title: Renal dimensions at ultrasonography in healthy Ragdoll cats with normal kidney morphology: correlation with age, gender and bodyweight.
abstract: Fifty-six healthy Ragdoll cats underwent an ultrasonographical examination of the urinary tract to evaluate if gender, age, bodyweight and presence of a medullary rim sign had a significant influence on renal length and corticomedullary ratio (CM). Individual variation percentage was much more pronounced for renal length in comparison with CM ratio. Mean renal length measured 3.83 ± 0.45 cm (range 2.98-5.09 cm), mean cortical thickness 0.73 ± 0.15 cm (range 0.36-1.18 cm), mean medullary thickness 0.87 ± 0.19 cm (range 0.46-1.39 cm) and mean CM ratio 0.88 ± 0.29 (range 0.29-1.78). Renal length showed a significant positive correlation with bodyweight (P <0.0001), age (P = 0.0073) and male gender (P <0.0001). Therefore, these parameters have to be kept in mind when evaluating renal length on ultrasound. The CM ratio was solely influenced by the presence of a medullary rim sign (P <0.0001). Further research, however, is needed to investigate the usefulness of the CM ratio for the detection of kidney disease by ultrasonography.
authors: 1Department of Veterinary Medical Imaging and Small Animals Orthopaedics, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
authors: Katrien
authors: K
authors: Debruyn
authors: Dominique
authors: D
authors: Paepe
authors: Sylvie
authors: S
authors: Daminet
authors: Anaïs
authors: A
authors: Combes
authors: Luc
authors: L
authors: Duchateau
authors: Kathelijne
authors: K
authors: Peremans
authors: Jimmy H
authors: JH
authors: Saunders
mesh_terms: D000375:Aging; D000818:Animals; D001835:Body Weight; D002415:Cats / Q000033:anatomy & histology*; D005260:Female; D007668:Kidney / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D008297:Male; D014463:Ultrasonography
references: J Small Anim Pract. 2012 Oct;53(10):572-7
references: 22860918
references: J Vet Sci. 2008 Dec;9(4):415-9
references: 19043318
references: J Feline Med Surg. 2013 Oct;15(10):849-57
references: 23413268
references: Clin Nephrol. 2010 Jul;74(1):46-52
references: 20557866
references: AJR Am J Roentgenol. 2010 Aug;195(2):W146-9
references: 20651174
references: Am J Vet Res. 1987 Apr;48(4):600-7
references: 3296882
references: Am J Vet Res. 1987 Apr;48(4):596-9
references: 3296881
references: Am J Vet Res. 1989 Jun;50(6):860-3
references: 2475043
references: J Am Vet Med Assoc. 1988 Jan 1;192(1):92-8
references: 3277935
references: Am J Vet Res. 2000 Sep;61(9):1016-20
references: 10976729
references: BMC Urol. 2009 Dec 23;9:19
references: 20030823
references: AJR Am J Roentgenol. 1993 Jan;160(1):83-6
references: 8416654
references: Acta Radiol. 1995 Jul;36(4):399-401
references: 7619620
references: Kaibogaku Zasshi. 1993 Oct;68(5):504-12
references: 8279261
references: Acta Radiol Suppl. 1972;319:279-80
references: 4531193
references: Vet Radiol Ultrasound. 1999 May-Jun;40(3):242-5
references: 10519301
references: J Am Vet Med Assoc. 2004 Jul 1;225(1):46-54
references: 15239473