Match each patient presentation of gastrointestinal bleeding or anemia with the most appropriate next step in diagnostic workup.
- A 61-year-old man with persistent symptomatic iron deficiency anemia. Recent upper endoscopy and colonoscopy were both unremarkable.Video capsule endoscopy
- A 54-year-old man with massive, painless hematochezia and hemodynamic instability. Upper endoscopy showed no active bleeding, but brisk hematochezia continues.Abdominal and pelvic CT angiography
- A 73-year-old man presenting for routine follow-up after a positive fecal immunochemical test (FIT) obtained during annual health maintenance.Colonoscopy
- A 39-year-old woman describing sharp anal pain and bright red blood noted exclusively on tissue paper after bowel movements.Anoscopy
Cevap
The clinical scenarios should be matched based on the established algorithms for localizing gastrointestinal bleeding: obscure bleeding warrants small bowel evaluation, massive unstable bleeding requires rapid angiographic localization, positive noninvasive screening mandates full colonic evaluation, and classic anorectal symptoms allow for targeted distal visualization.
Each diagnostic modality has a specific role in the gastrointestinal bleeding algorithm based on chronicity, rate of bleeding, and prior test results. Capsule endoscopy evaluates the small bowel for obscure bleeding. CT angiography localizes rapid, active bleeding in unstable patients. Colonoscopy is the gold standard for routine occult bleeding workup. Anoscopy provides targeted evaluation for distal anorectal pathology.
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Anahtar Kavram
Diagnostic algorithms for gastrointestinal bleeding are dictated by hemodynamic stability, bleeding rate, and prior endoscopic findings.