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1 Department of Surgery (Anesthesiology), The New York Hospital and Cornell University Medical College, New York, N. Y.
1. A detailed study of the first stage of anesthesia is described.
2. A plane of stage one (plane 3) has been used successfully in 115 consecutive patients undergoing major cardiac surgery.
3. Deleterious reflex activity has not been observed in stage Iplane 3 of ether anesthesia.
4. The stage of delirium is not seen, after the first stage of anesthesia has once been established, by the technique described.
5. A specific electroencephalographic pattern for ether analgesia (stage I plane 3) has been defined.
Submitted on March 15, 1954