Preemptive kidney support: an optimal practice or a good theory?

Department of Cardiology and Cardiac Surgery, Pediatric Cardiac Intensive Care Unit, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy; Anaesthesia and Intensive Care, Emergency Department, Fondazione I.R.C.C.S. Policlinico S. Matteo, University of Pavia, Pavia, Italy; Department of Health Science, section of Anesthesiology and Intensive Care, University of Florence, Azienda Ospedaliero-Universitaria Careggi, Florence, Italy Correspondence to: Zaccaria Ricci. Department of Cardiology, Cardiac Surgery, and Pediatric Cardiac Intensive Care Unit, Bambino Gesù Children’s Hospital, IRCCS, Piazza S. Onofrio 4, 00165, Rome, Italy. Email: z.ricci@libero.it. Provenance and Peer Review: This article was commissioned by the Editorial Office, Annals of Translational Medicine. The article did not undergo external peer review. Comment on: Tu GW, Xu JR, Liu L, et al. Preemptive renal replacement therapy in post-cardiotomy cardiogenic shock patients: a historically controlled cohort study. Ann Transl Med 2019;7:534.