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.