Comparison of Heat and Humidity Conservation Among Different Anesthesia Workstation and Different Flow Rate.
试验速览
- 阶段
- 4 期
- 入组人数
- 60
- 试验地点
- 1
- 主要终点
- absolute humidity at both limb of breathing circuit just distal portion of Y-piece
研究概览
简要总结
The effects of preserving humidity and temperature by low flow anesthesia are different in each other anesthesia workstation.
详细描述
The fresh gas flow(FGF) is dry and cold in old fashioned anesthesia machine, especially at high folw (above 1 L/min). To the contrary, it has been assumed that the heat and humidity of FGF may be preserved using low FGF (below 1 L/min) during anesthesia or new anesthesia work station. However, it has not been proved yet. We hypothesized that the heat and moisture of FGF may be different in various FGF rate during anesthesia. In addition, it may be different in accordance to anesthesia work station. Therefore, we planed prospective observational study that will demonstrate that the difference of heat and moisture of FGF in different anesthesia work station (Excel; 1st generation anesthesia machine of Datex-Ohmeda Corp., Avance; 2nd generation anesthesia work station of Datex-Ohmeda Corp., Cato; 2nd generation generation anesthesia work station of Drager, Primus; 3rd generation generation anesthesia work station of Drager) and different FGF (0.5, 1, 4 L/min)
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Single Group
- 主要目的
- Health Services Research
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •patients who planned more than 2 hour operation under general anesthesia
- •ASA class 1,2
- •blood loss less than 500ml
排除标准
- •acute/chronic cardiac or respiratory disease
结局指标
主要结局
absolute humidity at both limb of breathing circuit just distal portion of Y-piece
时间窗: time point 1-11
time point 1; base line value (fresh gas flow(FGF); 8L/min) time point 2; 5 mintues(min) after FGF change to predetermined level time point 3; 10 min after FGF change to predetermined level time point 4; 15 min after FGF change to predetermined level time point 5; 30 min after FGF change to predetermined level time point 6; 45 min after FGF change to predetermined level time point 7; 60 min time point 8; 75 min time point 9; 90 min time point 10; 105 min time point 11; 120 min
次要结局
- patient body temperature(BT)(time point 1 -11)
- temperature at both limb of breathing circuit just distal portion of Y-piece(time point 1- 11)