Abstract
Acute kidney injury (AKI) is common following cardiopulmonary bypass. Fontan completion may result in systemic venous hypertension and low cardiac output, reducing renal perfusion pressure (RPP) and further increasing the risk of AKI. We investigated the incidence and risk factors for post-Fontan AKI. Single-center retrospective study of children undergoing Fontan completion from 2005 to 2012. Demographic and hemodynamic variables were assessed for association with AKI. Subgroup analysis was performed on patients with high-grade AKI (creatinine increase of ≥2.0 × baseline). Vital sign data were collected hourly for the first postoperative day. A total of 186 patients underwent Fontan at 3.1 (2.5-3.8) years of age and 13.5 kg (12.2-15.1). Acute kidney injury occurred in 97 (52%) patients, with high-grade AKI in 52 (28%). Univariate analysis identified reduced RPP in patients with AKI compared to those without AKI, 50 (45-56) mm Hg versus 58 (54-61) mm Hg ( P < .0001), due to lower mean arterial blood pressure, 63 (60-69) versus 70 (66-73) mm Hg ( P < .0001), and higher central venous pressure, 14 (12-16) versus 13 (11-14) mm Hg, ( p < .0001). Multivariable logistic regression and classification tree analyses further identified e...Continue Reading
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