★ MajorEncontro do BaçoFígadoe canal do RimCautionMembro Inferior
Depth
01–2 cun3.0
Oblique insertion
Precautions
CONTRAINDICATED IN PREGNANCY (strongly induces labor). Caution: contraindicated in pregnancy (especially in the early and late stages of gestation).
📍 Location (classical)
On the medial aspect of the leg, 3 cun above the most prominent point of the medial malleolus, in a depression near the posterior border of the medial crest of the tibia.
🧭 How to find it (practical)
Seated or supine, locate the point on the posterior margin of the tibia, 3 cun above the apex of the medial malleolus.
🔬 Anatomy
Flexor digitorum longus, soleus, and tibialis posterior muscles. Innervated by the saphenous nerve and the tibial nerve. The posterior tibial artery and vein run deep.
💉 Needling
Perpendicular or proximally directed oblique insertion, 1 to 2 cun.
📜 Etymology
San Yin (三阴), three Yin meridians; Jiao (交), crossing. This is the intersection point of the Spleen-Pancreas Meridian, Tai Yin of the Foot, the Liver Meridian, Jue Yin of the Foot, and the Kidney Meridian, Shao Yin of the Foot.
