Fig. (3) Acoustic respiratory rate monitoring device from Masimo. (a) Acoustic monitoring sensor placed on the neck via an adhesive coating. (b) The display (Masimo Rad-87) showing arterial oxygen tension, heart rate and respiratory rate respectively. Image used under a Creative Commons Attribution License 4.0 from Suzuki T, Tsuda S, Nakae H, et al. Usefulness of Acoustic Monitoring of Respiratory Rate in Patients Undergoing Endoscopic Submucosal Dissection. Gastroenterol Res Pract. 2015;2016:2964581.PMID: 26858748. iii. For example, see