EUS-guided GJ in acute pancreatitis related Gastric Outlet obstruction

Endoscopic Ultrasound-Guided Gastrojejunostomy (EUS-GJ) is an innovative, minimally invasive procedure that has gained traction as a treatment for gastric outlet obstruction (GOO) due to duodenal stenosis caused by acute pancreatitis. Acute pancreatitis can lead to inflammation and scarring in the duodenum, resulting in mechanical obstruction that prevents food passage from the stomach to the intestines. EUS-GJ offers a safe and effective alternative to traditional surgery for managing this condition. Below is a detailed explanation of why EUS-GJ is required and the technical challenges associated with the procedure:

### **Why EUS-GJ is Required**

1. **Minimally Invasive Alternative to Surgery**:

• Traditional surgical gastrojejunostomy involves open or laparoscopic surgery, which can be associated with significant morbidity, longer recovery times, and increased risks in patients with acute pancreatitis. EUS-GJ provides a less invasive option that reduces these risks while achieving similar outcomes.

2. **Bypassing the Obstructed Duodenum**:

• Acute pancreatitis-related duodenal stenosis can lead to severe symptoms such as nausea, vomiting, and an inability to tolerate oral intake. EUS-GJ bypasses the obstructed duodenum by creating a direct connection between the stomach and the jejunum (a part of the small intestine), restoring gastrointestinal continuity and allowing food passage.

3. **High Success Rates**:

• The study reported a technical success rate of 92.3% and clinical success rate of 87.2%, demonstrating the effectiveness of EUS-GJ in relieving symptoms of GOO and improving oral intake.

4. **Durability and Long-Term Relief**:

• Among patients with long-term follow-up (median 23 months), EUS-GJ showed good durability, with only a small number requiring reintervention. This makes it a reliable option for managing chronic GOO caused by acute pancreatitis.

5. **Low Complication Rates**:

• Compared to surgical alternatives, EUS-GJ has a low rate of adverse events. In the study, only one significant complication (a gastrocolic fistula) was reported, and it did not lead to major clinical issues.

### **Technical Difficulties in EUS-GJ**

EUS-GJ is a technically complex procedure that requires expertise in advanced endoscopy and familiarity with the use of lumen-apposing metal stents (LAMS). Some of the key technical challenges include:

1. **Anatomical Limitations**:

• In some patients, the distance between the stomach and the small bowel may be too great, making it difficult to deploy the stent effectively. This was a limitation in three patients in the study, leading to procedural failure.

2. **Safe Puncture Window**:

• The procedure relies on identifying a safe puncture site between the stomach and jejunum using endoscopic ultrasound. In cases where the anatomy does not allow for a clear puncture window, the procedure cannot be performed.

3. **Stent Deployment**:

• Precise deployment of the lumen-apposing metal stent is critical for the success of the procedure. Misplacement or migration of the stent can lead to complications such as leakage, infection, or fistula formation.

4. **Risk of Adverse Events**:

• Although the overall rate of complications is low, potential risks include bleeding, perforation, stent migration, or the formation of abnormal connections (e.g., gastrocolic fistula). These complications require careful monitoring and management.

5. **Need for Reintervention**:

• In some cases, patients may require reintervention due to stent-related issues or recurrence of symptoms. The study reported that four patients needed reintervention during follow-up.

6. **Learning Curve**:

• EUS-GJ requires advanced technical skills and experience with endoscopic ultrasound and stent placement. The procedure may be challenging for less experienced endoscopists, limiting its availability in some centers.

### **Conclusion**

EUS-GJ is a groundbreaking procedure for managing gastric outlet obstruction caused by acute pancreatitis. It offers a safe, effective, and durable alternative to surgery, with high success rates and low complication rates. However, its technical complexity and anatomical limitations highlight the importance of careful patient selection and the need for skilled operators. As the procedure becomes more widely adopted, ongoing research and training will be critical to further improving outcomes and expanding its accessibility.