2022 article
Shear wave elastography evaluation of cats with chronic kidney disease
Appleby, R. B., Vaden, S. L., Monteith, G., & Seiler, G. S. (2022, November 2). VETERINARY RADIOLOGY & ULTRASOUND.
author keywords: feline chronic kidney disease; Shear wave elastography; ultrasound
MeSH headings : Animals; Cats; Case-Control Studies; Cat Diseases / diagnostic imaging; Elasticity Imaging Techniques / veterinary; Elasticity Imaging Techniques / methods; Quality of Life; Renal Insufficiency, Chronic / diagnostic imaging; Renal Insufficiency, Chronic / veterinary; Ultrasonography
TL;DR:
Shear wave elastography is not currently recommended as a tool to evaluate CKD in cats and further work is necessary, as there is no difference in shear wave velocities between groups and the intraclass correlation coefficient was only moderate.
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AbstractChronic kidney disease (CKD) is a major health condition in cats that can lead to poor quality of life and financial implications for therapy. Currently staging and identification of CKD is limited by diagnostic testing such as creatinine and urine‐specific gravity, which do not change until late in the disease course. Other methods to evaluate CKD would be valuable in the clinical setting. Shear wave elastography is one novel ultrasound method, which has shown promise in identifying increases in tissue stiffness and identifying CKD in people. As CKD is often histologically characterized by tubulointerstitial fibrosis, shear wave elastography has the potential to identify CKD and differentiate between stages of CKD in cats. This prospective observational case‐control study with 78 cats found no difference in shear wave velocities between groups (P = 0.33), a contradictory finding to one prior publication. There was no effect of weight (P = 0.65), nor the presence of mineralization (P = 0.31) or infarction (P = 0.52) on cortical shear wave velocities. There was a significant effect of age on shear wave velocity (P = 0.018) where velocities increased with age. The intraclass correlation coefficient was only moderate (0.62). Possible reasons for the difference in results between our work and that published prior, include differences in methodology and differences in instrumentation. Variability in measurements in our population may be due to the effects of respiratory motion or limitations in shear wave elastography software. As such, shear wave elastography is not currently recommended as a tool to evaluate CKD in cats and further work is necessary.