- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT01515540
Brain Imaging of Lidoderm for Chronic Back Pain
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
Previous data showed that Lidoderm patches that contain 5% Lidocaine applied to the affected area for a period of 1-2 weeks decreased chronic pain. We conducted a preliminary open-label trial in chronic back pain patients and found that the patients reported reduction in pain intensity and associated brain activity (measured with fMRI). As a next step, we conducted a double blind clinical trial where the drug was tested against placebo to determine whether the effects on CBP were mediated by a pharmacological mechanism. For this we obtained psychophysical measurements of pain and measures of brain activity using fMRI. Two scans after treatment (6 hour and 2 weeks after treatment) were conducted to observe the effects of short term and long term use.
Brain activity was measured by the non-invasive method of functional imaging (fMRI), which enables examination of cortical blood flow during pain rating. These brain scans were acquired in chronic back pain patients while they rated their ongoing chronic pain using a finger span device. In a control task, each patient also rated the changes in the length of a bar n a screen (a visual control task). Anatomical scans were also acquired.
The general design of the study was that CBP subjects were assesses with fmri for brain responses for ongoing pain at three time points. The initial (baseline) scan occurred after a minimum of 48 hour period during which the patients refrained from taking analgesic medication. The patients were next scanned at 6 hours after treatment and again after 2 weeks of continuous treatment. Subjects were randomised to placebo or Lidoderm (both Lidoderm and placebo patches were supplied by Endo Pharmaceuticals).
Undersøgelsestype
Tilmelding (Faktiske)
Fase
- Fase 4
Kontakter og lokationer
Studiesteder
-
-
Illinois
-
Chicago, Illinois, Forenede Stater, 60611
- Northwestern University
-
-
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Male or Female 18 years or older of age
- Pain in the location of the lower back
- Pain duration for a minimum of 6 months on a continuous basis
- Pain intensity of at least 3 out of 10 on most days of the week over the past six months
- Manifestations of radicular element of pain: radiation below knee (examples towards thigh, buttocks).
- Right handedness
Exclusion Criteria:
- Applying for or currently receiving workers' compensation or disability status.
- Back pain secondary to spinal cord injury
- Back pain secondary to any systemic condition (e.g ankylosing spondylitis0
- Diabetes mellitus
- Back pain secondary to tumors.
- Standard MRI criteria re: claustrophobia, metal objects etc.
- Subjects with cognitive deficits such as dementia, psychiatric illness including depression with a BDI score of more than 19 (moderate to severe depression), history of brain injury, history of chronic disease
- Pregnant and/or lactating women
- Left handedness
- Active cancer
- Other serious painful condition (e.g., arthritis)
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Grundvidenskab
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Tredobbelt
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
---|---|
Aktiv komparator: lidocaine
5% lidoderm patch
|
5% lidoderm patch
Andre navne:
|
Placebo komparator: control
placebo patch
|
placebo
Andre navne:
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
---|---|---|
Pain Intensity on a Visual Analog Scale (VAS) The Scale Had Values From 0-100, Where 0 Represents "no Pain" and 100 Was the "Worst Pain Imaginable".
Tidsramme: 2 weeks
|
the primary hypothesis was that the lidoderm 5% patch was expected to decrease pain intensity post treatment greater than placebo patch. A lower value on the 0-100 scale is considered to represent less pain. Higher values represent more pain. Greater than 20%-30% decrease in pain is considered clinically meaningful. |
2 weeks
|
Samarbejdspartnere og efterforskere
Sponsor
Samarbejdspartnere
Efterforskere
- Ledende efterforsker: Apkar V. Apkarian, PhD, Northwestern University
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Skøn)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
- Smerte
- Neurologiske manifestationer
- Rygsmerte
- Lændesmerter
- Lægemidlers fysiologiske virkninger
- Molekylære mekanismer for farmakologisk virkning
- Anti-arytmimidler
- Depressive midler til centralnervesystemet
- Agenter fra det perifere nervesystem
- Sensoriske systemagenter
- Bedøvelsesmidler
- Membrantransportmodulatorer
- Bedøvelsesmidler, lokale
- Spændingsstyret natriumkanalblokkere
- Natriumkanalblokkere
- Lidokain
Andre undersøgelses-id-numre
- STU00022968
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .
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