Pulsed Electromagnetic Field Therapy in Veterinary Rehabilitation

Pulsed Electromagnetic Field (PEMF) Therapy is a non-invasive treatment that uses electric and magnetic fields to stimulate the body’s natural healing processes. Though the concept has existed for over a century, PEMF therapy has gained significant traction in the past 30 years thanks to technological advancements and growing research, including FDA approvals in human medicine.

In veterinary rehabilitation, PEMF therapy is increasingly used in clinical settings and is also available for at-home application. Popular devices include the Assisi Loop, Respond Bio-Pulse Mat, MagnaWave machines, and the BEMER blanket. Both veterinary professionals and pet owners have reported noticeable improvements in pain reduction, inflammation control, and overall healing with regular use. PEMF can be an effective tool in both prehabilitation—to prevent injuries—and rehabilitation—to promote healing after surgery or injury.

Common Uses of PEMF Therapy

• Bone Healing

  An original use of PEMF therapy was to treat non-union fractures. Veterinary studies using controlled experimental models (ie canine tibial osteotomies) have shown that animals treated daily with low-frequency PEMF devices experience faster bone formation, improved bone strength, and earlier ability to bear weight. Results in traumatic fracture can vary, but consistent use over several weeks yields optimal effects.

• Osteoarthritis

  Research has demonstrated that regular application of PEMF therapy can reduce the signs of osteoarthritis. One notable study in dogs demonstrated that 20 sessions of PEMF resulted in sustained clinical improvements that outlasted those of NSAIDs (non-steroidal anti-inflammatory drugs). This is a promising non-pharmaceutical option for managing chronic joint pain in animals.

• Reduction of Pain, Inflammation, and Swelling 

  While inflammation is a necessary part of healing after surgery or injury, excessive or prolonged inflammation can delay recovery. PEMF therapy has been shown—both in human and veterinary studies—to decrease inflammatory mediators and reduce the need for post-operative pain medication.  

• Soft Tissue Healing

  Several studies have noted accelerated healing of both acute and chronic wounds with consistent use of PEMF therapy. Evidence is still emerging in veterinary medicine, but results support PEMF as a valuable adjunct in soft tissue recovery.

How Does PEMF Therapy Work?

Unlike TENS (transcutaneous electrical nerve stimulation) units, which deliver electrical current through electrodes placed on the skin, PEMF units use a coil or antenna to emit electromagnetic fields that penetrate deeper tissues. These pulses can vary in waveform, frequency, and intensity—each of which influences specific therapeutic outcomes.

At the cellular level, PEMF therapy is theorized to promote healing by modulating biological processes:

• Increased Calcium Ion Signaling: PEMF may enhance calcium ion (Ca2+) binding, influencing key cellular functions such as metabolism, inflammation, and apoptosis (regulated cell death).

• Increased Nitric Oxide Production: This can help regulate immune responses, reduce inflammation, and dilate blood vessels to improve blood flow.

• Activation of Heat Shock Proteins (HSPs): HSPs are protective proteins naturally activated during stress. PEMF therapy has been shown to increase their expression, helping stabilize and repair damaged cells.

• Upregulation of Adenosine Receptors: Increased expression of adenosine receptors contributes to anti-inflammatory effects at the tissue level.

These mechanisms are primarily supported by research in human and laboratory animal models, and ongoing veterinary research is helping to validate these effects in companion animals.

When Not to Use PEMF Therapy

PEMF therapy is incredibly safe, but there are some contraindications:

• Active Bleeding: PEMF increases circulation and could worsen active bleeding.

• Pregnancy: Due to limited research, PEMF should not be used in pregnant animals.

• Implanted Battery-Operated Devices: Electromagnetic fields may interfere with pacemakers or similar devices.

• Organ Transplants and Autoimmune Disorders: Because PEMF may stimulate immune activity, caution is advised in animals on immunosuppressive medications.

Always consult with a veterinarian before starting PEMF therapy, especially if your animal has any of these conditions.

Conclusion

PEMF therapy is a safe, non-invasive tool with growing scientific support for its use in veterinary rehabilitation. While research continues to evolve, clinical evidence and real-world use suggest significant benefits for a variety of conditions—from arthritis and injury recovery to wound healing and pain management. Most animals tolerate PEMF therapy very well, often becoming visibly relaxed during sessions.

If you are interested in whether PEMF therapy could benefit your animal, we would be happy to help develop a customized plan that fits their specific needs.