Frequency Parameter Used to Apply Ultrasound-guided Neuromodulation Percutaneous

Study Overview
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Brief Summary
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In the daily clinical practice, one of the most frequent reasons for consultation physiotherapists is low back pain (LBP). Regardless of the origin of the problem, the approach from physiotherapy contemplates the reduction of pain through different procedures, including neuromodulation. In the field of Physiotherapy, ultrasound-guided Percutaneous Neuromodulation (PNM) is defined as the application through a needle with ultrasound guidance of an electrical current at low or medium frequency, seeking a sensitive and / or motor response of a peripheral nerve in some point of its trajectory, or of a muscle in a motor point, with a therapeutic objective. The objective of the study is to analyze that the effect of PNM on the sciatic nerve produces statistically significant changes in pain, joint range and functionality in patients with chronic LBP. Forty subjects will be recruited, which will be divided into 2 groups: group 1 to which PNM will be applied to the sciatic nerve at 250 microseconds, 3 Hz) during 90 seconds; group 2 to which PNM will be applied to the sciatic nerve in at 250 microseconds, 10 Hz during 90 second. The PNM intervention with NMP will consist in the single application of an asymmetric rectangular biphasic current.

Official Title
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How we Apply Ultrasound-guided Neuromodulation in Lower Back Pain Sufferers

Conditions
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Low Back Pain

Intervention / Treatment
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* Other: NMP


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Diagnosis of Lower Back Pain Having no other therapy Exclusion Criteria: Other pathology (discal hernia, injured limbs, neurological pathology) Belenophobia

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: NMP 3 Hz<br>Participants received the percutaneous electrical stimulation intervention. Specifically, this consisted of the application of a square wave biphasic electrical current, with 3 Hz frequency and a 250µs pulse width, at the maximal tolerable intensity, to cause an tolerable muscle contraction. The application was 10 stimulations of 10 seconds, with 10 seconds at rest between stimulations. A trained physiotherapist performed the PNM intervention. | Other: NMP<br>* Participants received the percutaneous electrical stimulation intervention. Specifically, this consisted of the application of a square wave biphasic electrical current, to cause a tolerable muscle contraction. The application was 10 stimulations of 10 seconds, with 10 seconds at rest between stimulations. A trained physiotherapist performed the PNM intervention.<br>|
| Experimental: NMP 10 Hz<br>Participants received the percutaneous electrical stimulation intervention. Specifically, this consisted of the application of a square wave biphasic electrical current, with 10 Hz frequency and a 250µs pulse width, at the maximal tolerable intensity, to cause an tolerable muscle contraction. The application was 10 stimulations of 10 seconds, with 10 seconds at rest between stimulations. A trained physiotherapist performed the PNM intervention. | Other: NMP<br>* Participants received the percutaneous electrical stimulation intervention. Specifically, this consisted of the application of a square wave biphasic electrical current, to cause a tolerable muscle contraction. The application was 10 stimulations of 10 seconds, with 10 seconds at rest between stimulations. A trained physiotherapist performed the PNM intervention.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Level of pain | Measured by Visual Analogue Scale (0, no pain; 100, max pain) | From baseline measurement up to 1 week | 
| Owestry questionnaire | Lower back pain questionnaire. The final result is classified as minimal disability (0-20), moderate disability (21-40), severe disability (41-60), crippled (61-80) and bed-bound or exaggerating their symptoms (81-100). | From baseline measurement up to 1 week | 
| Range of motion | Measured by goniometer. Hip flexion, external and internal rotation range of motion | From baseline measurement up to 1 week | 
| Y Balance Test | Stability body | From baseline measurement up to 1 week | 
| Strength | Measured by dynamometer. Hip flexion, abduction, external and internal rotation muscle strength | From baseline measurement up to 1 week |