Integrating Endohepatology into Clinical Practice

Integrating Endohepatology into Clinical Practice

Summary of Lecture by Dr. Rajesh Puri, MD, DNB

*Vice Chairman, Institute of Digestive and Hepatobiliary Sciences, Medanta The Medicity, Gurugram | Secretary General, SGEI*

1. Main Clinical Topics Discussed

• Endohepatology: The integration of endoscopy—specifically endoscopic ultrasound (EUS)—into hepatology clinical practice
• EUS-guided liver biopsy: Technique, safety, efficacy, and patient selection
• EUS-guided portal pressure gradient measurement (introduced at lecture's end)
• Evolving role of EUS in managing complications of portal hypertension (gastric varices, elastography, contrast EUS)

2. Key Learning Points, Guidelines, and Recommendations

Definition and Scope of Endohepatology

• Traditional endohepatology (pre-2010s): Upper GI endoscopy for variceal surveillance and treatment (band ligation, sclerotherapy, glue injection)
• Modern endohepatology (last decade): Paradigm shift toward EUS-guided procedures:

- EUS-guided liver biopsy

- EUS-guided coil and glue for gastric varices

- EUS elastography

- Contrast-enhanced EUS for hepatic lesions

- EUS-guided portal pressure measurement

- EUS-guided paracentesis and peritoneal/hepatic FNA for metastatic disease

Core Principle

• EUS-guided techniques are complementary to, not competitive with, conventional percutaneous and transjugular approaches
• A new modality should satisfy three criteria before adoption: safety, clinical effectiveness, and demonstrable benefit over traditional approaches

EUS-Guided Liver Biopsy — Patient Selection

Indications:

• Patients already requiring upper GI endoscopy or EUS (combined procedure increases cost-effectiveness)
• Anxious patients with poor breath-holding ability (sedation can be administered)
• Obese patients
• Patients with mild ascites
• Cases requiring bilobar sampling (e.g., fatty liver disease, pre-transplant evaluation)
• Patients undergoing EUS for fundal varices (coil/glue therapy can be combined)

Contraindications:

• Platelet count < 50,000
• Coagulopathy / INR > 1.5–2.0
• Significant ascites

Technical Recommendations for EUS-Guided Liver Biopsy

• Preferred needle: 19G FNB needle with Franseen (crown-tip) design — superior to forward bevel, reverse bevel, and Menghini-style needles
• Needle gauge hierarchy: 19G FNB > 22G FNB > 25G FNB
• Biopsy type: FNB needles superior to FNA needles
• Suction technique: Wet heparin suction (needle flushed with 1:1,000 diluted heparin saline, ~2 cc) superior to dry suction or no suction
• Technique: One pass with three actuations (fanning technique) superior to three separate passes
• Always apply Doppler prior to and during needle withdrawal to avoid vascular injury
• Blood patch technique: If Doppler signals persist after needle placement, hold needle for 30 seconds; inject small amount of material into tract upon withdrawal to tamponade bleeding risk
• Tissue handling: Flush with saline (not stylet reinsertion) to avoid tissue fragmentation; macrodissection in petri dish; fix in 10% formalin
• Communicate with pathologist regarding 19G vs. conventional 16G core differences

3. Specific Clinical Data, Statistics, and Study Results Cited

Historical Milestones

• First percutaneous liver biopsy: 1883
• First ultrasound-guided liver biopsy: 1956

EUS-Guided Liver Biopsy — Safety and Adequacy Data

• Multicenter safety study using 19G FNA needle:

- Median tissue length: 38 mm (AASLD minimum requirement