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Copyright ©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Nephrol. Nov 29, 2020; 9(2): 18-32
Published online Nov 29, 2020. doi: 10.5527/wjn.v9.i2.18
Kidney injury in COVID-19
Adeel Rafi Ahmed, Chaudhry Adeel Ebad, Sinead Stoneman, Muniza Manshad Satti, Peter J Conlon
Adeel Rafi Ahmed, Chaudhry Adeel Ebad, Sinead Stoneman, Department of Nephrology, Beaumont Hospital, Dublin D09 V2N0, Ireland
Muniza Manshad Satti, Department of Medicine, Connolly Hospital, Dublin D15X40D, Ireland
Peter J Conlon, Department of Nephrology, Beaumont Hospital and Royal College of Surgeons in Ireland, Dublin D09 V2N0, Ireland
Author contributions: Ahmed AR conceived and designed the study, performed literature review and analysis, drafted and critically revised and edited the manuscript and approved the final version; Ebad CA contributed to the section on management of renal transplant recipients in coronavirus disease 2019, final editing and critical analysis of the article; Stoneman S contributed to the section on direct viral invasion of renal parenchyma, final editing and critical analysis of the article; Satti MM contributed to the literature review for the pathophysiology of acute kidney injury in acute respiratory distress syndrome, final editing and critical analysis; Conlon PJ contributed and supervised with conception and design of the study, literature review and analysis, drafting and critical revision and editing and final approval of the final version.
Conflict-of-interest statement: No potential conflicts of interest.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Adeel Rafi Ahmed, MBChB, MRCP, Staff Physician, Department of Nephrology, Beaumont Hospital, Dublin 9, Dublin D09 V2N0, Ireland. adeel.r.ahmed@gmail.com
Received: June 25, 2020
Peer-review started: June 25, 2020
First decision: August 22, 2020
Revised: October 3, 2020
Accepted: October 20, 2020
Article in press: October 20, 2020
Published online: November 29, 2020
Processing time: 152 Days and 16.3 Hours
Abstract

Coronavirus disease 2019 (COVID-19) continues to affect millions of people around the globe. As data emerge, it is becoming more evident that extrapulmonary organ involvement, particularly the kidneys, highly influence mortality. The incidence of acute kidney injury has been estimated to be 30% in COVID-19 non-survivors. Current evidence suggests four broad mechanisms of renal injury: Hypovolaemia, acute respiratory distress syndrome related, cytokine storm and direct viral invasion as seen on renal autopsy findings. We look to critically assess the epidemiology, pathophysiology and management of kidney injury in COVID-19. 

Keywords: COVID-19; SARS-CoV-2; Acute kidney injury; Cytokine storm; Acute respiratory distress syndrome; Renal replacement therapy

Core Tip: Kidney injury in coronavirus disease 2019 (COVID-19) is associated with increased mortality with hypovolaemia, acute respiratory distress syndrome (ARDS), cytokine storm and direct viral invasion having a prominent pathophysiological role. Haematuria and proteinuria are present in a high proportion of cases reflecting possible glomerular involvement, and collapsing glomerulopathy has also been reported in genetically predisposed patients. This is further supported by autopsy findings showing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in proximal tubules and podocytes. Evidence supports a conservative fluid management strategy in COVID-19 associated ARDS with standard indications for renal replacement therapy. Hypercoagulation is a prominent feature leading to filter clotting, thus regional citrate anticoagulation should be used. Kidney transplant recipients with COVID-19 should have immunosuppression reduced.