Ultrasound Therapy(UST): Indication, Contra-indication, & Dangers

Ultrasound Therapy:Ultrasound therapy is considered as a deep heating modality. It is a form of acoustic propagated in the form of longitudinal compression wave at the frequency of high to be heard by human ear.Soundwave of Ultrasound Therapy from 20Hz to 2000Hz is within the audible range are called the ultrasonic wave.ultrasound therapy

Wavelength of Ultrasound Therapy:  0.15cm

Frequency of Ultrasound Therapy:      1mHz or 3mHz

Intensity of Ultrasound Therapy:

  1. Low intensity- 0.3watt/cm²
  2. Medium intensity- 0.3-1.2watt/cm²
  3. High intensity- 1.2-3watt/cm²

Indication of Ultrasound Therapy

  •  Ultrasound Therapy IndicationAdhesion formation
  • Pain and muscle spasm
  • Haematoma
  • Capsulitis
  • Joint stiffness
  • Scar tissue
  • Calcified tendinitis
  • Swelling


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Contraindication of Ultrasound Therapy

  • Tuberculosis of lungs or bone
  • Tumor
  • Pregnant uterus
  • Deep vein thrombosis
  • Anesthetic area
  • Haemophilia
  • Reproductive organ
  • Acute infection
  • Brain and spinal cord

Physiological effect of Ultrasound Therapy

Ultrasound Therapy

  1. Mechanical effect-
  •  Lossing the tissue by doing micro-massage.
  •   Vasodilation.
  1. Thermal effect-
  • Vasodilation
  • Increase venous drainage
  • Wash out pain creatic substance.
  1. Biological effect-
  •  Blood circulation
  •  Membrane permeability
  •  Muscle relaxation
  •  Normalization of muscle and bone.

Danger of Ultrasound Therapy

  •  Erythema
  •  Burn
  •  Cavitation
  •  Over dosages
  •  Damage of apparatus.