In the subgroup of patients without pre-existing renal function impairment (preoperative creatinine \documentclass[12pt]{minimal}\usepackage{amsmath}\usepackage{wasysym}\usepackage{amsfonts}\usepackage{amssymb}\usepackage{amsbsy}\usepackage{mathrsfs}\usepackage{upgreek}\setlength{\oddsidemargin}{-69pt}\begin{document}$$\le $$\end{document}≤1.25 mg/dl), significantly increased serum SLPI was observed 12 and 24 hours post-interventionally in patients with AKI (Fig. 3). Here, SLPI is linked to acute kidney injury.