What is the major risk associated with upper GI endoscopy under sedation, and how is it mitigated?

• A. Bleeding or perforation; mitigated by sedation choice.
• B. Allergic reaction to sedation; mitigated by premedication.
• C. Cardiac arrhythmia; mitigated by electrolyte correction.
• D. Respiratory depression or airway compromise; mitigated by monitoring, suction and oxygen ready, and staff trained in airway management.

Answer: (D)

During a sedated upper GI endoscopy, the main safety concern is respiratory depression or airway compromise. Sedatives can blunt the drive to breathe and relax the throat muscles, while the endoscope can further narrow the airway, increasing the risk of hypoventilation or obstruction. This risk is best mitigated by continuous monitoring (including capnography to detect rising CO2 early and alert to ventilation problems), having suction readily available to clear secretions or vomit, providing supplemental oxygen, and ensuring staff trained in airway management are ready to intervene immediately if breathing becomes inadequate. Additional measures like careful choice of sedation level and having a clear plan for escalation contribute to keeping the airway secure throughout the procedure.