• Dante Pazzanese Institute of Cardiology, Sao Paulo, Brazil.
• J. Cardiothorac. Vasc. Anesth. 2017 Aug 1; 31 (4): 1218-1222.

ObjectiveConcerns regarding pollution of the operating room by volatile anesthetics and effects on atmospheric ozone depletion exist. Volatile agents commonly are used during cardiopulmonary bypass to provide anesthesia independent of any supposed myocardial protective effects. The authors' aim was to create and to assess the performance of a prototype filter for volatile agents to be connected to the cardiopulmonary bypass circuit to avoid the emission of volatile agents to the operating room, and also to the environment without causing damage to the membrane oxygenator.DesignObservational trial.SettingUniversity hospital.ParticipantsPrototype filter for volatile agents.InterventionsThe prototype filter was tested in a single ex vivo experiment. The main data measured during the test were pressure drop to detect interference with the performance of the oxygenator, back pressure to detect overpressure to the outlet gas jacket of the oxygenator, analysis of exhaled sevoflurane after the membrane oxygenator, and after the filter to detect any presence of sevoflurane.Measurements And Main ResultsThe prototype filter adsorbed the sevoflurane eliminated through the outlet portion of the oxygenator. During the entire test, the back pressure remained constant (4 mmHg) and pressure drop varied from 243 mmHg to 247 mmHg.ConclusionThe prototype filter was considered suitable to absorb the sevoflurane, and it did not cause an overpressure to the membrane oxygenator during the test.Copyright © 2017 Elsevier Inc. All rights reserved.

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