The Authors have investigated the antihallucinogenic and sedative effects of auricular points R and shen menn during surgery under ketamine anesthesia.

The results demonstrate that the insertion of the needle in point R is very efficient in reducing hallucinations of ketamine emergence, while the insertion of needle in auricular point shen menn causes only a brief period of sedation in the beginning of the emergence period.

The acupunctural technique employed by the Authors has been shown to increase considerably approbation of ketamine anesthesia.