[Dynamic Changes of Ultrasonographic Images of Zusanli (ST 36) Region During Deqi of Acupuncture Needle Stimulation].

OBJECTIVE: To observe the dynamic changes of ultrosonographic images of Zusanli (ST 36) area during Deqi after inserting acupuncture needles, so as to provide objective evidence for clinical Deqi.

METHODS: Sixty healthy volunteers (30 men and 30 women) were recruited in the present study. The subjects were asked to take a supine position on a test-bed, sterilized disposable filiform needles were perpendicularly inserted into bilateral ST 36 till Deqi (without lifting, thrusting and twirling), when, high-resolution ultrasound scanning was conducted over the regional skeletal muscles by using a radio-frequency (5-12 MHz) coil probe (Philips IU Elite Ultrasound Diagnostic Instrument) after smearing a layer of gel at the skin of ST 36.

RESULTS: Among these 120 points of the 60 volunteer subjects, a marked Deqi was obtained from 108 points (consisting of 90%) including 52 points in men and 56 in women, and 53 at the left ST 36 and 56 at the right ST 36. Ultrosonographic scanning displayed that when a strongest Deqi feeling was obtained from bilateral ST 36 in these 60 volunteers, the acupuncture needle-tip was about (25.32±5.82) mm in the vertical depth, and was (5.45±0.55) mm lateral to the tibia, involving the anterior tibial muscle near the deep fascia in 46 acupoints, and the intersection fascia of anterior tibial muscle and extensor digitorum longus in 62 acupoints.

CONCLUSIONS: The anterior tibial muscle near the deep fascia and the intersection fascia of anterior tibial muscle and extensor digitorum longus around ST 36 are involved in strongest Deqi. There are no significant differences in the gender and location (left and right).