• Jennifer A Rabbitts, Cornelius B Groenewald, and Chuan Zhou.
• Department of Anesthesiology & Pain Medicine.
• Can J Pain. 2020 Jan 1; 4 (4): 3-12.

BackgroundAdolescents who undergo major surgery experience high rates of disabling acute and chronic postsurgical pain (CPSP). However, little is known about the subacute period when acute to chronic pain transition occurs.AimsExamine feasibility of electronic daily monitoring of pain and opioid use in adolescents during the first 30-days at home following major surgery, and identify target features of subacute pain curves associated with CPSP at 4 months.Methods25 youth (10-18 years) undergoing major musculoskeletal surgery reported daily pain severity, interference, and opioid use on the Brief Pain Inventory, each evening for 30 days after hospital discharge, to form short time series trajectories. At 4 months, youth reported on pain intensity and health-related quality of life. Characteristics of subacute pain severity and interference curves were compared by 4-month CPSP status.ResultsAt 4 months, 20.8% of youth met criteria for CPSP. During the 30-day monitoring period, youth who went on to develop CPSP reported high pain severity on 45.9% of days as compared to 2.9% of days in youth who recovered (P=0.005), and high pain interference on 49.4% of days vs. 9.7% in youth who recovered (P=0.01). Pain variability and rate of change were not significantly associated with CPSP in our pilot sample.ConclusionsWe found it feasible to collect daily pain data in youth recovering at home after major surgery. Pilot findings suggest that daily electronic monitoring may identify early recovery problems at home after surgery. Larger studies are needed to validate subacute pain trajectory features to identify risk for CPSP.

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