Deep Heating Agents, microwave, shortwave,, ultrasound.

Deep Heating Agents
These agents include microwave, shortwave, ultrasound etc and they act through the electromagnetic or mechanical waves. They heat the structure 30-50mm beneath the skin surface. 
Microwave:
  • It is known to selectively heat muscles
  • It is indicated in muscle shortening following fractures. 
  • It is contraindicated if there is an implanted metal or if the patient has a cardiac pacemaker. 
Shortwave:-
  • These waves though called short, have a greater wave length than the microwaves. 
  • It heats the subcutaneous tissue more effectively than the superficial heat modalities. 
  • It is indicated in post fracture contractures and subcutaneous adhesions. 
  • It is contraindicated if there is an implanted metal or if the patient has a cardiac pacemaker.
Ultrasound:-
  • Ultrasound waves are mechanical unlike short wave and microwave. 
  • Ultrasonic wave are not faster than sound but have a great frequency. 
  • It heats the bone muscle junction effectively. 
  • It is indicated in post- fracture muscle shortening and joint capsule contraction. 
  • Fractures fixed with implant are not suitable for ultrasound therapy. 

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