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Background
Acute kidney injury (AKI) is common after cardiac surgery requiring cardiopulmonary bypass. Renal hypoxia may precede clinically detectable AKI. We compared the efficacy of two indices of renal hypoxia, (i) intraoperative urinary oxygen tension (UPO2) and (ii) the change in plasma erythropoietin (pEPO) during surgery, in predicting AKI. We also investigated whether the performance of these...
Aim
Urinary oxygen tension (uPO2) may provide an estimate of renal medullary PO2 (mPO2) and thus risk of acute kidney injury (AKI). We assessed the potential for variations in urine flow and arterial PO2 (aPO2) to confound these estimates.
Methods
In 28 sheep urine flow, uPO2, aPO2 and mPO2 were measured during development of septic AKI. In 65 human patients undergoing cardiac surgery requiring...
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