A Retrospective Study on Needling Depth of Hwangmun (BL51) and Jisil (BL52) with MRI

Objectives : The aim of this study is to investigate the needling depth of Hwangmun (BL51) and Jisil (BL52) retrospectively using an L-spine MRI. Methods : We measured the shortest distance from the skin to transversalis fascia at both sides of Hwangmun and Jisil, and analyzed the difference between male and female using a student t-test, and between the left and right sides with a paired t-test. Results : In the case of males, the average depth of left Hwangmun was 48.24 ± 10.16 mm, and that of right was 47.23 ± 9.59 mm ; left Jisil was 56.91 ± 9.00 mm and right was 55.74 ± 8.75 mm. In the case of females, the average depth of left Hwangmun was 42.26 ± 9.29 mm, and that of right was 41.63 ± 9.32 mm ; left Jisil was 49.21 ± 10.77 mm and right was 48.41 ± 11.38 mm. The depth of male insertion was deeper than that of female in Jisil, but there was no significant difference according to gender in Hwangmun. Conclusion : For males, the needling depth of left Hwangmun is 37.21 ~ 68.23 mm and right is 36.91 ~ 70.50 mm, while left Jisil is 42.97 ~ 70.84 mm and right is 43.75 ~ 72.00 mm. For females, the needling depth of left Hwangmun is 26.80 ~ 68.28 mm and right is 25.70 ~ 65.59 mm, while left Jisil is 30.94 ~ 79.06 mm and right is 28.13 ~ 77.27 mm.