4.7 The Bladder Channel System – Foot taiyang(zu tai yang jing luo)Location
1.5 cun lateral to the posterior midline, on the level of the 3rd
sacral foramen.How to find
For more detail on orientation in the lumbar and sacral region,
see ➞3.4.3, 3.4.4. First of all find L5. The next palpable struc-
ture in an inferior direction is the most superior sacral spinous
process. Palpate in an inferior direction for two further sacral
processes and locate the 3rd sacral foramen in a depression less
than 1 cun lateral to the 3rd process. BL-29is located on the same
level (3rd sacral foramen) and 1.5 cun lateral to the midline.
Also located on this level is ➞BL-33(over the 3rd sacral
foramen).Needling
Vertically 0.5–1.5 cunActions/Indications
● Strengthens the lower back and the Kidneys
● Expels Cold
● Regulates the Lower Burner and stops diarrhoeaMid Spine Shu ZHONGLÜSHU BL-29
Midline1.5 cunLevel of the
iliac crestsSpinous process L4Spinous process L5Sacral
foramina BL-29Lumbosacral
junctionSacrumPSISTuffier‘s line Iliac crestL4L5SacrumIliumIliosacral jointsSacral foramen 1
2
3
4BL-31
BL-32
BL-33
BL-3423254354Ex-B-6(^523)
4
5
2
36
30
1
Bladder channel,
lateral branch
Bladder channel,
medial branch
Du mai
Ex-B-5
Ex-B-8
Ex-B-5
Ex-B-7
Ex-B-11
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