Validation of a portable ultrasound machine for estimating sole thickness in dairy cattle in New Zealand

New Zealand Veterinary Journal
L J LavenR A Laven

Abstract

The aim of the study was to validate the use of a portable ultrasound machine for monitoring sole thickness by investigating the agreement between ultrasound and electronic calliper measurement of distance from the external to the internal sole surface (sole thickness) and the distance from the external sole surface to the distal phalanx (DP). Distal limbs were collected post-mortem from 24 dairy cows. Measurements were made using a portable ultrasound machine (Mindray DP 6600) on both claws of the right hind and left front feet at the tip of the distal phalanx (site 1) and 25 mm towards the heel (site 2). DP and sole thickness were measured at each site. The limbs were then frozen and sectioned, and the same parameters measured using electronic callipers. The limits-of-agreement between the two methods were investigated, and receiver operator characteristic (ROC) analyses undertaken. Ultrasound images were obtained for 92 out of 96 claws. For sole thickness, as measured using callipers, the best correlation was with ultrasound-measured DP at site 1 (r=0.77). The mean difference between these two measures was 2.5 (SEM 0.15) mm and the range of the 95% limits-of-agreement was 4.2 mm. ROC analysis showed that a claw with an ultra...Continue Reading

References

Jun 1, 1978·New Zealand Veterinary Journal·H F Dewes
Feb 5, 1994·The Veterinary Record·E J PeelerR J Esslemont
Apr 26, 2001·The Veterinary Clinics of North America. Food Animal Practice·S R van Amstel, J K Shearer
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Aug 1, 2009·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Robert D Harris, William M Marks

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Citations

Apr 30, 2014·BMC Veterinary Research·Pryscilla V R GonçalvesNaida C Borges
Feb 19, 2014·The Veterinary Clinics of North America. Food Animal Practice·Johann KoflerAdrian Steiner
Jul 30, 2015·The Veterinary Record·S C ArcherJ N Huxley
Sep 2, 2015·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Tyler A Elliott, T Ryan Gregory
Nov 27, 2014·Archives of Disease in Childhood·Rebecca M HaymanStuart R Dalziel

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