Noxious TENS commonly uses what per-point tx time?

• A. Amplitude: highest tolerated stimulus
• B. Pulse freq: high or low
• C. Pulse duration: long (250 usec up to 1sec)
• D. Tx time: 30-60 sec for each point

Answer: (D)

Noxious TENS relies on a brief, intense noxious input at each point to trigger the body's pain-inhibiting systems. The typical per-point treatment time is 30–60 seconds because this duration is enough to activate endogenous analgesic mechanisms (like descending inhibition and endorphin release) without causing excessive discomfort or skin irritation. Extending the time beyond this window doesn’t reliably increase pain relief and can increase adverse effects, while the other adjustable factors (how strong the stimulus is and the pulse characteristics) are set to produce that noxious input, not to determine the duration per point. So, 30–60 seconds per point is the standard approach.