QUESTIONS 1 of 1 1 Previous Next (OBQ09.257) Which of the following is the greatest risk factor for a paradoxical embolus from a venous air embolus (VAE) when performing complex cervical spine deformity operations in the beach-chair position? QID: 3070 Type & Select Correct Answer 1 Nitrous oxide anesthesia 9% (263/2842) 2 Persistent foramen ovale (PFO) 72% (2057/2842) 3 Severe hypotension 11% (305/2842) 4 Obesity 3% (77/2842) 5 Emphysema 4% (126/2842) L 4 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 2 Review Tested Concept Review Full Topic