Ultrasonographic evaluation of renal dimension and resistive index in clinically healthy Korean domestic short-hair cats

Abstract

Renal length, height, width, resistive index (RI), size of cortex, and medulla were determined by renal ultrasonography in 50 healthy Korean domestic short-hair cats. In the sagittal plane, the renal length was 3.83 ± 0.51 cm (mean ± SD) in the left kidney and 3.96 ± 0.48 cm in the right kidney, whereas the renal height was 2.42 ± 0.27 cm in the left kidney and 2.36 ± 0.28 cm in the right kidney. In the transverse plane, the renal height was 2.42 ± 0.28 cm in the left kidney and 2.38 ± 0.27 cm in the right kidney, whereas the renal width was: 2.65 ± 0.35 cm in the left kidney and 2.63 ± 0.31 cm in the right kidney. In the dorsal plane, the renal length was 3.84 ± 0.53 cm in the left kidney and 3.97 ± 0.54 cm in the right kidney, whereas the renal width was 2.65 ± 0.34 cm in the left kidney and 2.66 ± 0.33 cm in the right kidney. There were no significant differences (p > 0.05) among the same structure sizes measured in different planes. In the sagittal plane, the size of the renal cortex was 0.47 ± 0.08 cm in the left kidney and 0.47 ± 0.08 cm in the right kidney, whereas of the size of the renal medulla was 0.55 ± 0.30 cm in the left kidney and 0.50 ± 0.07 cm in the right kidney. RI evaluated by pulsed wave Doppler sonography was 0.52 ± 0.05 in the left kidney and 0.55 ± 0.05 in the right kidney. The actual renal dimensions determined by gross examination were not statistically different from those determined by ultrasonography. Furthermore the renal dimensions and RI were statistically correlated to the body weight of cats.

Is there a difference between the right and left kidney? A macroscopic approach in Brazilian Shorthair Cat

“…Previous ultrasonographical studies have reported that the normal size of the feline kidney varies between 3.0 and 4.3cm, and can even be up to 5.3cm (Walter et al, 1987, Park et al, 2008. The result obtained in Ragdoll cats (Debruyn et al, 2013) of 3.83 ± 0.45cm (range 2.98-5.09) fits well within this interval and corresponds with the renal length found by Park et al (2008) in healthy Korean domestic shorthair cats. The results of the authors above are similar to that observed in our study.…”

The Evaluation of Renal Hemodynamics with Doppler Ultrasonography

“…Such findings may simply reflect the varied nature of the species and breed studies' inherent physiological qualities (Rawashdeh et al, 2001). Renal dimensions and intrarenal RI have been correlated to the body weight of cats (Park et al, 2008). Studies comping with the age-intrarenal RI relationship and renin-angiotension-7 aldosterone system are limited.…”

Doppler Ultrasonographic Estimation of Renal Resistive Index in Horse: Comparison Between Left and Right Kidneys

“…To determine the renal vascular resistance, resistive index (RI), determined by Doppler ultrasonography, is applied. In this view, increased RI values suggest a renal disease [14,15]. The renal arterial RI is defined as the ratio of the difference between maximum and minimum (end diastolic) flow velocity derived from the Doppler spectrum of intrarenal (segmental/interlobar) arteries.…”