Pulsed Electromagnetic Field Therapy for Fracture Healing

Pulsed Electromagnetic Field (PEMF) therapy is a non-invasive modality increasingly used in orthopaedics to enhance fracture healing. By delivering electromagnetic pulses, PEMF stimulates cellular repair, reduces inflammation, and accelerates bone regeneration. It is especially valuable in cases where normal healing is delayed or impaired.

Mechanism of Action

Cellular Stimulation: PEMF promotes osteoblast activity, enhancing new bone formation.
Gene Expression: Stimulates growth factors such as bone morphogenetic proteins (BMPs).
Angiogenesis: Encourages blood vessel formation to improve nutrient delivery to fracture sites.
Pain Modulation: Reduces pain by influencing nerve activity and inflammatory mediators.

Protocols and Parameters

Frequency: Commonly 15–75 Hz for fracture healing.
Intensity: Low-intensity electromagnetic fields, usually below 5 mT.
Duration: 30 minutes to 8 hours daily depending on device type.
Treatment Course: Several weeks to months, particularly in delayed union or non-union fractures.
Application: External coils or portable devices placed near the fracture site.

Clinical Applications

Delayed Union or Non-Union: Particularly effective where fractures fail to heal naturally.
Stress Fractures: Supports healing in athletes and military personnel.
Post-Surgical Cases: Used after fixation or bone grafting to improve outcomes.
Osteoporotic Patients: Enhances bone density and healing potential.

Evidence and Effectiveness

Multiple clinical studies demonstrate PEMF’s ability to shorten healing time and improve union rates.
Meta-analyses support its effectiveness in non-union fractures, with success rates over 70–80%.
Often recommended when conventional treatments alone are insufficient.

Safety and Contraindications

Safe, with no reported systemic side effects.
Contraindicated in patients with pacemakers, pregnancy, or malignancies at treatment sites.
Compliance with daily use is critical for effectiveness.

Conclusion

PEMF therapy provides a proven, non-invasive adjunct for fracture healing. By stimulating bone repair and improving vascularisation, it is particularly valuable in managing non-union or delayed union fractures. With strong evidence supporting its role, PEMF continues to be a reliable option in modern orthopaedic rehabilitation.

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