Episode two frames procedural sedation around one trade: the depth you want versus the depth your team can rescue from. The ASA continuum sets the rescue rule, the practitioner must be able to manage a patient one level deeper than intended, and ASA physical status predicts who tolerates endoscopist-supervised moderate sedation versus who needs anesthesia. Midazolam and fentanyl carry the easy case at the cost of multiplicative respiratory depression; propofol buys fast onset and offset for the complex case at the cost of no antagonist. The alternative agents each solve one problem the standard pair cannot. Topics covered The intended-versus-rescuable depth trade ASA sedation continuum and the rescue rule ASA physical status classification Midazolam plus fentanyl pharmacology and dosing Multiplicative benzodiazepine-opioid respiratory depression Propofol kinetics and staffing implications Etomidate, ketamine, and dexmedetomidine Key decisions Qualify to rescue one level deeper than the intended target, because a moderate-sedation plan reliably drifts into deep sedation in a subset of patients. Carry ASA class one and two patients with endoscopist-supervised midazolam and fentanyl for routine EGD and colonoscopy, and involve anesthesia for class three and above. Titrate midazolam in one milligram increments (0.5 to 2 mg initial) every two to five minutes and fentanyl in twenty-five to fifty microgram increments, waiting for peak effect at three to five minutes before redosing. Choose propofol for long, complex, ASA three-plus, or high-aspiration-risk cases, with airway-trained personnel immediately available because it has no antagonist and produces predictable apnea. Pick etomidate (0.1 to 0.2 mg/kg) for the hemodynamically unstable patient such as active hemorrhage with severe aortic stenosis, accepting six to twenty-four hours of adrenal suppression and avoiding it in sepsis. Reach for ketamine when propofol-induced apnea is unacceptable or IV access is absent, and for dexmedetomidine when airway maintenance is critical in severe OSA or achalasia. For the full chapter with MCQs, tables, and primary-guideline references, visit www.boardpearls.com. Questions or feedback: [email protected].

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“What did the council decide on item 42?” — answered with the speaker and the moment.

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