Assessment of the Effect of Botulinum Toxin in Extensor Digitorum Brevis Via Strain Gauge and Nerve Conduction Studies

This study is ongoing, but not recruiting participants.
Sponsor:
Collaborator:
Allergan
Information provided by (Responsible Party):
Gordon Peterson, Loma Linda University
ClinicalTrials.gov Identifier:
NCT00822523
First received: January 12, 2009
Last updated: August 18, 2014
Last verified: August 2014
  Purpose

The purpose of this study is to determine if temporary weakness of a small foot muscle caused by local injection of botulinum toxin into that muscle can be measured with a strain gauge in addition to the previously known valid measurements via nerve conduction studies and surface electromyogram.


Condition Intervention Phase
Normal, Healthy Volunteers
Drug: Botulinum Toxin, Type A
Drug: Saline
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Diagnostic
Official Title: Strain Gauge Feasibility Assessment & Correlation With Compound Muscle Action Potential & Surface Electromyogram Parameters Before & After a Single Intramuscular Injection of Botulinum Toxin Type A Into Extensor Digitorum Brevis Muscle

Resource links provided by NLM:


Further study details as provided by Loma Linda University:

Primary Outcome Measures:
  • Change in measured strength (using strain gauges) of dorsiflexion of digits 3 and 4 ("strength of EDB") after vs. before botulinum toxin injection into EDB [ Time Frame: Baseline (3 times) then following single injection of botulinum toxin into EDB with testing at Day 1, Day 2, Day 4, Day 7, Day 14, Day 21, and Month 4 ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Change in CMAP (with standard reference electrode location and with an "inactive" reference electrode location) from EDB after vs. before botulinum toxin injection into EDB; [ Time Frame: Baseline (once) then following single injection of botulinum toxin into EDB with testing at Day 4; Day 14 and/or Day 21; and Month 4 ] [ Designated as safety issue: No ]
  • Change in Surface Electromyogram(SEMG) parameters from EDB, tibialis anterior (TA), and extensor digitorum longus (EDL) after vs. before botulinum toxin injection into EDB [ Time Frame: Baseline (once) then following single injection of botulinum toxin into EDB with testing at Day 4; Day 14 and/or Day 21; and Month 4 ] [ Designated as safety issue: No ]
  • Evaluation for serious adverse effects of botulinum toxin [ Time Frame: At each visit following injection of botulinum toxin into EDB (Day 0; Day 1; Day 2; Day 4; Day 7; Day 14; Day 21; Month 4) ] [ Designated as safety issue: Yes ]

Estimated Enrollment: 15
Study Start Date: January 2009
Estimated Study Completion Date: June 2015
Primary Completion Date: March 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Botulinum toxin type A, 20 units
Single intramuscular (into extensor digitorum brevis muscle of the foot) dose of Botulinum toxin type A, 20 units
Drug: Botulinum Toxin, Type A
20 units, single dose, intramuscular in right EDB muscle
Other Name: BOTOX
Experimental: Botulinum toxin, type A, 2 units
Single intramuscular (into extensor digitorum brevis muscle of the foot) dose of Botulinum toxin type A, 2 units
Drug: Botulinum Toxin, Type A
2 units, single dose, intramuscular to right EDB muscle
Other Name: BOTOX
Placebo Comparator: Placebo
Saline, Single dose, Intramuscular injection into right EDB
Drug: Saline
Single Dose, Intramuscular into right EDB muscle
Other Name: Placebo

Detailed Description:

Purpose/Hypothesis:

Verify the validity and reliability of strain gauge assessment of strength of extensor digitorum brevis (EDB) muscle compared to compound muscle action potential (CMAP) size from EDB and surface electromyography (SEMG) data from EDB after injection of botulinum toxin into EDB

  1. Primary Outcome Measure:

    Change in measured strength (using strain gauges) of dorsiflexion of digits 3 and 4 ("strength of EDB") after vs. before botulinum toxin injection into EDB

  2. Secondary Outcome Measures:

    1. Change in CMAP (with standard reference electrode location and with an "inactive" reference electrode location) from EDB after vs. before botulinum toxin injection into EDB;
    2. Change in SEMG parameters from EDB, tibialis anterior (TA), and extensor digitorum longus (EDL) after vs. before botulinum toxin injection into EDB

STUDY DESIGN:

