Studies of the Effects of Hypnoanesthesia on Regional Blood Flow by Transcutaneous Oxygen Monitoring

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Abstract
When hypnoanesthesia is produced in a deeply hypnotized subject by suggesting immersion of the hand in cold water, the veins of the hand collapse. This collapse of the veins denotes a marked reduction of the regional blood flow of the hand. This phenomenon was investigated in six healthy volunteers through the use of a transcutaneous oxygen monitor. In this experiment it was noted that, immediately after trance induction, blood flow in both hands starts to increase. After suggesting to the subject to imagine one hand put in ice-cold water, blood flow in this hand either ceased to increase, or actually decreased. The transcutaneous oxygen monitor may be a potentially useful tool to assess both the depth of hypnosis and the subject's suggestibility.

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