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Jejunoscopy: Small Bowel Endoscopy Explained

Jejunoscopy is an endoscopic procedure used to examine the jejunum, the middle section of the small intestine. It helps diagnose and treat conditions affecting this hard-to-reach part of the digestive tract.

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Things worth knowing about "Jejunoscopy"

Jejunoscopy is an endoscopic procedure used to examine the jejunum, the middle section of the small intestine. It helps diagnose and treat conditions affecting this hard-to-reach part of the digestive tract.

What is Jejunoscopy?

Jejunoscopy is a specialized endoscopic examination of the jejunum, which is the middle portion of the small intestine located between the duodenum and the ileum. The jejunum measures approximately 2 to 2.5 meters in length and plays a key role in the absorption of nutrients such as carbohydrates, proteins, and fats. Because the jejunum cannot be reached with standard upper or lower gastrointestinal endoscopy, specialized instruments and techniques are required to visualize this area of the digestive tract.

Indications

Jejunoscopy is performed when diseases or abnormalities in the middle small intestine are suspected or confirmed. Common indications include:

Obscure gastrointestinal bleeding that could not be identified by standard endoscopy
Suspected or known Crohn disease affecting the small bowel
Evaluation of malabsorption syndromes, such as celiac disease
Detection and removal of small bowel polyps or tumors
Assessment of small bowel strictures (narrowings)
Collection of tissue biopsies for histological analysis
Follow-up after surgical procedures involving the small intestine

How is Jejunoscopy Performed?

Jejunoscopy is typically performed under sedation or general anesthesia to ensure patient comfort. Several techniques are available depending on the clinical situation:

Push Enteroscopy

In push enteroscopy, a long, flexible endoscope (enteroscope) is advanced through the mouth, past the stomach, and into the proximal jejunum. This technique allows visualization and intervention in the upper portion of the jejunum, but the depth of insertion is limited.

Double-Balloon Enteroscopy

Double-balloon enteroscopy is an advanced technique that uses two inflatable balloons -- one attached to the endoscope and one to an outer overtube. By alternately inflating and deflating the balloons, the small intestine is pleated over the endoscope, allowing deep access into the jejunum and beyond.

Single-Balloon Enteroscopy

Single-balloon enteroscopy uses only one balloon attached to the overtube. It is technically simpler than the double-balloon method while still allowing deep insertion into the small intestine.

Capsule Endoscopy as a Complement

Capsule endoscopy, in which the patient swallows a small camera pill, is not technically a jejunoscopy but is frequently used as a complementary diagnostic tool. It provides images of the entire small intestine but does not allow tissue sampling or therapeutic interventions.

Preparation

Adequate preparation is essential before jejunoscopy:

The patient must fast for at least 6 to 8 hours before the procedure.
Depending on whether the procedure is performed via oral or anal access, a bowel preparation with laxatives may be required.
Blood-thinning medications may need to be paused before the procedure, in consultation with the treating physician.
An informed consent discussion should take place prior to the examination.

Risks and Complications

Jejunoscopy is generally considered a safe procedure, but as with all endoscopic interventions, complications can occur:

Bleeding, particularly after biopsies or therapeutic procedures
Intestinal perforation (a tear in the bowel wall, very rare)
Reactions to sedation or anesthesia
Aspiration pneumonia (very rare)
Temporary bloating or abdominal discomfort after the procedure

Recovery

After jejunoscopy, the patient is monitored in a recovery area until the effects of sedation have fully worn off. Mild bloating or a sensation of pressure in the abdomen is normal and typically resolves within a few hours. The physician will discuss the findings of the examination and any further diagnostic or therapeutic steps that may be required.

References

Yamamoto H. et al. - Double-balloon endoscopy: New technique for enteroscopy. Gastrointestinal Endoscopy, 2004.
Lenz P., Domagk D. - Double- vs. single-balloon vs. spiral enteroscopy. Best Practice and Research Clinical Gastroenterology, 2012.
American Society for Gastrointestinal Endoscopy (ASGE) - The role of endoscopy in the management of obscure gastrointestinal bleeding. Gastrointestinal Endoscopy, 2017.

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