顔面部の触覚・痛覚に及ぼす笑気吸入の影響
スポンサーリンク
概要
- 論文の詳細を見る
This study was undertaken to examine the effects of nitrous oxide (N_2O) inhalation on tactile and pain thresholds measured on the buccal skin of human. The subjects consisted of 28 healthy men aged 23-28 years with a mean of 24.7 years and weighed 50-90kg with a mean of 65.1kg. The subjects were divided into four groups according to which of four gases they inspired, 30%, 50%, 65% N_2O mixed with oxygen, and 100% oxygen as a control. Nylon threads with three different diameters and lengths and analgesiometers were used for measurements of tactile and pain thresholds, respectively. The subjects were instructed to recline on a dental chair comfortably in the supine position. After ten minutes' rest, measurements were started three times each at 10-minute intervals during breathing room air as a control, during inhaling the respective concentration of N_2O and during withdrawal period. The data calculated as the maximum possible effect were statistically compared with those of the control group. The results obtained were as follows. 1) Thresholds of tactile sensibilities on the buccal region were increased to 34%, 34% and 17% up from the control in 30%, 50% and 65% N_2O gpoups, respectively, but there were no significant differnces from the control value. 2) Thresholds of pain sensibilities on the buccal region showed significant increases from control value and 100% O_2 group (control group) during N_2O inhalation period in N_2O groups except at 20 and 30 minutes' point in 30% N_2O inhalation. 3) In physiological variables, there was no significant difference from the control value and 100% O_2 group (control group) such as heart rates, blood pressure, respiratory rate and oxyhemoglobin in every N_2O administration. These results indicate that analgesic effects of nitrous oxide at the buccal region in human face exist even in 30% N_2O and these effects are enhanced in accordance with that dose although there are no effects on tactile sensibilities and cardio-pulmonary function.
- 九州歯科学会の論文
- 1994-06-25