EP1.59 Comparison of Single-Shot vs Continuous Catheter with Pump Suprainguinal Fascia Iliaca Block on Postoperative Opioid Consumption and Length of Stay following Combined Periacetabular Osteotomy and Hip Arthroscopy

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ID: 331304
2026
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Abstract
Abstract Background Suprainguinal fascia iliaca (SIFI) blocks provide targeted analgesia for hip surgery and may be administered as single-shot injection or continuous catheter. This study aimed to compare postoperative length of hospital stay (LOS), numeric rating scale (NRS) pain scores, and milligrams of morphine equivalents (MME) in patients undergoing primary single-stage periacetabular osteotomy (PAO) and hip arthroscopy with single-shot versus continuous catheter SIFI blocks. Methods A retrospective review of patients aged 12-50 who underwent primary combined hip arthroscopy and PAO between 2023-2026 was conducted. Patients received either single-shot or continuous catheter SIFI blocks. Exclusion criteria included prior ipsilateral hip surgery, preoperative opioid use exceeding 6 months, and concomitant procedures unrelated to instability or impingement. Collected data included demographics, LOS, daily MME (normalized to body weight), and NRS scores. Pain scores were recorded at postoperative hours 0, 6, 12, and 24, and daily for the duration of hospitalization. Linear mixed-effects models with random intercepts for patients were used to evaluate changes in MME and NRS over time and between groups, including group-by-time interaction effects. The immediate postoperative (hour 0) and postoperative day 0 values were used as baselines for hourly and daily analyses respectively. Results Eighty-eight hips were included (single-shot: n=46; catheter: n=42). Groups were similar in demographics and LOS (p>0.05), the cohort was 83% female, mean age 25.2 ± 9.0 years, BMI 22.0 ± 0.4 kg/m2, and LOS 3.2 ± 1.6 days. NRS scores increased at 6 (p=0.056),12 (p=0.040), and 24 (p=0.024) hour intervals relative to baseline, with no significant changes in pain scores for the remainder of hospitalization (p>0.05). The catheter group demonstrated a non-significant trend towards lower NRS scores on postoperative day 5 (p=0.269). Opioid consumption (mg/kg) increased on postoperative days 1-2, returned to baseline by postoperative day 3, and decreased below baseline on postoperative days 4-5 (p=0.029, p=0.046). No significant differences between groups in NRS or MME trajectories, and no significant group-by-time interactions were observed (p>0.05). Conclusion Single-shot and continuous catheter SIFI blocks provide comparable postoperative pain control, opioid consumption, and LOS. Both techniques appear to be effective analgesic strategies for patients undergoing combined PAO and hip arthroscopy.
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Authors Kelly Mardaus, Lauren Heylumn, Brianna Rowe, Ronald Hugate, Michael B. Ellman, James Genuario
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Journal Journal of hip preservation surgery
Year 2026
DOI
10.1093/jhps/hnag043.243
URL
https://doi.org/10.1093/jhps/hnag043.243
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