Paediatric finger diagnosis: 'Three Passes', Chinese woodcut

Woodcut illustration from an edition of 1726 (4th year of the Yongzheng reign period of the Qing dynasty). It shows the 'Three Passes' (Wind Pass, Qi Pass and Life Pass) of the index finger, used in paediatric finger diagnosis. 'Wind Pass' refers to the veins of the proximal segment, 'Qi Pass' to the veins of the middle segment, and 'Life Pass' to the veins of the distal segment.

PICTURE TITLE: Illustration of the veins in the Tiger's Mouth and Three Passes. OTHER LETTERING: Hukou (tiger's mouth - area between thumb and index finger); feng [guan] (Wind Pass, proximal segment of the index finger); qi [guan] (qi Pass, middle segment of the index finger); ming [guan] (Life Pass, distal segment of the index finger)