{
  "abstract": "Background and Aims The interscalene block (ISB) is the gold standard for shoulder surgery but may be limited by respiratory complications and technical difficulty in obese patients. The pericapsular nerve group block for the shoulder (PENG-S) is a newer alternative, targeting articular branches while minimizing motor and diaphragmatic involvement. This study compares ultrasound feasibility and postoperative analgesia of ISB vs. PENG-S in patients with BMI >25.Methods Design Retrospective study Population: 30 patients scheduled for shoulder surgery (arthroscopy or arthroplasty), all with BMI >25 Groups: 15 patients received ISB; 15 received PENG-S Primary outcome: Ultrasound image quality (score 0–5; 0 = optimal visibility, 5 = non-identifiable anatomy) Secondary outcome: Postoperative pain via Visual Analog Scale (VAS) in PACU, at 6 h, 12 h, and 24 hResults Ultrasound Image Quality Mean image difficulty: ISB = 2.47 ± 1.35 | PENG-S = 0.60 ± 0.63 Statistical significance: p = 0.00026 (Mann-Whitney U test) Postoperative Analgesia (VAS scores) Rescue opioids: 2 patient (PENG-S), 0 patients (ISB)Conclusions In patients with BMI >25, the PENG shoulder block provides superior ultrasound visualization and easier anatomical identification than the interscalene block, with acceptable analgesia in the first 24 h. Although ISB shows slightly better pain scores, the PENG-S block remains a safer and technically simpler alternative, especially in patients with respiratory risk or complex anatomy.",
  "authors": [
    {
      "affiliations": [
        "Anesthesiology and Pain Unit, Hospital Virgen de Los Lirios, Alicante, Spain"
      ],
      "name": "Juan Jose Tortajada-Soler"
    },
    {
      "affiliations": [
        "Anesthesiology and Pain Unit, IMED, Elche, Spain",
        "MedCritic, Alicante, Spain"
      ],
      "name": "Pablo Cuesta-Montero"
    },
    {
      "affiliations": [
        "Anesthesiology and Pain Unit, IMED, Elche, Spain"
      ],
      "name": "Jose Antonio Lopez-Gil"
    },
    {
      "affiliations": [
        "Anesthesiology and Pain Unit, Complejo Hospitalario Universitario Albacete, Albacete, Spain"
      ],
      "name": "Jose Angel Rodenas-Rubio"
    }
  ],
  "title": "EP167 Efficacy and ultrasound feasibility of pericapsular shoulder block vs. interscalene block in obese patients: a prospective comparative study",
  "uid": "00bd0f5a-9132-542f-a5d9-7dab313a48b9"
}