Capsule endoscopy overview

Capsule endoscopy is a non-invasive medical device used for gastrointestinal examination. It is shaped like a capsule and has a built-in miniature camera and wireless transmission module. After the patient swallows it, the capsule takes images along with the peristalsis of the digestive tract and transmits them to an external recorder. Doctors analyze the images to diagnose the disease. It is mainly suitable for examination of the small intestine. It has the advantages of being painless, without anesthesia, and can observe the entire digestive tract. However, it has limitations such as high cost and the inability to perform biopsy. The content structure is divided into: 1) definition and principles; 2) applicable scenarios and advantages; 3) limitations and precautions; 4) mainstream products and manufacturers.

Definition and working principle

The capsule endoscope consists of a shell, camera, light source, battery and transmitter, with a diameter of about 11-26 mm and a weight of less than 4 grams. After swallowing, the capsule takes images of the mucosa of the digestive tract at a rate of 2-35 frames per second and transmits them to a receiver on the waist via radio. The inspection process takes about 8-12 hours, and the capsule is eventually excreted with the feces. This technology was first launched by the Israeli company Given Imaging in 2001 (product name PillCam), and has now become the "gold standard" for the diagnosis of small intestinal diseases.

Applicable scenarios and core advantages

Capsule endoscopy is mainly used to detect small intestinal bleeding, Crohn's disease, tumors and other lesions that are difficult to reach with traditional endoscopy. Its significant advantages include: 1) Non-invasive, avoiding the discomfort of traditional endoscopy; 2) The entire small intestine can be observed, increasing the detection rate by 30%-40%; 3) No hospitalization is required, and patients can move freely. According to statistics from the "Chinese Journal of Digestive Endoscopy", its diagnostic accuracy for unexplained gastrointestinal bleeding reaches over 70%. However, it should be noted that it is contraindicated in patients with intestinal obstruction or stenosis.

Limitations and Notes

The limitations of capsule endoscopy include: 1) The direction of movement cannot be controlled and lesions may be missed; 2) Biopsy or treatment cannot be performed; 3) The battery life is limited and the entire shooting may not be completed. You need to fast for 12 hours before the examination and take laxatives to cleanse the intestines. In addition, the price is relatively high (about 3,000-5,000 yuan/time), and some are not covered by medical insurance. Doctors usually recommend comprehensive evaluation combined with CT or traditional endoscopy.

Mainstream product and manufacturer information

The global capsule endoscopy market is mainly occupied by the following manufacturers:

Domestic manufacturers such as Chongqing Jinshan Technology have also launched OMOM capsule endoscopes, which cost 20%-30% lower than imported products.

Summary and Outlook

Capsule endoscopy has revolutionized the examination of the digestive tract and is irreplaceable especially in the diagnosis of small intestinal diseases. With the development of AI image analysis, magnetic navigation and other technologies, precise positioning and real-time treatment may be achieved in the future. However, cost and popularity need to be balanced, and doctor-patient communication needs to be strengthened to ensure rational use.

Citing sources

1. "Chinese Journal of Digestive Endoscopy" 2022 "Clinical Application Guidelines for Capsule Endoscopy"
2. Official website of Israel’s Given Imaging Company (now part of Medtronic)
3. Anhan Technology Navicam Product Manual
4. Chongqing Jinshan Technology OMOM Capsule Endoscopy Technology White Paper