Flunitrazepam, a derivative of benzodiazepine was used for induction and maintenance of anaesthesia in 933 patients. The induction dose was from 1,786 to 2,053 mg. The total dose of 2-2.66 mg was sufficient for maintenance of hypnosis for about 2 hours. The undesirable side effects were very rare. The average time of hypnosis after a single dose of flunitrazepam was 50.1 sec. The sedative action of the drug lasted for some time after regaining of consciousness. In most patients there was no need for administration of analgetics during first 24 hours after the operation.
An approach to outpatient anesthesia using drugs that have reversible or very short-acting effects is described, along with a method of monitoring patients using pulse rate to assess tranquility. Preoperatively, the patient is given 1 mg of lorazepam the evening before surgery and sublingual lorazepam 1 mg combined with hydroxyzine 50 mg intramuscularly one hour before surgery. Before infiltration of local anesthesia, intravenous diazepam in 2.5 mg increments is given if needed, followed by a mixture of meperidine and pentazocine intravenously in exactly a 10:1 ratio.