“Diffusion of innovations”: a feasibility study on the pericapsular nerve group block in the emergency department for hip fractures

Anirudh Ramachandran, Michelle Montenegro, Maninder Singh, Trevor Dixon, Waqas Kayani, Timothy Liang, Nick Yu, Srinivas Reddy, Anna Liveris, Mallika Manyapu, Alyssia A. McEwan, Vincent T. Nguyen, Nechama V. Sonenthal, Jill Corbo, Benjamin W. Friedman, Jeremy Sperling, Michael P. Jones, Michael Halperin

Research output: Contribution to journalArticlepeer-review


Objective Hip fractures are associated with significant morbidity and mortality. Ultrasound-guided peripheral nerve blocks are a safe method to manage pain and decrease opioid usage. The pericapsular nerve group (PENG) block is a novel, potentially superior block because of its motor-sparing effects. Through training, simulation, and supervision, we aim to determine whether it is feasible to perform the PENG block in the emergency department. Methods Phase 1 consisted of emergency physicians attending a workshop to demonstrate ultrasound proficiency, anatomical understanding, and procedural competency using a low-fidelity model. Phase 2 consisted of a prospective, observational, feasibility study of 10 patients with hip fractures. Pain scores, side effects, and opioid usage data were collected. Results The median pain score at time 0 (time of block) was 9 (interquartile range [IQR], 6.5–9). The median pain score at 30 minutes was 4 (IQR, 2.0–6.8) and 3.5 (IQR, 1.0–4.8) at 4 hours. All 10 patients required narcotics prior to the initiation of the PENG block with a median dosage of 6.25 morphine milligram equivalents (MME; IQR, 4.25–7.38 MME). After the PENG block, only 30% of the patients required further narcotics with a median dosage of 0 MME (IQR, 0–0.6 MME) until operative fixation. Conclusion In this feasibility study, PENG blocks were safely administered by trained emergency physicians under supervision. We demonstrated data suggesting a trend of pain relief and decreased opiate requirements, and further investigation is necessary to measure efficacy.

Original languageEnglish (US)
Pages (from-to)198-206
Number of pages9
JournalClinical and Experimental Emergency Medicine
Issue number3
StatePublished - Sep 1 2022


  • Hip fractures
  • Hospital emergency service
  • Interventional ultrasonography
  • Nerve block
  • Pain management

ASJC Scopus subject areas

  • Emergency Medicine
  • Emergency


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