Synovial fluid cavitation during distraction radiography of the coxofemoral joint in dogs

Elizabeth LaFond, Gail K. Smith, Thomas P. Gregor, Pamela J. McKelvie, Frances S. Shofer

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Objective - To determine risk factors for, and prevalence and short- and long-term effects of, synovial fluid cavitation during distraction radiography. Design - Multicenter prevalence survey. Animals - 6,649 purebred dogs comprising 129 breeds. Procedure - Radiographs from the PennHIP (University of Pennsylvania Hip Improvement Program) Laboratory were subjectively evaluated for evidence of cavitation. Multiple logistic regression was used to determine whether sex, breed, age, weight, distraction index (DI), or examining veterinarian was associated with cavitation. Short-term effects of cavitation were assessed by comparing DI for the hip with cavitation with DI for the contralateral hip in dogs with unilateral cavitation. Long-term effects of cavitation were assessed by comparing DI before and after cavitation was detected. Results - Cavitation was detected in 279 (4.2%) of the radiographs analyzed. Male dogs, Golden Retrievers, and heavier dogs were at a decreased risk for cavitation. Irish Wolfhounds, Irish Setters, Rhodesian Ridgebacks, and Weimaraners had an increased risk for cavitation. Age and DI were not risk factors for cavitation. Mean DI was 0.08 greater in hips with cavitation than in paired hips without cavitation. Significant differences were not detected between DI before and after cavitation, but only 7 dogs were included in this analysis. Clinical Implications - Cavitation is rare during distraction radiography and can increase measured DI. Radiographs should be routinely examined to ensure accurate reporting of DI.

Original languageEnglish (US)
Pages (from-to)1294-1297
Number of pages4
JournalJournal of the American Veterinary Medical Association
Volume210
Issue number9
StatePublished - May 1 1997

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