Which scenario indicates intolerance during ramp up of stimulation?

• A. No response at any amplitude.
• B. Pain-free, tolerable sensation at every increment.
• C. Sudden burning or sharp discomfort during ramp up.
• D. Gradual, comfortable increase leading to visible contraction.

Answer: (C)

Intolerance during ramp up is signaled by a sudden burning or sharp discomfort as the stimulation amplitude increases. This abrupt pain means the current is becoming intolerable for the patient, so continuing to raise the dose would worsen the experience or risk tissue irritation. In proper ramping, you’d expect the patient to report a tolerable sensation or a gradual progression to a visible contraction, or at least no pain when the intensity increases. If there’s no response at all, that points to insufficient stimulation delivery or electrode issues, not intolerance. If the sensation stays pain-free and tolerable at each step, that indicates good tolerance. When sudden burning or sharp discomfort appears, the appropriate response is to stop and reassess—check electrode placement, contact quality, and impedance, and adjust to a comfortable level before continuing.