A Study of Contralateral Limb Block

NCT ID: NCT06045936

Last Updated: 2026-01-06

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

PHASE4

Total Enrollment

20 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-06-18

Study Completion Date

2026-12-31

Brief Summary

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This research is being done to determine if an anesthetic like Lidocaine, may be effective when injected around the sciatic nerve of the intact limb in patients with limb loss pain on the contralateral side.

Detailed Description

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Conditions

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Limb Pain, Phantom

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Participants Investigators

Study Groups

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Lidocaine Group

Subjects will receive a lidocaine injection in the back of their residual limb.

Group Type EXPERIMENTAL

Lidocaine

Intervention Type DRUG

2 teaspoons of 2% lidocaine injection

Sham Group

Subjects will receive a placebo injection in the back of their residual limb.

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

Saline injection

Interventions

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Lidocaine

2 teaspoons of 2% lidocaine injection

Intervention Type DRUG

Placebo

Saline injection

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Lower extremity amputation performed more than 12 months before study enrollment
* PLP/RLP in affected amputated limb \> 4 on NRS26
* Pain duration of more than 6 months despite a trial of conservative therapies for at least 2 months, including oral medications, topical medicines, physical therapy, and physical modalities (i.e., heat, cold, transcutaneous electrical nerve stimulation, phonophoresis)
* Willingness to undergo image guided diagnostic nerve block

Exclusion Criteria

* Refusal / inability to participate or provide consent
* Contraindications to diagnostic nerve block
* Non-neurogenic source of PLP/RLP
* Current opioid use \> 50 morphine milligram equivalents per day
* Any interventional pain treatment in the residual limb within the last 30 days
* Severe uncontrolled medical condition (i.e., hypertensive crisis, decompensated hypothyroidism)
* Use of investigational pain drug within past 30 days or other concurrent clinical trial enrollment
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Mayo Clinic

OTHER

Sponsor Role lead

Responsible Party

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Cole W. Cheney

Principal Investigator

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Cole Cheney, MD

Role: PRINCIPAL_INVESTIGATOR

Mayo Clinic

Locations

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Mayo Clinic Health System - Mankato

Mankato, Minnesota, United States

Site Status RECRUITING

Countries

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United States

Facility Contacts

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Cole Cheney, MD

Role: primary

5156816338

Related Links

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Other Identifiers

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22-010792

Identifier Type: -

Identifier Source: org_study_id

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