Table 1

Acupoint locations and standards for locating acupoints used in this trial*

AcupointsLocations of the acupointsProcedures for locating the acupoints
ST34 (梁丘)On the anterolateral aspect of the thigh, between the vastus lateralis muscle and the lateral border of the rectus femoris tendon, 2 B-cun superior to the base of the patellaPutting the thigh muscle under tension, the rectus femoris tendon and the vastus lateralis muscle are more distinct. ST34 is located between the muscle and the tendon, 1 B-cun directly inferior to ST33.
ST36 (足三里)On the anterior aspect of the leg, at the tibialis anterior muscleOn the line connecting ST35 with ST41, 3 B-cun inferior to ST35
ST40 (豐隆)On the anterior aspect of the leg, lateral border of the tibialis anterior muscle; it is 8 B-cun superior to the prominence of the lateral malleolusST40 is one middle finger breadth lateral to ST38.
ST42 (沖陽)On the dorsum of the foot, at the joint of the base of the second metatarsal bone and the intermediate cuneiform boneOver the dorsalis pedis artery
CV12 (中脘)On the upper abdomen, 4 B-cun superior to the centre of the umbilicus, on the anterior median lineIt is located at the midpoint of the line connecting the xiphisternal junction and the centre of the umbilicus.
PC6 (内關)On the anterior aspect of the forearm, between the tendons of the palmaris longus and the flexor carpi radialis, 2 B-cun proximal to the palmar wrist creaseWith the fist clenched, the wrist supinated and the elbow slightly flexed, the two tendons become more prominent. PC6 is located 2 B-cun proximal to PC7.
BL20 (脾俞)In the upper back region, at the same level as the inferior border of the spinous process of the 11th thoracic vertebra (T11)At the T11 level, 1.5 B-cun lateral to the posterior median line
BL21 (胃俞)In the upper back region, at the same level as the inferior border of the spinous process of the 12th thoracic vertebra (T12)At the T12 level, 1.5 B-cun lateral to the posterior median line
  • *Adopted from WHO. WHO standard acupuncture point locations in the Western Pacific Region. WHO standard acupuncture point locations in the Western Pacific Region 2008.

  • B-cun, proportional bone (skeletal) cun.