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Evaluation of effect of sedation on diagnostic lumbar facet joint nerve blocks
ISRCTN ISRCTN23482653
ClinicalTrials.gov identifier
Public title Evaluation of effect of sedation on diagnostic lumbar facet joint nerve blocks
Scientific title
Acronym N/A
Serial number at source Protocol #6
Study hypothesis To demonstrate that sedation has no effect on the validity of diagnostic lumbar facet joint nerve blocks.
Lay summary
Ethics approval Not provided at time of registration
Study design Randomised controlled trial
Countries of recruitment United States of America
Disease/condition/study domain Chronic low back pain
Participants - inclusion criteria 1. Subjects were between 18 and 90 years of age
2. Subjects with a history of chronic, function limiting, low back pain of at least 6 months duration
3. Subjects able to give voluntary, written informed consent to participate in the investigation
4. Subjects who, in the opinion of the investigator, are able to understand the investigation and/or cooperate with the investigational procedures
5. Patients who have undergone diagnostic facet joint blocks and the diagnosis of lumbar facet joint pain has been previously confirmed
Participants - exclusion criteria 1. Patients without lumbar facet joint pain
2. Patients with uncontrolled major depression or uncontrolled psychiatric disorders
3. Pregnant or lactating women
4. Patients with multiple complaints involving multiple other problems which have overlapping pain complaints
5. Patients unable to achieve proper positioning or unable to understand informed consent and protocol
6. Patients with a history of adverse reaction to either midazolam or fentanyl
Anticipated start date 02/02/2004
Anticipated end date 30/06/2004
Status of trial Completed
Patient information material
Target number of participants 180 subjects, randomized into 3 groups with equal distribution
Interventions Intravenous injection of sodium chloride solution, midazolam, or fentanyl prior to lumbar facet joint nerve blocks under fluoroscopy.
Primary outcome measure(s) For a small proportion of patients with chronic low back pain, the administration of sedation with midazolam or fentanyl can be a confounding factor in the diagnosis of lumbar facet joint pain. The study shows that an intravenous preoperative sedative dose of a narcotic such as fentanyl or an anxiolytic such as midazolam is no more likely to cause a small proportion of patients to report false positive pain relief with active motion testing than sodium chloride placebo.
Secondary outcome measure(s) The study suggests that prudent administration of midazolam or fentanyl to patients who are not relaxed may not have any significant adverse effect on the diagnostic validity of controlled comparative local anesthetic blocks.
Sources of funding Ambulatory Surgery Center and Pain Management Center of Paducah (USA)
Trial website
Publications 2004 results in http://www.ncbi.nlm.nih.gov/pubmed/16858466
Contact name Dr  Laxmaiah  Manchikanti
  Address 2831 Lone Oak Road
  City/town Paducah, KY
  Zip/Postcode 42003
  Country United States of America
  Tel +1 270 554 8373
  Fax +1 270 554 8987
  Email drm@asipp.org
Sponsor Ambulatory Surgery Center and Pain Management Center of Paducah (USA)
  Address 2831 Lone Oak Road
  City/town Paducah, KY
  Zip/Postcode 42003
  Country United States of America
  Tel +1 270 554 8373
  Fax +1 270 554 8987
  Email drm@asipp.org
  Sponsor website: http://www.thepainmd.com
Date applied 27/09/2005
Last edited 13/10/2008
Date ISRCTN assigned 17/11/2005
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