Colonoscopy

The classic exam item makes you classify colonoscopy as secondary prevention (early detection in an asymptomatic person), not primary—and watch for the trap where polyp removal during the same scope tempts you toward a “treatment” answer; screening is still the intent, so the level stays secondary. Other high-yield stems hinge on bowel-prep teaching: adequate prep is signaled by clear, watery, often yellow-tinged effluent (the patient should still finish the entire solution), and a frequently correct answer is to hold iron and certain anticoagulants beforehand per provider order, taking only approved routine meds with a small sip of water. Post-procedure, the most urgent finding to report is a firm, distended abdomen with severe pain or significant rectal bleeding, signaling perforation or hemorrhage—prioritize this over expected, self-limiting flatus from air insufflation.

Do not confuse a fecal occult blood/FIT test (also secondary prevention, but repeated yearly) with colonoscopy’s longer interval; a positive FIT is an indication for a follow-up colonoscopy. Memory hook: “see it, snip it, still a screen.”