Long Pulse / Chang Mai
Updated 2026-08-02
INTRODUCTION
English translation pending.
CORE DEFINITION
The long pulse is one of the classical pulse forms in traditional Chinese medicine. On palpation it runs straight and extended, reaching beyond the normal span of the cun, guan, and chi positions, like a long pole under the fingers. It is classically read as a sign of excess: abundant yang qi, internal heat, or a strong and full pathogenic influence, and it appears most often in patterns of rising liver yang or excess heat. The important qualification is that a long pulse also occurs in healthy, robust young adults, so it is not by itself evidence of disease.
SCAFFOLDING EFFECT
Reduce cognitive load
- Excess signal: Read an over-extended output as a sign of surplus drive or accumulated heat rather than of weakness. - Context gate: Confirm a single finding against other signs before drawing a conclusion from it. - Normal-range check: Ask whether an extreme reading is simply the healthy high end of the distribution.
Anchor fast decisions
Pulse length reflects how far the arterial wave is driven along the vessel. When yang qi and heat are abundant, vessel tension rises and the wave travels further than its normal span, which is why the finding is classed as a sign of excess. The same mechanism produces long pulses in strong healthy people whose circulation is simply vigorous, so the reading only becomes clinically meaningful when it is combined with other signs of heat or excess.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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