Biomedical subjects
Publications and source records attributed to F C Quarnstrom.
Triazolam (0.125 to 0.25 mg) was administered preoperatively to 17 unmanageable children aged 22 to 65 months. The children were monitored visually and by pulse oximeter. No child experienced any airway obstruction and none had oxygen saturation below 90%. Older children had lower SaO2 values than younger children. There was no relationship between the mg/kg dose and SaO2 values.
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In order to estimate the incidence of diffusion hypoxia, arterial oxygen saturation was measured in 104 healthy adult dental patients who were administered nitrous oxide-oxygen analgesia and who did not receive postcessation oxygen. Pretreatment saturation levels as determined by pulse oximetry ranged from 93% to 100%. When the nitrous oxide-oxygen administration ceased, the saturation levels were from 95% to 100%. The mean saturation dropped about 2% over the next 4 min and then stabilized. No patient had a posttreatment oxygen saturation of less than 92%.
Transcutaneous electrical nerve stimulation (TENS) alone or TENS combined with nitrous oxide-oxygen (N2O) was administered for restorative dentistry without local anesthesia to 371 adult patients. A total of 55% of TENS alone and 84% of TENS/N2O visits were rated successful. A total of 53% of TENS alone and 82% of TENS/N2O patients reported slight or no pain. In multivariable analyses, pain reports were related to the anesthesia technique and patient fear and unrelated to sex, race, age, tooth, or depth of preparation.