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

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

• A. BL 27
• B. BL 29
• C. BL 28
• D. BL 30

Answer: (C)

The Bladder channel has a row of back-shu–style points along the sacrum, each located 1.5 cun lateral to the midline at the level of a posterior sacral foramen. These four points align with the foramina from top to bottom: first, second, third, and fourth. The level described as the second posterior sacral foramen corresponds to BL28. So, a point 1.5 cun to the side at that level is BL28. The other sacral-foramen levels correspond to the other BL points (BL27, BL29, BL30), but not to the second foramen.

The Bladder channel has a row of back-shu–style points along the sacrum, each located 1.5 cun lateral to the midline at the level of a posterior sacral foramen. These four points align with the foramina from top to bottom: first, second, third, and fourth. The level described as the second posterior sacral foramen corresponds to BL28. So, a point 1.5 cun to the side at that level is BL28. The other sacral-foramen levels correspond to the other BL points (BL27, BL29, BL30), but not to the second foramen.