---
title: Preemptive Analgesic Effects of Popliteal Sciatic Nerve Block in Patients With Bilateral Hallux Valgus Surgery
nct_id: NCT03414593
overall_status: UNKNOWN
phase: NA
sponsor: Asan Medical Center
study_type: INTERVENTIONAL
primary_condition: Pain, Postoperative
countries: South Korea
canonical_url: "https://parkinsonspathways.com/agent/trials/NCT03414593.md"
clinicaltrials_gov: "https://clinicaltrials.gov/study/NCT03414593"
ct_last_update_post_date: 2018-01-30
last_seen_at: "2026-05-12T06:38:45.785Z"
source: ClinicalTrials.gov (mirrored, no enrichment)
---
# Preemptive Analgesic Effects of Popliteal Sciatic Nerve Block in Patients With Bilateral Hallux Valgus Surgery

**Official Title:** Prospective, Randomized, Single Blind Trial of Preemptive Analgesic Effects of Popliteal Sciatic Nerve Block in Patients With Bilateral Hallux Valgus Surgery

**NCT ID:** [NCT03414593](https://clinicaltrials.gov/study/NCT03414593)

## Key Facts

- **Status:** UNKNOWN
- **Phase:** NA
- **Study Type:** INTERVENTIONAL
- **Target Enrollment:** 20
- **Lead Sponsor:** Asan Medical Center
- **Conditions:** Pain, Postoperative, Preemptive Peripheral Nerve Block, Acute Pain
- **Start Date:** 2018-01-02
- **Completion Date:** 2018-12-31
- **CT.gov Last Update:** 2018-01-30

## Brief Summary

The purpose of this study was to investigate the preemptive effect of ultrasound guided popliteal scistic nerve block on postoperative acute pain in patients with bilateral hallux valgus.

After induction of general anesthesia, the leg to be operated first is decided randomly. After the operation of one leg is completed, PSNB is performed on both legs with 0.2% Ropivacaine and surgery is started on the remaining legs.

When the surgery is over, check to see which foot pain begins first, how strong the pain is, and whether there are any side effects.

## Eligibility

- **Minimum age:** 20 Years
- **Maximum age:** 80 Years
- **Sex:** ALL
- **Healthy Volunteers:** No

```
Inclusion Criteria:

1. adults between the ages of 20 and 80
2. bilateral hallux valgus surgery on the same day
3. ASA class 1 or 2
4. Patients who have voluntarily agreed in writing to participate in the trial

Exclusion Criteria:

1. Patient with side effects on local anesthetics or steroids
2. Patient who are taboo of peripheral nerve block such as blood clotting disorder, infection, etc.
3. Patients with uncontrolled medical or psychiatric problem
4. Patient does not agree to participate in the study
5. Patients who are pregnant or lactating
```

## Arms

- **preoperative blocked leg: group preB** (EXPERIMENTAL) — ultrasound guided popliteal sciatic nerve block with 0.2% ropivacaine 20ml Before surgical incision
- **postoperative blocked leg: group postB** (ACTIVE_COMPARATOR) — ultrasound guided popliteal sciatic nerve block with 0.2% ropivacaine 20ml After surgical incision

## Interventions

- **Ultrasound guided popliteal sciatic nerve block with 0.2% ropivcaine** (DRUG) — Ultrasound guided popliteal sciatic nerve block with 0.2% ropivacaine 20ml

## Primary Outcomes

- **Analgesic duration of nerve block** _(time frame: at 0, 0.5, 1, 4, 8, 12 hours after operation. And AM 9 and PM 5 of POD (Post Operative Day) 1)_ — The difference of NRS during study time between group preB and group postB

The Numeric Rating Scale (NRS-11) is an 11-point scale for patient self-reporting of pain. It is for adults and children 10 years old or older.

0: No pain, 1-3: mild pain, 4-6: Moderate pain, 7-10: severe pain, 10: worst pain imaginable.

## Secondary Outcomes

- **Difference of analgesic consumption between both group** _(time frame: at 0, 0.5, 1, 4, 8, 12 hours after operation. And AM 9 and PM 5 of POD (Post Operative Day) 1)_
- **side effect of popliteal sciatic nerve block** _(time frame: at 0, 0.5, 1, 4, 8, 12 hours after operation. And AM 9 and PM 5 of POD (Post Operative Day) 1)_

## Locations (1)

- Asan Medical Center, Seoul, Songpa-gu, South Korea

## Recent Field Changes (last 30 days)

- `status.lastUpdatePostDate` — added _(2026-05-12)_
- `design.phases` — added _(2026-05-12)_
- `status.overallStatus` — added _(2026-05-12)_
- `status.primaryCompletionDate` — added _(2026-05-12)_
- `status.completionDate` — added _(2026-05-12)_
- `design.enrollmentCount` — added _(2026-05-12)_
- `eligibility.criteria` — added _(2026-05-12)_
- `eligibility.minAge` — added _(2026-05-12)_
- `eligibility.maxAge` — added _(2026-05-12)_
- `eligibility.sex` — added _(2026-05-12)_
- `outcomes.primary` — added _(2026-05-12)_
- `outcomes.secondary` — added _(2026-05-12)_
- `armsInterventions.arms` — added _(2026-05-12)_
- `armsInterventions.interventions` — added _(2026-05-12)_
- `sponsor.lead` — added _(2026-05-12)_
- `results.hasResults` — added _(2026-05-12)_
- `locations.asan medical center|seoul|songpa-gu|south korea` — added _(2026-05-12)_

---

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