How many cun is the distance from the symphysis pubis to the medial condyle of the femur?

The distance from the symphysis pubis to the medial condyle of the femur is traditionally measured as 18 cun in most acupuncture textbooks and clinical practice. In acupuncture, the cun is a standardized measure based on the practitioner's own anatomical landmarks, and it is typically calculated as the width of the patient's thumb at its widest part.

It is important to know this measurement for accurate acupuncture point location and assessment of body proportions in treatment planning. The 18 cun distance is crucial for identifying acupuncture points along the leg, particularly when locating points relevant to conditions affecting the lower body or when performing treatments that involve the knee or hip area. Understanding anatomical measurements helps maintain consistency across various practitioners, ensuring effective treatment methodologies in acupuncture.