Pulsed Shortwave.

Pulsed Shortwave Treatment & Technology

• Increase the range of movement of joints
• Reduction of pain & inflammation for acute & chronic conditions
• Increase blood flow

Pulsed shortwave uses high frequency electromagnetic waves to produce thermal and non thermal effects in deeps tissues. An advantage of pulsed shortwave over ultrasound is that a much larger area can be treated and the heating affect will last longer, if necessary giving the practitioner more time to work on the treated area.

What is Pulsed Shortwave Treatment & Technology?

Pulsed Shortwave Treatment & Technology (PSWT) is a form of electromagnetic therapy used in physiotherapy to promote tissue repair, reduce pain, and modulate inflammation. It is derived from shortwave diathermy (SWD), a modality that uses high-frequency electromagnetic energy typically at 27.12 MHz (a designated medical frequency)—to deliver energy to biological tissues.

Unlike continuous shortwave diathermy, which produces significant thermal effects, PSWT delivers energy in pulses. This pulsing reduces the average power delivered and therefore minimises tissue heating. As a result, PSWT is primarily considered a non-thermal modality, though mild thermal effects may occur depending on dosage parameters.

Technology & Mechanism of Action

PSWT devices generate oscillating electromagnetic fields via capacitive plates or inductive drum applicators. When applied to the body, these fields induce electrical currents within tissues. The proposed mechanisms include:

• Cell membrane modulation: Influences ion exchange and membrane permeability.
• Enhanced microcirculation: Promotes local blood flow without excessive heat.
• Stimulation of fibroblasts: Encourages collagen synthesis and tissue repair.
• Pain modulation: Possibly through altered nociceptor activity and reduced inflammatory mediators.

Because energy penetrates several centimetres into soft tissue, PSWT is suitable for treating deep structures such as joint capsules, ligaments, and large muscle groups.

Clinical Applications in Physiotherapy

Physiotherapists use PSWT as an adjunct to manual therapy and exercise rehabilitation. Common indications include:

• Osteoarthritis
• Tendinopathies (e.g., rotator cuff, patellar tendon)
• Ligament sprains
• Muscle strains
• Post-operative soft tissue healing
• Chronic inflammatory conditions
• For example, in knee osteoarthritis, PSWT may be used to reduce pain and stiffness before therapeutic exercise. In subacute ligament injuries, it may support collagen remodelling and accelerate recovery timelines.

Treatment sessions typically last 10–20 minutes. The physiotherapist selects pulse duration, pulse frequency, and intensity according to the treatment objective (acute vs chronic pathology)