Abstract
Background
Delayed diagnosis of acute kidney injury (AKI) is common because the changes in renal function markers often lag injury. We aimed to find optimal non-invasive hemodynamic variables for the prediction of postoperative AKI and AKI renal replacement therapy (RRT).
Methods
The data were collected from 1,180 patients who underwent cardiac surgery in our hospital between March 2015 and Feb 2016. Postoperative central venous pressure (CVP), mean arterial pressure (MAP), heart rate, PaO2, and PaCO2 on ICU admission and daily fluid input and output (calculated as 24 h PFO) were monitored and compared between AKI vs. non-AKI and RRT vs non-RRT cases.
Results
The AKI and AKI-RRT incidences were 36.7% (n = 433) and 1.2% (n = 14). Low cardiac output syndromes (LCOSs) occurred significantly more in AKI and RRT than in non-AKI or non-RRT groups (13.2% vs. 3.9%, P < 0.01; 42.9% vs. 7.1%, P < 0.01). CVP on ICU admission was significantly higher in AKI and RRT than in non-AKI and non-RRT groups (11.5 vs. 9.0 mmHg, P < 0.01; 13.3 vs. 9.9 mmHg, P < 0.01). 24 h PFO in AKI and RRT cases were significantly higher than in non-AKI or non-RRT patients (1.6% vs. 0.9%, P < 0.01; 3.9% vs. 0.8%, P < 0.01). The areas under the ROC curves to predict postoperative AKI by CVP on ICU admission (> 11 mmHg) + LCOS + 24 h PFO (> 5%) and to predict AKI-RRT by CVP on ICU admission (> 13 mmHg) + LCOS + 24 h PFO (> 5%) were 0.763 and 0.886, respectively.
Conclusion
The volume-associated hemodynamic variables, including CVP on ICU admission, LCOS, and 24 h PFO after surgery could predict postoperative AKI and AKI-RRT.
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Acknowledgements
This work was supported by the Shanghai Key Laboratory of Kidney and Blood Purification (Grant number. 14DZ2260200); Shanghai Clinical Medical Center for Kidney Disease Project support by Shanghai Municipal Health Commission (Grant number. 2017ZZ01015); National Natural Science Foundation of China (Grant number. 81901939); Shanghai “science and technology innovation plan” popular science project (Grant number 19DZ2321400) and Xiamen Science and Technology Plan in 2018 (Grant number. 3502Z20184009).
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The ethical committee of the Shanghai Zhongshan Hospital approved the study (No. B2017-039) and our study was performed in accordance with the Declaration of Helsinki regarding the ethical principles for medical research involving human subjects.
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Xu, J., Jiang, W., Li, Y. et al. Volume-associated hemodynamic variables for prediction of cardiac surgery-associated acute kidney injury. Clin Exp Nephrol 24, 798–805 (2020). https://doi.org/10.1007/s10157-020-01908-6
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DOI: https://doi.org/10.1007/s10157-020-01908-6