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Table 2 Acupoint selection and rationale based on traditional Chinese medicine

From: Effect of electroacupuncture on discomfort during gastroscopy: a study protocol for a randomized controlled trial

Acupoint Location Traditional Chinese medicine indication Suggested technique
LI4 (Hegu) Dorsum of hand, at the level of the midpoint of the second metacarpal bone, between the first and second metacarpal bones Relieve visceral pain Needle perpendicular,0.5–1.0 cun
PC6 (Neiguan) Palmar aspect of the forearm, between the tendons, 2 cun away from the transverse crease of the wrist Reduce nausea and stomach pain Needle perpendicular,0.5–1.5 cun
ST36 (Zusanli ) Antero-lateral leg, 1 middle-finger breadth next to the anterior crest of tibia, 3 cun under the depression lateral to the patellar ligament Reduce nausea and stomach pain Needle perpendicular,1–2 cun
ST34 (Liangqiu) 2 cun above the bottom of the patella, on the line between the anterior superior iliac spine and the lateral end of the bottom of the patella Relieve stomach pain Needle perpendicular,1–1.2 cun