# Ultrasound Guided Emergency Physician Performed Erector Spinae Nerve Block for Rib Fracture Analgesia

> **NCT04168710** · PHASE1,PHASE2 · WITHDRAWN · sponsor: **Yale University**

## Conditions studied

- Rib Fractures

## Interventions

- **DRUG:** ESP block with bupivacaine
- **OTHER:** Saline control/sham injection

## Key facts

- **NCT ID:** NCT04168710
- **Lead sponsor:** Yale University
- **Sponsor class:** OTHER
- **Phase:** PHASE1,PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2025-05-01
- **Primary completion:** 2027-05
- **Final completion:** 2027-05
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** lack of enrollment
- **Last updated:** 2025-07-01


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04168710

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04168710, "Ultrasound Guided Emergency Physician Performed Erector Spinae Nerve Block for Rib Fracture Analgesia". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT04168710. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*