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contentuptodate· Content· item f43_9_44179

©2013 UpToDate ® Print Email Anesthesia machine charcoal filter Anesthesia machines no longer need to be flushed through with oxygen prior to use by a MH-susceptible patient. A charcoal filter attached to the inspiratory and expiratory breathing circuit limbs effectively prevents anesthestic gases from reaching the patient. It should also be used when an acute MH crisis is diagnosed to limit further exposure of anesthetic gas to the patient. MH: malignant hyperthermia.