Ultrasound Guided Diagnostic Lumbar Medial Branch Blocks
|ClinicalTrials.gov Identifier: NCT00909272|
Recruitment Status : Withdrawn (One of the investigators has left the institution)
First Posted : May 27, 2009
Last Update Posted : April 8, 2015
|Condition or disease||Intervention/treatment|
|Back Pain||Procedure: Lumbar medial branch block Procedure: Ultrasound landmarks|
|Study Type :||Observational|
|Actual Enrollment :||0 participants|
|Official Title:||Ultrasound Guided Diagnostic Lumbar Medial Branch Blocks|
|Study Start Date :||July 2014|
|Estimated Primary Completion Date :||December 2015|
|Estimated Study Completion Date :||December 2015|
US-guided lumbar medial branch block
Patients who have low back pain and/or leg pain due to possible lumbar facet joint disease .
Procedure: Lumbar medial branch block
The ultrasound probe will be placed perpendicular to skin along the midline of lumbar spinous process on longitudinal view first to count the lumbar level. The midpoint of each lumbar level will be marked on the longitudinal view and then will be rotated ninety degrees counter clockwise to axial view to locate the facet joint and the transverse process of lumbar spine. A #22 gauge 10cm long Quincke spinal needle will be inserted to the target area using in plane approach on the axial view. Then the probe will be rotated ninety degrees clockwise to longitudinal view to ensure needle tip is placed on the cephalad aspect of the transverse process. It will then be immediately confirmed by C-arm fluoroscopy on oblique view.
Cadavers for Ultrasound landmarks
Cadavers donated to the Department of Anatomy in McMaster University will be used to determine the landmarks for ultrasound.
Procedure: Ultrasound landmarks
The target point is the superior medial aspect of transverse process of lumbar spine from L3 to S1. A #22 gauge 10cm long Quincke spinal needle will be use for needle placement. Needle placement will be visualized with ultrasound. Practice on cadavers with 3 different operators and see if results are reproducible. Verify with fluoroscopy.
- Perform a diagnostic lumbar medial branch block using ultrasound guidance, decide if it's practical to perform it, whether patients can tolerate it, can it be performed in a timely manner and the # of needle adjustments required to get target points. [ Time Frame: At time of procedure ]
- Does this procedure correlate with other known procedures, by the distance between the needle tip placed under the ultrasound and the superior medial aspect of transverse process of lumbar spine L3 to S1 visualized under C-arm fluoroscopy. [ Time Frame: At time of procedure ]
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00909272
|Hamilton Health Sciences-General Location|
|Hamilton, Ontario, Canada, L8N 3Z5|
|Principal Investigator:||Joseph Park, MD||Hamilton Health Sciences Corporation|