Inflation and deflation ratio for edema management with intermittent compression is best described as?

• A. 3:1; 45-90 seconds on/15-30 seconds off
• B. 1:1; 15-30 seconds on/45-60 seconds off
• C. 2:1; 30-60 seconds on/30-60 seconds off
• D. 4:1; 60-120 seconds on/10-20 seconds off

Answer: (A)

When using intermittent pneumatic compression for edema, the goal is to create a pumping effect: a longer inflation period to push fluid proximally, followed by a shorter deflation period to allow perfusion and reperfusion. The best pattern describes a three-to-one ratio of inflation to deflation, with the inflation phase lasting tens of seconds and the deflation phase lasting a shorter span (a few tens of seconds). This setup promotes venous and lymphatic return by maintaining enough pressure during inflation to exceed venous hydrostatic pressure, while the brief deflation allows arterial inflow and reduces risk of tissue ischemia and discomfort.

Patterns with equal on/off times don’t generate a net pumping effect, and patterns with longer or shorter cycles can be less effective or more uncomfortable, potentially compromising safety.