Eficácia Clínica da Viscossuplementação Comparativamente ao Tratamento Conservativo Tradicional em Cães com Displasia Coxofemoral

Abstract

Viscosupplementation is one of the treatment modalities for osteoarthritis which consist in an intraarticular (IA) injection of hyaluronic composts. The aim of this randomized, double-blind study was to compare the clinical efficacy of viscosupplemantion with conventional conservative treatment (CCT) in dogs with hip dysplasia (HD). Fifteen dogs were distributed into two groups: HA (n=8): IA injection of hyaluronic acid (5-10 mg); Control (n=7): IA injection with saline solution (0.5-1.0 mL) in combination with a CCT using an oral nutraceutical (750-1000 mg, every 12 h, 90 days) and carprofen (2.2 mg/kg, every 12 h, 15 days). The clinical signs of HD were evaluated prior to treatment (baseline), 15, 30, 60, and 90 days after the IA injection by the veterinary using a score system and by the owners with a questionnaire about their dog s condition using the Canine Brief Pain Inventory (CBPI) and Helsinki Chronic Pain Index (HCPI). The data were analyzed using test unpaired-t, Mann-Whitney-U test and Friedman test, followed by post-hoc Dunn s test (P < 0.05). The scores measured by the veterinary decreased from 30 to 90 days in relation to the baseline in the HA group (P = 0.0005), and at 15 days in the Control group (P = 0.0003). The scores evaluated by veterinary and by CBPI were significantly lower in the HA than in the Control from 30 to 90 days. Compared with baseline, both groups had lower total CBPI scores from 60 to 90 days after IA injection respectively (P= 0.0145, HA and P = 0.0291, Control). The HCPI scores were significantly lower in the Control and HA groups at 15 and 90 days after treatment, respectively (P= 0.0054, HA and P = 0.041, Control). Both treatments reduced the clinical signs of HD, however better results were reached with viscosupplementation.