Identifying Predictors of Airway Complications During Conscious Sedation Procedures.

Conscious sedation procedures are complicated by unanticipated airway compromise and obstruction. The STOP-Bang questionnaire (University of Toronto, 2012) is a validated obstructive sleep apnea screening questionnaire used as a preprocedure evaluation tool to assess a patient's risk for obstructive sleep apnea. The purpose of this study was to determine whether risk factors for obstructive sleep apnea, using the STOP-Bang questionnaire, could predict procedural airway complications in 152 endoscopy patients following conscious sedation. Logistic regression analysis revealed that a STOP-Bang score of greater than 5 (high risk) predicted a 10% change in heart rate (p = .021), apnea (p = .038), and arousal-relieved airway obstruction (p = .023). Every point of increase in body mass index predicted a 10% change in heart rate (p = .046), a drop in oxygen saturation (p = .002), apnea (p = .003), and 1.212 times the odds of requiring arousal-relieved airway obstruction (p = .002). An intermediate-risk STOP-Bang score (3-4) positively correlated to abnormal carbon dioxide values during the procedure (p = .015). These findings concur with existing literature on the topic and translate to clinical considerations of procedural monitoring protocols for patients with a high probability for airway complications during conscious sedation.