At the level of the spinous process of T10, aligned with Danshu BL‑19, which BL point is located 3 cun lateral to the midline?

• A. Bl 46
• B. Bl 49
• C. Bl 48
• D. Bl 50

Answer: (C)

The question tests locating back-point positions by vertebral level and a fixed lateral distance from the midline. For the Bladder channel on the back, a point located 3 cun lateral to the midline at a given spinous process level sits on that level’s transverse line.

Danshu BL‑19 sits at the T9 level, 1.5 cun lateral to the midline. If you move down to the T10 level and keep the same 3‑cun lateral offset, you arrive at the BL point situated there, which is BL‑48. The other points correspond to different vertebral levels along the back and do not align with the T10 3‑cun lateral position. So the point at T10, 3 cun from the midline, is BL‑48.