3.2 Advanced Procedures (ERCP, EUS, Enteroscopy, Capsule)

Why Advanced Procedures Are Heavily Weighted

Advanced endoscopy carries higher complication rates than diagnostic endoscopy, so the CGRN exam emphasizes the nurse's role in preparation, intra-procedure support, radiation safety, and early complication recognition. These cases are longer, frequently require deep sedation or anesthesia support, and use specialized equipment the nurse must set up and troubleshoot.

ERCP — Endoscopic Retrograde Cholangiopancreatography

ERCP uses a side-viewing duodenoscope plus fluoroscopy and iodinated contrast to image and treat the biliary and pancreatic ducts via the major papilla. Modern ERCP is overwhelmingly therapeutic, not diagnostic, because magnetic resonance cholangiopancreatography (MRCP) and EUS have replaced purely diagnostic ERCP.

Common indications: choledocholithiasis (bile-duct stones), biliary obstruction or stricture, malignant or benign biliary drainage, bile-duct leak repair, and selected pancreatic-duct disease.

Key equipment and accessories: side-viewing duodenoscope with an elevator mechanism, fluoroscopy unit, contrast media, guidewires, sphincterotome (papillotome), extraction balloons and stone baskets, biliary/pancreatic stents, mechanical lithotripter, and an electrosurgical generator.

Sphincterotomy and Stent Placement

• Biliary sphincterotomy cuts the sphincter of Oddi with electrosurgical current to enlarge the ampullary opening for stone extraction or stenting; it carries bleeding and perforation risk.
• Stent placement (plastic or self-expanding metal) relieves obstruction; nursing follow-up watches for occlusion (recurrent jaundice, fever, cholangitis) and migration (lost relief, abdominal pain).
• Post-ERCP pancreatitis is the most common serious complication, occurring in roughly 3-10% of cases (higher in young women, sphincter-of-Oddi dysfunction, difficult cannulation, and pancreatic-duct injection). Monitor for new or worsening epigastric pain radiating to the back, nausea/vomiting, and elevated lipase/amylase. Rectal indomethacin is often given for prophylaxis in high-risk patients. Other risks: hemorrhage, perforation, cholangitis, and sedation events.

Radiation and Fluoroscopy Safety

Because ERCP uses ionizing radiation, the nurse applies the ALARA principle — "as low as reasonably achievable."

Pregnant staff follow facility radiation-safety policy with additional shielding, a fetal dosimeter, and lower dose limits.

Duodenoscope Reprocessing (High-Yield Safety)

Duodenoscopes have an elevator channel that is difficult to clean, and the FDA has linked inadequate reprocessing to clusters of multidrug-resistant organism infections. The nurse must follow the manufacturer's instructions for use exactly: pre-clean at the bedside, leak-test, manually clean all channels and the elevator, then high-level disinfect or sterilize. Single-use disposable-tip or fully disposable duodenoscopes are increasingly used to eliminate this risk.

EUS — Endoscopic Ultrasound

EUS mounts a high-frequency ultrasound transducer on the endoscope tip to image GI wall layers and adjacent structures (pancreas, bile duct, mediastinum, lymph nodes). EUS supports tumor staging (T and N staging) and EUS-guided fine-needle aspiration (FNA) or core biopsy. The nurse assists with needle preparation and priming, applies suction, hands specimens to cytology for rapid on-site evaluation (ROSE) when available, and monitors for bleeding and pancreatitis.

Deep Enteroscopy

Device-assisted enteroscopy (single- or double-balloon, or spiral) reaches deep small bowel beyond the reach of a standard endoscope. Indications include obscure GI bleeding, small-bowel tumors, and polyp removal in polyposis syndromes. These procedures are long; nursing emphasis is on sedation duration, positioning, overtube management, and perforation watch.

Capsule Endoscopy

Capsule endoscopy is a swallowed wireless camera that images the small bowel, used mainly for obscure GI bleeding and suspected small-bowel Crohn disease.

Contraindications and cautions:

• Known or suspected GI obstruction, strictures, or fistulae — the capsule can lodge (capsule retention), the only frequent serious complication.
• Dysphagia or swallowing disorders may require endoscopic capsule placement.
• Implanted electromedical devices require following current capsule-device labeling and cardiology coordination.
• A dissolvable patency capsule can be given first when stricture risk is a concern; if it passes intact, the imaging capsule is safe.

Nursing teaching covers diet/prep, sensor-belt or electrode and recorder application, activity, and warning signs of retention (abdominal pain, distension, vomiting).

Pre- and Post-Procedure Nursing Across Advanced Cases

Because advanced procedures are longer and use deeper sedation, the nurse front-loads the pre-procedure assessment. Confirm a signed consent that names the specific intervention (for example, "ERCP with possible sphincterotomy and stent placement"), review the coagulation profile and antiplatelet/anticoagulant status (many high-bleeding-risk interventions require holding warfarin, direct oral anticoagulants, or clopidogrel per ASGE periendoscopic guidance), and verify a current type and screen when bleeding risk is high. For ERCP and EUS-FNA, confirm contrast allergy history and renal function when contrast is used.

Positioning differs by case: ERCP is classically performed prone or semi-prone over a fluoroscopy table, which raises airway and aspiration concerns, so the nurse stays alert for desaturation and secretions. EUS and enteroscopy are usually left lateral. Throughout, the nurse documents fluoroscopy time, contrast volume, and devices/stents deployed for the procedure and billing record.

Post-procedure, escalate any of the following to the physician immediately:

• Severe or worsening abdominal pain, rigidity, or distension (perforation or pancreatitis).
• Fever, rigors, or worsening jaundice after biliary instrumentation (cholangitis or stent occlusion).
• Hematemesis, melena, or a falling hemoglobin (post-sphincterotomy bleeding, which can be delayed up to two weeks).
• Subcutaneous emphysema or chest pain after esophageal instrumentation.

Discharge teaching for outpatients stresses the same red flags, a soft diet progression as ordered, and the requirement for a responsible adult to drive and observe the patient because of residual sedation.