摘要
目的研究脉搏氧饱和度仪反应迟滞时间在小儿麻醉诱导中的作用。方法将80例择期整形外科手术的小儿随机平均分成Ⅰ组和Ⅱ组。静脉麻醉诱导前小儿用MaplesonD环路自主预吸氧2min。在麻醉诱导后的无通气期,观察SpO2降至99%、95%和90%(仅Ⅰ组)的时间。Ⅰ组和Ⅱ组小儿分别在SpO2降低至90%和95%时给氧。结果SpO2降至99%和95%所需的时间在两组之间无明显差别。由于脉搏氧饱和度仪的反应迟滞时间,再建人工呼吸后小儿的SpO2在5～30秒内仍然继续下降,并达其最低值。SpO2在Ⅰ组和Ⅱ组降至的最低值分别为(78.09±1.65)%和(90.71±0.43)。结论在应用脉搏氧饱和度仪监测时,在小儿预氧后的无通气期,一旦发现SpO2≤95%,应立即给氧人工通气,以免发生低氧血症。
Objective To determine the signifcance of the lag time of pulse oximeter response during anesthesia induction. Methods 80 children, ASA grade Ⅰ , aged 5 months to 6.5 years, scheduled for elective plastic surgery were randomly divided equally into Group 1 and Group 2. Children breathed 100% oxygen 8L/min for 2min via a Mapleson D system before anesthesia induction. During the apnea period, the times for SpO2 decrease to 99% （ T99 ） and 95% （ T95 ） in all patients, and 90% （Tg0） in Group 1 were recorded. The patients were manually ventilated with 100% oxygen when SpO2 declined to 90% in Group 1 and 95% in Group 2, respectively. Results There was no significant difference between the two groups in T99 and T95. After reinstitution of manual ventilation with 100% oxygen, SpO2 still continued to decrease to its lowest value after 5 to 30 seconds because of the lag time of pulse oximeter response. The lowest values of SpO2 were （78.09 ± 1.65 ）% in Group 1 and （90. 71 ± O. 43 ） % in Group 2, respectively. Conclusion As soon as an SpO2 ≤ 95% be seen in an apneic child under monitor off a pulse oximeter, manual ventilation with 100% oxygen should be instituted immediately to prevent hypoxemia occurring.
出处
《医药论坛杂志》
2005年第17期16-18,共3页
Journal of Medical Forum
