# ER-One: A Double-blind Trial of Erector Spinae Block (ESP) Versus Paravertebral Block (PVB) Before Breast Cancer Surgery

> **NCT04827030** · PHASE4 · COMPLETED · sponsor: **Institut Curie** · enrollment: 292 (actual)

## Conditions studied

- Breast Surgery

## Interventions

- **DRUG:** Ropivacaïne Hydrochloride by Erector Spinae block
- **DRUG:** Ropivacaïne Hydrochloride by Paravertebral block

## Key facts

- **NCT ID:** NCT04827030
- **Lead sponsor:** Institut Curie
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-06-28
- **Primary completion:** 2023-06-14
- **Final completion:** 2023-07-14
- **Target enrollment:** 292 (ACTUAL)
- **Last updated:** 2025-09-19

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04827030

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04827030, "ER-One: A Double-blind Trial of Erector Spinae Block (ESP) Versus Paravertebral Block (PVB) Before Breast Cancer Surgery". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04827030. Licensed CC0.

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