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TB-9 Four Rivers

四渎 〔四瀆〕sì dú

Channel: TB, Hand Lesser Yáng (shào yáng) Triple Burner Channel

Modern location: An acupoint located on the posterior aspect of the forearm, 5 cùn distal to the tip of the olecranon, midway between the radius and the ulna.

Classic location: Five cùn in front of the elbow, in the depression on the outer side. (Zhēn Jiǔ Dà Chéng)

Local anatomy: See TB-7.

Action: Courses the channels and quickens the network vessels; regulates the waterways; disinhibits the throat and opens the orifices.

Modern indications: Deafness; painful swollen throat; fulminant loss of voice; toothache; impediment pain (bì tòng) in the upper limbs.

Classic indications: Blocked sensation in the throat.

Needle stimulus: Needling: 0.5‒1.0 cùn perpendicular insertion. Moxa: 3 cones; pole 5‒10 min.

Needle sensation: Distension and numbness, spreading toward the hand or elbow.

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