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Clinical Trial Summary

To examine for differences in contraction thickness of the transversus abdominis muscle in symptomatic subjects with mechanical lower back pain following the application of dry needling to the lumbar multifidus muscles.


Clinical Trial Description

Consenting subjects will be pre-screened for contraindications for dry needling and whether or not they meet the criteria for low back pain. Following acceptance and prior to intervention sessions, subjects will complete a pre-participation questionnaire. This will be used to check for any needle phobia or previous adverse reactions to needling in prospective subjects and analyze potential confounding variables within the subjects participating. Once consented and accepted into the study, subjects will be taught the deep corset contraction (DCC), which is the isolated co-contraction of bilateral transversus abdominis and the deep fibers of lumbar multifidus. Following DCC training, the subject will have a real-time ultrasound transducer applied to the lateral abdominal wall in order to image the three abdominal muscle layers external oblique, internal oblique and transversus abdominis. A relaxed state measure will be taken from the ultrasound image. Subjects will then perform the DCC and a second measure of the abdominal muscles will be taken. A percentage thickness change will be calculated. Prior to treatment, subjects will have been randomly assigned to one of 2 intervention ordered groups: 1) Dry needling: subjects will be placed prone and dry needling to the bilateral multifidus muscles will be performed. Subjects will sense light pressure and their skin will be penetrated by the needle. 2) Sham needling: subjects will be placed prone and the plastic tubes which house the needles for dry needling will be pressed into the bilateral multifidus muscles.Subjects will sense light pressure, but their skin will not be penetrated. All needling and sham needling interventions will be performed under "clean needle" conditions using appropriate skin preparation and use of clean protective gloves by the PI. The needles used will be single-use disposable acupuncture-style needles which come in a plastic tube for easy insertion. Dry needling techniques are techniques that many practicing therapists use for various musculoskeletal conditions, and are also taught by the PI as part of the requirements for the Doctor of Physical Therapy degree. For this study, all needling and sham needling interventions will be performed by the PI who has over 27 years experience in such interventions. Immediately following the needling or sham needling, the real-time ultrasound will be reapplied to measure thickness of the abdominal muscles in the relaxed state and contracted state using the DCC, and percent changes will be calculated. Measurements will be collected by one of three independent researchers who will be blinded to the intervention. An average of 3 measurements will be used to calculate the percent thickness change after the treatment. In addition, the PI performing the needling will remain blinded to ultrasound measurements. Subjects will then be contacted by phone 48 hours as well as one week after the intervention was given in which they will verbally complete questionnaires regarding their degree of pain and level of disability. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT02284724
Study type Interventional
Source University of Nevada, Las Vegas
Contact
Status Completed
Phase N/A
Start date November 1, 2014
Completion date June 30, 2018

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