《黄帝内经·素问·脉要精微论》
尺肤的上部逐渐向上，右臂外侧用来诊察肺，右臂内侧用来诊察胸中；左臂外侧用来诊察心，左臂内侧用来诊察膻中。
上附上，右外以候肺，内以候胸中，左外以候心，内以候膻中。
The upper part of the shakufu is gradually up, the lateral side of the right arm is used for the lung examination, and the medial side of the right arm is used for the examination of the chest; the lateral side of the left arm is used for the examination of the heart, and the medial side of the left arm is used for the examination of the interspace between the chest and diaphragm.