Which hydrotherapy modality involves immersion in water with agitation jets?

• A. Whirlpool
• B. Infrared
• C. Diathermy
• D. Ultraviolet

Answer: (A)

The concept being tested is identifying the hydrotherapy method that combines water immersion with mechanical jet agitation. Immersing the body part in circulating water and using jets to create agitation delivers a massaging effect, promotes warmth, improves circulation, and can help relax muscles or reduce stiffness and swelling. This is characteristic of a whirlpool.

Infrared therapy uses radiant heat without water immersion; diathermy heats tissues with electromagnetic energy, not water; ultraviolet therapy uses UV light and involves no immersion in water with jets.