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Renal resistive index as a diagnostic tool for chronic kidney disease in cats

I. Matos, P. Azevedo and L. M. Carreira

Journal of Feline Medicine and Surgery (2018) 20, 940–947

doi: 10.1177/1098612X17736656

• What did the research find?

The renal resistive index (RRI) was significantly higher in cats with chronic kidney disease (CKD) than in healthy cats, with an admissible cut-off of 0.639 for a preliminary diagnosis of CKD. Of all the parameters tested, only bodyweight was significantly correlated with RRI, and this correlation was negative. No differences were found between the left and right kidneys, suggesting that evaluation of only one kidney is sufficient to provide an estimate of the RRI value for both organs.

• How was it conducted?

This study included 24 cats of both sexes. Six were healthy, and 18 had CKD but did not have any concomitant diseases and were not being treated with any medications. The RRI was measured using colour Doppler ultrasound. The cats’ age, sex, bodyweight, …

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