj Kumar Saikia, Jyoti Prasad Kalita, and Mrinal Mandal.
    • Department of Anaesthesiology, Andaman and Nicobar Island Institute of Medical Sciences, Port Blair, India.
    • Ann Card Anaesth. 2017 Jan 1; 20 (1): 22-27.

    IntroductionCardiac surgery-associated kidney injury (CSA-AKI) is common but relatively less is known about its progression. The present study is aimed at evaluating the incidence and course of CSA-AKI and its relationship with the different durations of cardiopulmonary bypass (CPB) and cross clamp times.Materials And MethodsOccurrences of CSA-AKI are evaluated as per the Akin Kidney Injury Network (AKIN) criteria over the course of 5 postoperative day (POD) in 100 patients. The relationship of different durations of CPB and aortic cross clamp time with CSA-AKI is analyzed by Chi-squared test for trend and other appropriate tests using INSTAT software.ResultsOne hundred (43 male, 57 female; mean age of 37.01 ± 12.28 years, and baseline mean serum creatinine 0.99 ± 0.20 mg %) patients undergone mostly valve replacement, and congenital heart disease correction was evaluated. Nearly 49% suffered CSA-AKI (81.63% AKIN Class I) with maximum numbers on 2 nd POD. Serum creatinine followed a falling trend 3 rd POD onward except in 8.16% cases of CSA-AKI. Oliguria was absent even in AKIN Class II. The CPB time >70 min and cross clamp time >60 min increase CSA-AKI risk by an OR of 4.76 and 2.84, respectively (P < 0.05).ConclusionCSA-AKI is very prevalent; mostly of AKIN Class I and increases with increasing CPB and cross clamp time. Urine output is not a reliable indicator of CSA-AKI. The AKIN Class II on the very 1 st POD or increasing trend of serum creatinine beyond 3 rd POD should alert for early intervention.

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