Fig. 1From: Heat and moisture exchanger use reduces in-hospital complications following total laryngectomy: a case–control studyPresence of adverse events based on HME use. Use of HME reduced the chances of an adverse event by an OR of 8.27. Of the 24 patients with an adverse event, 3 used an HME and 21 used EH. However 13 of 24 patients without an adverse event used an HME, and 11 did notBack to article page