Approximately 5% of patients with gastrointestinal bleeding have normal upper endoscopies and colonoscopies. 75% of these patients have bleeding from the small intestine. The remaining 25% are within reach of upper endoscopy or of a total colonoscopy, but their bleeding was not detected in initial studies 27, 28.
Aproximadamente 5% de pacientes con sangrado gastrointestinal tiene endoscopia alta y colonoscopia normal, 75% tiene sangrado proveniente de intestino delgado y el 25% restante, está al alcance de una endoscopia alta o de una colonoscopia total, pero no se detectan en los estudios iniciales 27, 28.