Effectiveness of Pulsed Electromagnetic Field Therapy on Neuropathic Pain and Disability in Patients With Lumbar Disc Herniation: A Randomized, Double-Blind, Placebo-Controlled Trial
Effectiveness of Pulsed Electromagnetic Field Therapy on Neuropathic Pain and Disability in Patients With Lumbar Disc Herniation: A Randomized, Double-Blind, Placebo-Controlled Trial
This randomized controlled study evaluated whether adding pulsed electromagnetic field (PEMF) therapy to conventional physical therapy provides additional benefits for neuropathic pain and disability in patients with lumbar disc herniation (LDH).
→ This study randomly assigned patients into groups to compare treatments. It examined whether adding pulsed electromagnetic field (PEMF) therapy to standard physical therapy could give extra improvement in nerve-related pain and daily function in people with a slipped disc in the lower back.
Fifty-two patients with ≥3 months of radicular and neuropathic symptoms were enrolled and randomly assigned to a treatment group (PEMF + conventional therapy) or a control group (sham PEMF + conventional therapy).
→ Fifty-two patients who had leg pain and nerve-related symptoms for at least three months joined the study. They were randomly placed into either a treatment group (which received PEMF plus regular therapy) or a control group (which received a fake PEMF treatment plus regular therapy).
Both groups received transcutaneous electrical nerve stimulation, hot packs, and a lumbar exercise program for 15 sessions.
→ Both groups also received the same standard treatments: electrical nerve stimulation, hot packs, and a lower-back exercise program for 15 sessions.
Clinical outcomes-including Visual Analog Scale (VAS), pressure pain threshold, Modified Schober test, DN4, PainDetect, Oswestry Disability Index (ODI), and SF-36-were assessed at baseline, post-treatment, and one month after treatment.
→ Several health measures were checked before treatment, right after treatment, and again one month later. These included pain level (VAS), how sensitive the area was to pressure, lower-back flexibility, nerve-pain questionnaires (DN4 and PainDetect), disability level (ODI), and overall quality of life (SF-36).
Forty-six patients completed the study. → A total of 46 patients finished the study.
Both groups showed significant improvements in VAS scores, neuropathic pain questionnaires (DN4, PainDetect), ODI, and several SF-36 subscales (physical functioning, role-physical, and pain), with additional improvements in emotional role and social functioning observed only in the PEMF group.
→ Both groups improved in many areas: pain levels, nerve-pain scores, disability, and some parts of quality of life (such as physical functioning, daily roles, and pain). Only the PEMF group showed extra improvement in emotional well-being and social activities.
However, none of the between-group comparisons demonstrated significant differences.
No meaningful changes were found in lumbar flexibility or pressure pain thresholds in either group.
→ Neither group showed important changes in lower-back flexibility or in how much pressure they could tolerate on painful areas.
In conclusion, adding PEMF therapy to conventional physical therapy did not provide additional benefit for neuropathic symptoms, radicular pain, disability, lumbar flexibility, pressure pain threshold, or quality of life in patients with LDH-related neuropathic pain.
→ In summary, adding PEMF therapy to regular physical therapy did not give extra benefits for nerve pain, leg pain, disability, back flexibility, sensitivity to pressure, or quality of life in people with nerve-related pain caused by a slipped disc.
Inclusion Criteria:
• Radicular pain and neuropathic symptoms lasting longer than 3 months
Exclusion Criteria:
-• Having undergone an interventional lumbar injection within the last 3 months