Change of Safe Needling Depth at Acupoint GB21 according to Posture and Breathing

Figure 6

Difference of safe needling depth at GB21 according to BMI group and position. Depth of the pleural membrane according to subject position divided by BMI group. The white bar represents the underweight group; the gray bar, the normal weight group; and the black bar, the overweight group. Data are mean ± SD values of the depth of the pleural membrane. BMI: body mass index; StP: sitting position; PPA: prone position A; PPB: prone position B.