In the observation group , acupuncture was applied at Neiguan ( PC 6 ) , Shuigou ( GV 26 ) , Baihui ( GV 20 ) , Sishencong ( EX-HN 1 ) , Fengchi ( GB 20 ) , Hegu ( LI 4 ) , Sanyinjiao ( SP 6 ) and Taichong ( LR 3 ) , and hyperbaric oxygen treatment was given as well .