31
Participants
Start Date
September 30, 2015
Primary Completion Date
July 31, 2018
Study Completion Date
July 31, 2018
Radiofrequency ablation
RF ablation will be performed using 2 Nimbus multitined electrodes in a bipolar configuration. The electrodes will be placed along the lateral crest using a leap-frogging technique from the inferomedial aspect of the PSIS to the third transverse sacral tubercle at 1.5-2 cm intervals at the skin surface. A radiofrequency current will be passed for 120 seconds per site resulting in thermal coagulation of the plexus. Prior to performing the thermal lesion, electrical stimulation at 2 Hz and 2.0 V will be administered.
Sensory block
Participants will undergo a lidocaine block of the PSN at the lateral crest under ultrasound guidance. 0.5 mL of 2% lidocaine will be injected from the inferomedial border of the PSIS to the third transverse sacral tubercle at approximately 1.5 cm intervals along the skin surface.
Lidocaine
St. Joseph's Pain Clinic, London
University of Toronto
OTHER
University of Alberta
OTHER
Western University, Canada
OTHER