What influences post-operative opioid requirements for tibial fractures?

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Introduction Currently there are few opioid prescribing guidelines for orthopaedic fractures. Long-term post-surgical analgesia requirements, understandably, vary between orthopaedic cases. Our study aims to provide detailed information to clinicians and policy makers, on the opioid requirement associations for patients sustaining tibial fractures. Methods This study reviewed all patients sustaining an isolated tibial fracture at a major trauma centre that were operated on within 1 month of injury, from 2015 to 2022. The total opioid dosage used each month in morphine milligrams equivalents (MME) and the number of days opioids were used each month, within the first-year post-surgery were collected, representing the strength and coverage of opioid analgesia in the post-operative stage, respectively. We compared opioid strength and coverage requirements with types of definitive fracture fixations, location, fracture type and concurrent patient medical comorbidities to assess for any trends. Results A total of 1814 patients sustaining a combined of 1970 fractures were included in the study. Tibial plateau fractures had the highest opioid strength and coverage requirements in each month and the entire year ( p < .05). Across all fracture locations, Ex Fix frame showed higher opioid strength and coverage requirements compared to both IM nailing and plate ORIF. With regard to opioid coverage in the presence of specific comorbidities, only chronic kidney disease (quotient: 1.37, 95% Confidence interval [95%CI] = 1.19–1.55, p = .002) and hypertension (quotient: 1.34, 95%CI = 1.14–1.53, p = .009) showed significance at the 1-year overall level. For opioid strength, Chronic Kidney Disease (quotient: 1.72, 95%CI = 1.41–2.03 p = .005) and COPD (quotient: 1.90, 95%CI = 1.44–2.36, p = .014), show significance at the 1-year overall level. Conclusion Our study details opioid requirements post-surgery amongst tibial fractures with subgroup analysis assessing opioid needs amongst specific fracture locations, types, surgical techniques and medical comorbidities. This framework aids clinicians in anticipating rehabilitation and assists in risk stratifying patients at injury onset.

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