建议风池穴针刺的深度控制在 3 4.80mm之内Objective: To probe into the anatomic structure and safe needling depth of Fengchi (GB 20) acupoint. Methods: Fifty-seven fresher adult corpses were randomly selected. Among them
24 were male and 33 female. Anatomic cross-sectional method and anatomic lamelled method were used to study the anatomic structure and needling depth. Put the studied corpse into the low-temperature refrigerator (below -30 ℃) for 4 days
then the tissues around Fengchi (GB 20) were sectioned horizontally. When the ice melted
the distance from the skin to the surface of the upper end of the spinal cord was detected with an electronic digital ruler. In 6 corpses for lamina analysis
the anatomical structure of GB-20 was observed. Results: The anatomic structures of insertion of an acupuncture needle in order are: skin
superficial fascia
tissues between trapezius muscle and sternocleidomastoid muscle
musculus splenius capitis
musculus semicpinalis
musculus rectus capitis posterior major and membrane atlantooccipitalis posterior. Conclusion: The mean dangerous depth for perpendicular insertion of acupuncture needle is 49.71 mm
and for safe needlingty
it is proposed that the depth for perpendicular needling is within 34.80 mm.