What is the maximum temperature allowed at any one time for a cold whirlpool?

• A. 40 degrees
• B. 50 degrees
• C. 60 degrees
• D. 70 degrees

Answer: (B)

Cold therapy works by exposing tissue to low water temperatures to cause vasoconstriction, reduce nerve conduction, and limit swelling. The standard maximum temperature for a cold whirlpool, to keep it in the cold-therapy range, is 50°F. Staying at 50°F or cooler ensures you maintain the intended vasoconstrictive and analgesic effects; warmer water would lessen the cold effect and its benefits. Water at 60–70°F would be too warm to serve as cold therapy, while 40°F is extremely cold and may be unnecessarily harsh for typical treatment durations. So, the maximum allowed temperature at any one time is 50 degrees.