Department of Anesthesiology, Vanderbilt University Medical Center, 1301 Medical Center Dr., 4648 TVC, Nashville, TN 37232, USA.
Anesth Analg. 2011 Nov;113(5):1064-7. doi: 10.1213/ANE.0b013e31822c9a2c. Epub 2011 Aug 24.
Waste anesthetic gas scavenging technology has not changed appreciably in the past 30 years. Open reservoir systems entrain high volumes of room air and dilute waste gases before emission into the atmosphere. This process requires a large vacuum pump, which is both costly to install and, although efficient, operates continuously and at near-full capacity. In an era of increasing energy costs and environmental awareness, carbon footprint reduction is a priority and a more efficient system of safely scavenging waste anesthetic gases is desirable. We tested a low-flow scavenger interface to evaluate the potential for cost and energy savings. The use of this interface in a suite of 4 operating rooms reduced scavenging flow from a constant 37 L/min to a value equal to the fresh gas flow (usually 2 L/min) for each anesthesia machine. Using the ventilator increased this flow by approximately 6 L/min because of the exhaust of ventilator drive gas into the scavenging circuit. Daytime workload of the central vacuum pump decreased from 92% to 12% (expressed as duty cycle). The new system produces energy savings and may increase vacuum pump lifespan.
在过去的 30 年中，废气麻醉气体清除技术并没有明显改变。开放式储液罐系统会在排放到大气之前，吸入大量的室内空气并稀释废气。这一过程需要一个大型的真空泵，不仅安装成本高昂，而且虽然效率高，但却需要持续运行并接近满负荷运行。在能源成本不断上涨和环保意识日益增强的时代，减少碳足迹是当务之急，因此需要一种更高效的安全清除废气麻醉气体的系统。我们测试了一种低流量废气清除接口，以评估其节省成本和能源的潜力。在一个由 4 个手术室组成的套件中使用该接口，将废气清除流量从恒定的 37 L/min 降低到与每台麻醉机的新鲜气体流量（通常为 2 L/min）相等的值。由于呼吸机驱动气体排入废气清除回路，使用呼吸机时会使流量增加约 6 L/min。中央真空泵的日间工作负载从 92%降至 12%（表示为工作周期）。新系统可节省能源并延长真空泵的使用寿命。
