Figure 5-17 Mistake-Proofing the Design of Health Care Processes - Figure 5.17. Esophageal intubation detector bulb When inflated fully, this bulb indicates that the intubation tube has been successfully inserted into the trachea.Return to Document Current as of May 2007 Internet Citation: Figure 5-17: Mistake-Proofing the Design of Health Care Processes -. May 2007. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/professionals/quality-patient-safety/patient-safety-resources/resources/mistakeproof/mistakefig5-17.html