Long-Wave Diathermy (LWD) Machine
A Long-Wave Diathermy (LWD) machine is a therapeutic device used in physiotherapy to generate deep heat within body tissues. Operating at a frequency of 1 MHz and a wavelength of 300 meters, it acts as a "precision instrument" for targeted, gentle heating, making it especially suitable for small joints and patients with lower heat tolerance.
Key Clinical ApplicationsLWD is primarily used to manage pain and improve mobility in musculoskeletal conditions: drgeetanjaliphysiotherapist.com +1
- Chronic Pain & Stiffness: Effective for low back pain, cervical spondylosis, and frozen shoulder.
- Joint Disorders: Frequently used for osteoarthritis (arthrosis), rheumatoid arthritis, and joint contractures.
- Soft Tissue Injuries: Treats tendinitis, bursitis, muscle spasms, and ligament injuries like ankle sprains.
- Rehabilitation: Useful for post-surgical recovery and scar tissue management. drgeetanjaliphysiotherapist.com +4
Technical Features & Advantages
Feature
Long-Wave Diathermy (LWD)
Frequency
1 MHz (much lower than the 27.12 MHz of Short-Wave)
Penetration
Up to 4 cm (approx. 2 inches) deep into tissues
Portability
Typically lightweight (approx. 2–4 kg) compared to 40+ kg Short-Wave machines
Safety Profile
Higher safety margin with lower power output (around 10–75 Watts)
Interference
Minimal electrical interference with other clinic equipment
How It Is UsedThe machine uses a capacitor field method to generate heat. A physiotherapist applies specialized LWD cream to the treatment area to act as a coupling medium. Two electrodes—one active (held by the therapist or placed on the patient) and one inactive—are used to deliver the current. Treatments typically last 15 to 20 minutes. drgeetanjaliphysiotherapist.com +3Important PrecautionsLWD should not be used in the following circumstances:
- Metal Implants: Although some sources suggest it is safer than short-wave, most guidelines advise avoiding areas with metal pins, dental fillings, or pacemakers due to burn risks.
- Pregnancy: Avoid application over the abdomen or pelvis.
- Specific Conditions: Malignant tumors, active bleeding, acute infections, or areas with impaired skin sensation. www.physiotherapyequipments.com +4
Would you like to see a comparison table between Long-Wave and Short-Wave Diathermy to help decide which is better for a specific injury?This is for informational purposes only. For medical advice or diagnosis, consult a professional. AI responses may include mistakes. Learn more
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