Ponto Xi-FendaPonto Xi-Fenda do canal do PulmãoSafeCostas
Depth
00.5–1.5 cun3.0
Perpendicular insertion
Precautions
No special precautions.
📍 Location (classical)
On the radial border of the posterior aspect of the forearm, 5 cun distal to LU-5 (or 7 cun proximal to the wrist joint space / LU-9), on the line connecting LU-5 and LU-9.
🧭 How to find it (practical)
On the forearm with the palm facing up, locate the point 5 cun distal to Chi Ze (LU-5) (or 7 cun proximal to the wrist crease / Tai Yuan LU-9), on the line connecting Chi Ze (LU-5) to Tai Yuan (LU-9), on the medial border of the radius (WHO 2008, §LU-6).
🔬 Anatomy
Brachioradialis muscle, pronator teres muscle. Innervated by the lateral cutaneous nerve of the forearm and the superficial branch of the radial nerve.
💉 Needling
Perpendicular insertion, 0.5–1.5 cun.
📜 Etymology
Kong (孔), opening, aperture; Zui (最), the supreme, the maximum. As the Xi-Cleft point of the Lung Meridian, it is the maximum aperture where the channel Qi gathers most deeply — the best point for releasing blocked flow of Lung Qi (Deadman, A Manual of Acupuncture, 2007, p. 74).
