GI Blog

Performance Characteristics, Complications and Prevention of Small Bowel Capsule Endoscopy

17 February 2023

Ⅰ. Performance characteristics of small bowel capsule endoscopy

1. Definition of small bowel capsule endoscopy

The small intestine capsule endoscope is a disposable capsule-shaped wireless inspection tool. It moves forward with the help of gastrointestinal motility and automatically captures the intestinal mucosa. The captured images are transmitted to the data recorder worn by the patient through wireless transmission.

The small intestine capsule endoscopy system is mainly composed of a capsule endoscope, a sensing system with a data recorder, and a computer workstation for image viewing and analysis.

2. Small bowel capsule endoscopy commonly used in clinical practice

The commonly used small bowel capsule endoscopes mainly include PillCam, Miro-Cam, OMOM, NaviCam, Endocapsule and other series. Studies have shown that the batterylife of the above capsule endoscopes is all > 8 hours, the shooting angle of view is all > 140°, and the shooting frequency is all > 2 frames. /s, some capsule endoscopes can automatically adjust the shooting frequency according to the speed of intestinal peristalsis.

Capsule endoscopy directly stores the captured images on the microchip inside the capsule. The capsule must be collected after the patient's feces are discharged, and then data analysis is performed.

Ⅱ. Complications and prevention of small bowel capsule endoscopy

1. After small intestinal capsule endoscopy, it should be determined whether the capsule is excreted to prevent the occurrence of asymptomatic capsule retention. To remove the capsules retained in the small intestine, an instrument-assisted enteroscopy is recommended. When there is clinical indication for surgery or when the capsule is not successfully removed by endoscopy, the capsule can be removed by surgery or the underlying disease can be treated.

2. For patients with suspected or definite non-obstructive dysphagia, it is recommended to use a traditional gastroscope to insert the capsule into the duodenum to prevent the capsule from being inhaled into the trachea by mistake.

3. Before small bowel capsule endoscopy, the patient's medical history should be fully collected, such as previous abdominal surgery history and obstructive symptoms.

Ⅲ. Format specification for writing small bowel capsule endoscopy reports

1. It is recommended to use a structured and standardized small bowel capsule endoscopy report writing format.

2. It is recommended to use standardized scores such as Lewis score or Crohn's disease activity index to describe the lesion characteristics under capsule endoscopy, and use parameters such as capsule transit time, small intestinal mucosal characteristics, and small intestinal peristalsis characteristics to infer the lesion location.