Figure 1: Experimental setups used in this study. Note: (A) The circle breathing system is connected to the test lung (right side), which is equipped with two bag-valve units (BV), each with a volume of 2 L. Air (1) and oxygen (2) are connected to an anesthesia gas scavenging system (3). The Aisys CS^TM (4), which consists of an electronic control mechanism and the Aladin 2 vaporization cassette, is connected to the test lung box via a heat moisture exchanger (5). (B) The MIRUS^TM system (left), which is ventilated by a Bennett 840 ventilator with air (1) and oxygen (2), is connected to an anesthesia gas scavenging system (3). The ventilator is connected with a Y-piece to the Mirus Controller unit and the Exchanger unit (4). The MIRUS^TM device is connected to the test lung (right side) with two BV and 2 L volume each via a heat moisture exchanger (5). Gas samples are collected at the test lung and analyzed by a gas monitor. ICU: Intensive care unit.