  1. Overview:

    Single intramuscular injection of botulinum toxin or placebo (placebo or BOTOX 2 units or BOTOX 20 units, each with a total volume of 0.1 ml) intramuscular into right EDB on Day 0. Strain gauge data and SEMG data from TA and EDL are obtained at each evaluation time: Baseline (3 separate times prior to Day 0 after at least 5 separate training sessions for the strain gauges); Day 1; Day 2; Day 4 (during anticipated rapid change); Day 14 (+/-1 day) (at clinical nadir); Day 21 (+/-1 day) (another day at clinical nadir); and Month 4 (when clinical recovery from the effect of BOTOX should have occurred); CMAP & SEMG data from EDB are obtained at Baseline; Day 4 (close to nadir of CAMP); Day 14 (at nadir of CAMP) and/or Day 21 (at nadir of CAMP); and Month 4 (when clinical recovery from the effect of BOTOX should have occurred but CMAP should not have recovered).

  2. Protocol:

Single-center, Double-Blind, Randomized, Pilot Trial Total Sample Size: 12-15

Treatment Groups:

BOTOX Single Dose 20 units IM in EDB in 0.1 ml BOTOX Single Dose 2 units IM in EDB in 0.1 ml Placebo (Saline) Single Dose IM in EDB in 0.1 ml

Estimated Time to Enroll:

0-3 months

Estimated Study Duration:

4-6 months

  Eligibility

Ages Eligible for Study:   18 Years to 54 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Normal, healthy, male or female subjects, 18 to 54 years of age.
  • Written informed consent has been obtained.
  • Females with child-bearing potential have a negative urine pregnancy test and agree to use a reliable form of contraception during the study.
  • Ability to follow study instructions and likely to complete all required visits.
  • Written authorization for Use and Release of Health and Research Study Information has been obtained.

Exclusion Criteria:

  • Abnormality by focused history and examination including the presence of foot deformity.
  • Abnormal (as determined by the investigator) screening nerve conduction studies of the lower limbs.
  • Identification of anomalous innervation of right EDB via screening nerve conduction studies.
  • The subject having a foot which does not adequately fit in the modified ankle-foot orthosis used with the strain gauge.
  • The subject having a foot in which anatomic bone landmarks cannot be adequately identified.
  • Body mass index (BMI) greater than 30.
  • History of significant (as determined by the investigator) lower limb injury or lower limb surgery
  • Any uncontrolled clinically significant medical condition.
  • Known allergy or sensitivity to any of the components in the study medication.
  • Females with a positive pregnancy test, or who are breast-feeding, planning a pregnancy during the study, who think that they may be pregnant at the start of the study, or females of childbearing potential who are unable or unwilling to use a reliable form of contraception during the study.
  • Concurrent participation in another investigational drug or device study or participation within 3 months prior to study.
  • Treatment with botulinum toxin of any serotype prior to enrollment in study or prior clinical botulism.
  • Any medical condition that may put the subject at increased risk with exposure to BOTOX including diagnosed myasthenia gravis, Lambert-Eaton myasthenic syndrome, amyotrophic lateral sclerosis, or any other disorder that might interfere with neuromuscular function.
  • Evidence of alcohol abuse, drug abuse, or other relevant neuropsychiatric condition.
  • Infection or skin disorder at an anticipated injection site.
  • Any condition or situation that, in the investigator's opinion, may put the subject at significant risk, confound the study results (e.g. variable strength on serial testing during screening examination; or foot, toe, or ankle pain that may limit full participation in muscle strength testing), or interfere significantly with the subject's participation in the study.
  Contacts and Locations
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Please refer to this study by its ClinicalTrials.gov identifier: NCT00822523

Locations
United States, California
Electromyography Laboratory, Loma Linda University Medical Center
Loma Linda, California, United States, 92354
Loma Linda University
Loma Linda, California, United States, 92354
Sponsors and Collaborators
Loma Linda University
Allergan
Investigators
Principal Investigator: Gordon W Peterson, MD Loma Linda University
  More Information

Publications:
Responsible Party: Gordon Peterson, MD, Loma Linda University
ClinicalTrials.gov Identifier: NCT00822523     History of Changes
Other Study ID Numbers: 58360
Study First Received: January 12, 2009
Last Updated: August 18, 2014
Health Authority: United States: Institutional Review Board

Additional relevant MeSH terms:
Botulinum Toxins
Botulinum Toxins, Type A
Anti-Dyskinesia Agents
Central Nervous System Agents
Neuromuscular Agents
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Therapeutic Uses

ClinicalTrials.gov processed this record on October 23, 2014