5.3 Du maiLocation
On the midline, below the spinous process of the 4th lumbar ver-
tebra (L4).How to find
For orientation in the lumbar region (➞3.4.3), first, locate the
Tuffier’s line (a line connecting the two most superior points on the
iliac crest), which generally intersects with the spinous process of
L4. (Note: Point location in the lumbar region is dependent on the
patient’s position; for more detail on orientation ➞3.4). Locate
Du-3on the midline, below the spinous process of L4.
Located on the same level are a point of ➞Ex-B-2/BL-25/
Ex-B-6/Ex-B-7(0.5/1.5/3/3.5 cun lateral to the midline).Needling
0.5–1 cun strictly vertically to the skin or obliquely in an inferior
direction (generally, there is only danger of accidental puncture
of the spinal canal from the level of L2 in a cranial direction).Actions/Indications
● Dispels Wind, Cold and Dampness
● Regulates Qi in the Lower Burner, strengthens the Original
Qi (yuan qi)Special features
Important local point for combined back and leg painLumbar Yang Gate YAOYANGGUAN Du-3
Level of the
iliac crests Spinous process C4
Spinous process C5Du-3Spinous process C3Spinous process C2Spinous process C1Level of L4Level of the iliac crestsDu-3Spinous
Level of process L4
the iliac
crestsBL-23
BL-52Du- 4Tuffier's lineMidlineBL-25Spinous process L1
Spinous process L2(dependent on
patient position)Level of the
iliac crestsL4Level of the
iliac crests
Ex-B-6Spinous process L4Spinous process L3Spinous process L2Spinous process L1Ex-B-2
(parts)Spinous process L3
Level of theSpinous process L4
iliac crests Ex-B-7Ch05b-F10028.qxd 2/22/08 9:55 PM Page 501