A client is scheduled for an esophagogastroduodenoscopy (EGD). The nurse knows this test can be used for which three reasons? (Select All That Apply)

Esophagogastroduodenoscopy is a diagnostic and therapeutic procedure involving the peroral insertion of a fiber-optic endoscope. It allows for direct inspection of the upper gastrointestinal mucosa from the esophagus through the second portion of the duodenum. Beyond visualization, the endoscope provides a channel for surgical instruments to perform hemostatic interventions and tissue sampling under direct vision. A. Visualize the ascending colon: The ascending colon is a component of the lower gastrointestinal tract and is only accessible via colonoscopy. An EGD endoscope is anatomically limited by length and cannot bypass the small intestine to reach the large bowel. This requires a retrograde approach through the rectum. B. Visualize the beginning of the duodenum: The "D" in EGD stands for duodenum, specifically the bulb and descending segments. This allows clinicians to identify duodenal ulcers, inflammation, or structural abnormalities beyond the pyloric sphincter. It is the distal limit of a standard upper endoscopic exam. C. Coagulate sources of active bleeding: Endoscopists use specialized tools like electrocautery probes or hemoclips to treat active hemorrhage from ulcers or varices. This immediate therapeutic capability can prevent the need for invasive open surgery and stabilize hemodynamic status. It is a critical function in emergency gastrointestinal care. D. Remove polyps for biopsy: The endoscope allows for the excision of suspicious mucosal growths or small tumors using a snare or forceps. These specimens are then sent for histological analysis to differentiate between benign and malignant pathology. It provides definitive diagnostic information through direct tissue access.