Continuous diathermy mode is primarily associated with which effect and stage?

• A. Heat in subacute
• B. Nonthermal in acute
• C. Heat in acute
• D. Nonthermal in subacute

Answer: (A)

Continuous diathermy delivers a steady amount of energy, producing a thermal effect that heats the deeper tissues. This heating increases tissue temperature, which promotes vasodilation, higher metabolic activity, and greater collagen extensibility—all of which can help healing and improve range of motion.

In the subacute phase of injury, inflammation is winding down and tissues are remodeling. Applying heat at this stage helps to continue the healing process by improving blood flow and tissue pliability, reducing stiffness, and relaxing surrounding muscles. In the acute phase, heating is generally avoided because it can amplify inflammation and edema, so nonthermal approaches are preferred there.

So, the emphasis on continuous diathermy is its thermal effect, and the subacute stage is when that heat-based approach is most beneficial.