Placebo-controlled Trial of Transdiscal Radiofrequency Annuloplasty

Status Completed

Clinical Trial Summary

Each patient was assigned to one of the two groups: IDB or Sham. On the day of the procedure, an IV was inserted in pre-procedural area and patient transported to the procedure room. The procedure will be completed under fluoroscopy in prone position. Patients were given 1-4 mg of midazolam for relaxation before the procedure and, if needed, 50-100 mcg of fentanyl IV during the procedure. The patients was randomly assigned to treatment or placebo using computer-generated codes maintained in sequentially numbered opaque envelopes. The physician performing procedure was informed of the assignment. In IDB group, guided by the fluoroscopic imaging, two transdiscal probes was positioned in the posterior annulus using a posterolateral, oblique approach. First, two electrically insulated 17G transdiscal introducers was used to gain an access to the disc space. Than, two radiofrequency probes will be positioned through each of the introducers bilaterally to create a bipolar configuration. Placement of the transdiscal probes within the disc annulus will be confirmed using oblique, lateral, and anterior-posterior fluoroscopic images. Sham group had their introducers and electrodes positioned just outside of the disc. This was also be documented using fluoroscopy. Investigator attached the electrodes to inactive heater control device that provide a similar auditory and visual experience for the patient. Patients were therefore remain blinded to actual treatment and physician performing procedure was not involved in patient's follow-up. Patients were awake and communicating with the physician conducting the procedure and if pain in legs were present and increased during the procedure, the heating protocol would be stopped. Following completion of procedure the patient was transferred to recovery and monitored for 45 minutes, then discharged home with instructions. The patients were followed over a period of 12 months.

Clinical Trial Description

Back Pain ;

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00750191
Study type	Interventional
Source	Baylis Medical Company
Contact
Status	Completed
Phase	Phase 1
Start date	September 2007
Completion date	September 2012

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.