When needling DU-14, how far is the spinal canal from the skin surface?

The distance from the skin surface to the spinal canal at the location of DU-14 (Da Zhui) is indeed between 1.25 and 1.75 cun. This acupuncture point is located on the midline of the back, at the level of the seventh cervical vertebra (C7), which is situated just below the prominent spinous process of the cervical spine.

Understanding the anatomical landmarks and the depth of needle insertion is crucial for effective and safe acupuncture practice. The spinal canal at DU-14 is shallow, and the range of 1.25 to 1.75 cun indicates that care should be taken not to insert the needle too deeply to avoid puncturing the spinal cord or causing discomfort.

The other options suggest a deeper location that does not reflect the anatomical reality of the area surrounding DU-14. Accurate knowledge of these distances enhances both the efficacy of treatment and the safety of the patient, making it essential for practitioners to be well-versed in these metrics.