1. Birmingham PK, Cheney FW, Ward RJ. Esophageal intubation: a review of detection techniques. Anesth Analg. 1986;65:886–91.
2. Brand TM, Brand ME, Jay GD. Enamel nail polish does not interfere with pulse oximetry. J Clin Monit Comput. 2002;17:93.
3. Busch MR, Mace JE, Ho NT, Ho C. Roles of the beta 146 histidine residue in the molecular basis of the Bohr effect of hemoglobin: a proton nuclear magnetic resonance study. Biochemistry. 1991;30:1865.
4. ECRI Health Devices Program. Carbon dioxide monitors. Health Devices. 1986;15:255–85.
5. Fluck Jr RR, Schroeder C, Frani G, et al. Does ambient light affect the accuracy of pulse oximetry? Respir Care. 2003;48:677.