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Veterinary surgery : VS · Jan 2006
Randomized Controlled Trial Multicenter StudyIntravenous continuous infusion of lidocaine for treatment of equine ileus.
- Erin Malone, Jos Ensink, Tracy Turner, Julie Wilson, Frank Andrews, Kevin Keegan, and Jonathan Lumsden.
- Department of Veterinary Population Medicine, University of Minnesota, Minneapolis, MN 55108, USA. malon001@tc.umm.edu
- Vet Surg. 2006 Jan 1;35(1):60-6.
ObjectiveTo determine if intravenous lidocaine is useful and safe as a treatment for equine ileus.Study DesignProspective double-blinded placebo-controlled trial.Study PopulationHorses (n = 32) with a diagnosis of postoperative ileus (POI) or enteritis and that had refluxed >20 L or had been refluxing for >24 hours.MethodsRefluxing horses were administered lidocaine (1.3 mg/kg intravenously [IV] as a bolus followed by a 0.05 mg/kg/min infusion) or saline (0.9% NaCl) solution placebo for 24 hours. Variables evaluated included volume and duration of reflux, time to 1st fecal passage, signs of pain, analgesic use, heart rate and arrhythmias, respiratory rate, temperature, days of hospitalization, outcome (survival to discharge), and complications.ResultsOf the lidocaine-treated horses, 65% (11/17) stopped refluxing within 30 hours (mean+/-SD, 15.2+/-2.4 hours) whereas 27% (4/15) of the saline-treated horses stopped within 30 hours. Fecal passage was significantly correlated with response to treatment; horses that responded to lidocaine passed feces within 16 hours of starting the infusion. Compared with placebo treatment, lidocaine treatment resulted in shorter hospitalization time for survivors, equivalent survival to discharge, no clinically significant changes in physical or laboratory variables, and no difference in the rate of incisional infections, jugular thrombosis, laminitis, or diarrhea. Muscle fasciculations occurred in 3 lidocaine-treated horses (18%).ConclusionIV lidocaine significantly improved the clinical course in refluxing horses with minimal side effects.Clinical RelevanceAt the infusion rate studied, IV lidocaine is safe and should be considered for the treatment of equine ileus.
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