Facet Joint Syndrome Clinical Trial
Official title:
Effect of the Multifidus Muscle Twitch on the Long Term Effect of Radiofrequency Lumbar Medial Branch Neurotomy
The investigators collected data and chart from the patients who were diagnosed facet joint
syndrome and underwent lumbar RF medial branch neurotomy between January 2009 and June 2014.
RF was performed using sensory stimulation and multifidus twitching to confirm the position
of RF needle. The patients wil be grouped according to the adequacy of RF needle position
while performing RF medial branch neurotomy ('complete' when all needles were placed
adequately, 'partial' when one of the needles for a facet joint medial branch was placed
inadequately, 'none' when there were both needles positioned inadequately for a facet joint)
The relationship between the long term effect of RF neurotomy (longer than 6 months) and the
groups will be analyzed.
Facet joint syndrome has been described as a common cause of lumbar back pain. To achieve
prolonged therapeutic effect in patients with lumbar facet joint syndrome, radiofrequency
(RF) medial branch neurotomy is commonly performed. When performing RF neurotomy, needle
placement in correct position is very important. For this reason, identification of sensory
stimulation and multifidus muscle twitching by using the electrode have been commonly
performed. However, there were no previous reports regarding relationship between prognosis
of RF neurotomy and multifidus muscle twitching in combination of sensory stimulation. The
purpose of this study was to evaluate the prognostic value of multifidus twitching when
sensory stimulation was achieved while performing RF needle neurotomy in patients with
lumbar facet syndrome.
The investigators have collected data and chart from the patients who were diagnosed facet
joint syndrome and underwent lumbar RF medial branch neurotomy between January 2009 and June
2014.
RF was performed using sensory stimulation and multifidus twitching to confirm the position
of RF needle. When numeric pain intensity score decreased less than half of the initial pain
score, the procedure was regarded as effective and the duration was followed and recorded
for each patients.
When multifidus twitching was observed in a voltage less than 1.0 to 2.0 times of the
sensory stimulation (≤ 0.5V), the positioning of the RF needle will be regarded as adequate.
The most appropriate cutoff value will be determined by univariate analysis. The patients
will be grouped according to the adequacy of RF needle position while performing RF medial
branch neurotomy ('complete' when all needles were placed adequately, 'partial' when one of
the needles for a facet joint medial branch was placed inadequately, 'none' when there were
both needles positioned inadequately for a facet joint) The relationship between the long
term effect of RF neurotomy (longer than 6 months) and the groups will be analyzed.
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Observational Model: Case Control, Time Perspective: Retrospective
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