Which BL point is located 1.5 cun lateral to the midline, at the level of the third posterior sacral foramen?

Which BL point is located 1.5 cun lateral to the midline, at the level of the third posterior sacral foramen?

• A. BL 27
• B. BL 29
• C. BL 28
• D. BL 31

Answer: (B)

The main idea is how the bladder meridian points are laid out in the sacral region: a series of points located at the posterior sacral foramina, each about 1.5 cun lateral to the midline. At the level of the third posterior sacral foramen, the point described is BL-29. This location—1.5 cun off the midline and aligned with that specific foramen—is what identifies the correct point in this area. The other options sit at neighboring sacral levels, so they don’t match the described location.

The main idea is how the bladder meridian points are laid out in the sacral region: a series of points located at the posterior sacral foramina, each about 1.5 cun lateral to the midline. At the level of the third posterior sacral foramen, the point described is BL-29. This location—1.5 cun off the midline and aligned with that specific foramen—is what identifies the correct point in this area. The other options sit at neighboring sacral levels, so they don’t match the described location.