Fig. 2. Bland and Altman comparison of distal esophageal temperature and “deep sternal” temperatures. The vertical axis is the difference between esophageal and deep sternal temperatures. Mean temperature on the horizontal axis refers to the average between esophageal and deep sternal temperatures at each measurement time. The mean offset was 0.1°C, with an SD of 0.3°C. This accuracy is perfectly adequate for clinical use. From Matsukawa et al. 20; used with permission.