Tissue Changes in Lumbar Multifidus After Dry Needling in Subjects With Nonspecific Low Back Pain.

The dry needling will be performed using disposable stainless steel needles (AGU-PUNT needles of size 0.30x50mm or 0.30x60mm depending on the patient) that will be inserted perpendicularly at the point of major hyperalgesia using the Hong technique. The patient will be in the prone position with a pillow placed in the abdominal region. The area will be cleaned with an antiseptic and allowed to air dry for 3 minutes. After this time, the needle will be inserted at the point indicated by the evaluator before reaching the lumbar multifidus by means of echolocation. Once it is assured that it is in the right place, a total of 10 repetitions are performed. The needle will be removed by depositing it in a needle container and a compression will be removed in the treated area until hemostasis is achieved.

Placebo dry needling will be performed with DongBang DB100 Acupuncture Needles which, upon contact with the patient, retract, hiding in the needle handle. The patient will be in the prone position with a pillow in the abdominal region. The area will be cleaned with an antiseptic and allowed to air dry for 3 minutes. At the point indicated by the evaluator, the placebo needle will be placed initially and the introduction of the needle and its location will be simulated with the ultrasound system. 10 repetitions will be performed. The needle will be removed by depositing it in a needle container and a compression will be made in the treated area.