RESUMO
OBJECTIVE: To explore and compare the safety depths of perpendicular and oblique acupuncture at Yamen (GV 15) in patients with atlantoaxial dislocation (AAD) and healthy volunteers. METHODS: One bundred and seventy-seven patients with atlantoaxial dislocation were selected as an AAD group, and 207 patients without atlantoaxial dislocation and with normal anatomical structure were selected as a normal group. All participants were moderately sized. The MRI scanning of the cervical vertebra was performed, and the safety depth of perpendicular and oblique acupuncture at Yamen (GV 15) was calculated on the sagittal image. RESULTS: In the AAD group, the safety depth of men was (45.33±5.17) mm for perpendicular acupuncture and (48.58±4.41) mm for oblique acupuncture; the safety depth of women was (44.17±7.80) mm for perpendicular acupuncture and (47.49±7.32) mm for oblique acupuncture. In the normal group, the safety depth of men was (47.72±5.06) mm for perpendicular acupuncture and (42.69±5.53) mm for oblique acupuncture; the safety depth of women was (44.63±5.85) mm for perpendicular acupuncture and (39.88±6.18) mm for oblique acupuncture. The safety depth of men and women for oblique acupuncture was longer than that for perpendicular acupuncture in the AAD group (P<0.01); the safety depth of men and women for oblique acupuncture was shorter than that for perpendicular acupuncture in the normal group (P<0.01). The safety depth of perpendicular and oblique acupuncture between men and women was not significant in the AAD group (P>0.05); the safety depth of perpendicular and oblique acupuncture for men was longer than that for women in the normal group (P<0.01). For men, the safety depth of perpendicular acupuncture in the AAD group was shorter than that in the normal group (P<0.01), while the safety depth of oblique acupuncture in the AAD group was longer than that in the normal group (P<0.01). For women, the safety depth of perpendicular acupuncture in the AAD group was similar with that in the normal group (P>0.05), while the safety depth of oblique acupuncture in the AAD group was longer than that in the normal group (P<0.01). CONCLUSION: The safe depth of acupuncture at Yamen (GV 15) has significantly changed under AAD, so during the clinical acupuncture the needle insertion should be less than its safe depth.
