Deep perpendicular or medial insertion carries substantial risk of pneumothorax. Caution: do not direct the needle medially, as deep perpendicular or oblique insertion can cause pneumothorax.
📍 Location (classical)
On the superolateral aspect of the chest, above the coracoid process of the scapula, in the depression of the infraclavicular fossa (in the center of the deltopectoral triangle), 6 cun lateral to the anterior midline.
🧭 How to find it (practical)
Seated with the hand on the hip, locate the point in the center of the inferior triangular depression of the infraclavicular fossa.
🔬 Anatomy
Pectoralis major muscle, anterior fibers of the deltoid. Innervated by the supraclavicular nerve and the lateral and medial pectoral nerves.
💉 Needling
Oblique insertion to a maximum depth of 0.8 cun, or transverse-oblique insertion of 0.5 to 1 cun.
📜 Etymology
Yun (雲), cloud; Men (門), gate. Yun refers to Lung Qi. The point sits on the upper part of the chest, like a gateway for Qi of the Lung.
