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Harper KC, Salameh JP, Akhlaq N, McInnes MDF, Ivankovic V, Beydoun MH, Clark EG, Zeng W, Blew BDM, Burns KD, Sood MM, Bugeja A. The impact of measuring split kidney function on post-donation kidney function: A retrospective cohort study. PLoS One 2021; 16:e0253609. [PMID: 34214103 PMCID: PMC8253423 DOI: 10.1371/journal.pone.0253609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 06/08/2021] [Indexed: 11/30/2022] Open
Abstract
Background Studies have reported agreement between computed tomography (CT) and renography for the determination of split kidney function. However, their correlation with post-donation kidney function remains unclear. We compared CT measurements with renography in assessment of split kidney function (SKF) and their correlations with post-donation kidney function. Methods A single-centre, retrospective cohort study of 248 donors from January 1, 2009-July 31, 2019 were assessed. Pearson correlations were used to assess post-donation kidney function with renography and CT-based measurements. Furthermore, we examined high risk groups with SKF difference greater than 10% on renography and donors with post-donation eGFR less than 60 mL/min/1.73m2. Results 62% of donors were women with a mean (standard deviation) pre-donation eGFR 99 (20) and post-donation eGFR 67 (22) mL/min/1.73m2 at 31 months of follow-up. Post-donation kidney function was poorly correlated with both CT-based measurements and renography, including the subgroup of donors with post-donation eGFR less than 60 mL/min/1.73m2 (r less than 0.4 for all). There was agreement between CT-based measurements and renography for SKF determination (Bland-Altman agreement [bias, 95% limits of agreement] for renography vs: CT volume, 0.76%, -7.60–9.15%; modified ellipsoid,1.01%, -8.38–10.42%; CC dimension, 0.44%, -7.06–7.94); however, CT missed SKF greater than 10% found by renography in 20 out 26 (77%) of donors. Conclusions In a single centre study of 248 living donors, we found no correlation between CT or renography and post-donation eGFR. Further research is needed to determine optimal ways to predict remaining kidney function after donation.
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Affiliation(s)
- Kelly C. Harper
- Department of Radiology, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
| | - Jean-Paul Salameh
- Ottawa Hospital Research Institute Clinical Epidemiology Program, Ottawa, Ontario, Canada
| | - Natasha Akhlaq
- Department of Radiology, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
| | - Matthew D. F. McInnes
- Department of Radiology, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
- Ottawa Hospital Research Institute Clinical Epidemiology Program, Ottawa, Ontario, Canada
| | | | - Mahdi H. Beydoun
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Edward G. Clark
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Wanzhen Zeng
- Division of Nuclear Medicine, Department of Medicine, University of Ottawa, The Ottawa Hospital, Ottawa, Ontario, Canada
| | - Brian D. M. Blew
- Division of Urology, Department of Surgery, The Ottawa Hospital, University of Ottawa, Ottawa, Ontario, Canada
| | - Kevin D. Burns
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Manish M. Sood
- Ottawa Hospital Research Institute Clinical Epidemiology Program, Ottawa, Ontario, Canada
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Ann Bugeja
- Division of Nephrology, Department of Medicine, Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
- * E-mail:
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