{Reference Type}: Clinical Trial, Phase III
{Title}: A phase 3 active-controlled trial of liposomal bupivacaine via sciatic nerve block in the popliteal fossa after bunionectomy.
{Author}: Schwartz G;Gadsden JC;Gonzales J;Hutchins J;Song J;Brady O;DiGiorgi M;Winston R;
{Journal}: J Clin Anesth
{Volume}: 94
{Issue}: 0
{Year}: 2024 06 9
{Factor}: 9.375
{DOI}: 10.1016/j.jclinane.2024.111402
{Abstract}: To investigate the efficacy, safety, pharmacodynamics, and pharmacokinetics of liposomal bupivacaine (LB) administered via ultrasound-guided sciatic nerve block in the popliteal fossa in participants undergoing bunionectomy.<BR>Two-part, randomized, double-blind, active-controlled trial (NCT05157841).<BR>Operating room, postanesthesia care unit, and health care facility (6 sites).<BR>Adults with American Society of Anesthesiologists physical status classification ≤3 and body mass index ≥18 to <40 kg/m2 undergoing elective distal metaphyseal osteotomy.<BR>Part A participants were randomized 1:1:1 to LB 266 mg, LB 133 mg, or bupivacaine hydrochloride 50 mg (BUPI). Part B participants were randomized 1:1 to LB (at the dose established by part A) or BUPI.<BR>The primary endpoint was area under the curve (AUC) of numerical rating scale (NRS) pain intensity scores 0-96 h after surgery. Secondary endpoints included total postsurgical opioid consumption, opioid-free status 0-96 h after surgery, and pharmacokinetic endpoints.<BR>Part A enrolled 22 participants per group. In part B, additional participants were randomized to LB 133 mg (n = 59) and BUPI (n = 60) (185 total). LB 133 mg had significant reductions versus BUPI in the AUC of NRS pain intensity score (least squares mean [LSM], 207.4 vs 371.4; P < 0.00001) and total opioid consumption 0-96 h after surgery (LSM, 17.7 [95% confidence interval (CI), 13.7, 22.8] morphine milligram equivalents [MMEs] vs 45.3 [95% CI, 35.1, 58.5] MMEs; P < 0.00001) and an increased proportion of opioid-free participants (24.4% vs 6%; odds ratio, 5.04 [95% CI, 2.01, 12.62]; P = 0.0003) in parts A + B. Adverse events were similar across groups.<BR>LB 133 mg administered via sciatic nerve block in the popliteal fossa after bunionectomy demonstrated superior and long-lasting postsurgical pain control versus BUPI. The clinical relevance of these findings is supported by concurrent reductions in pain and opioid consumption over 4 days after surgery and a significantly greater percentage of participants remaining opioid-free.