Clinical utility of estimation of glomerular filtration rate in dogs. (2nd August 2019)

• Record Type: Journal Article
• Authors: McKenna, Myles; Pelligand, Ludovic; Elliott, Jonathan; Walker, David; Jepson, Rosanne
• Is Part Of: Journal of veterinary internal medicine. Volume 34:Number 1(2020)
• Page Start: 195
• Page End: 205
• Publication Date: 2019-08-02
• Subjects: canine -- diagnosis -- iohexol clearance -- renal; Veterinary medicine -- Periodicals; 636.0896
• DOI: 10.1111/jvim.15561
• Languages: English
• ISSNs: 0891-6640

Abstract

Abstract: Background: Glomerular filtration rate (GFR) estimation is the gold standard for assessment of renal function, although the clinical utility of this test is unclear. Objectives: To describe the clinical utility of GFR estimation in dogs. Animals: Medical records of 132 dogs that had serum iohexol clearance measured between 2012 and 2017. Methods: Iohexol clearance and clinical records were reviewed and submitting practices contacted to obtain outcome data. Dogs were classified into 4 groups based on the reason for performing GFR estimation: A1 (screening for pre‐azotemic chronic kidney disease [CKD], n = 105), A2 (confirmation of azotemic CKD, n = 3), B (screening for pre‐azotemic acute kidney injury, n = 19), and C (miscellaneous causes, n = 5). Descriptive review of the clinical utility of GFR estimation is provided. Results: For dogs in Group A1, renal disease was diagnosed in 9/9 dogs with a GFR ≥40% decreased below the mean GFR of their body weight category, in 5/6 dogs with a ≥30% but <40% reduction in GFR and in 7/9 dogs with a ≥20% but <30% reduction in GFR. Conclusions and Clinical Importance: Glomerular filtration rate estimation is useful for the diagnosis of CKD before the onset of azotemia.