Beijing Daily Client | Reporter Bai Bo Correspondent Jiao Defang Li Qing
Tianjin University Song Zhibin's team recently proposed a new strategy for sampling capsule robot biopsy. The new biopsy capsule robot they developed can cut suspected lesion tissue in the colon at high speed to avoid problems such as tissue tearing in the existing biopsy method. Related achievements have been published in the new issue of "Robots and Bionic Systems" in the high starting point of the Chinese science and technology journal Excellence Action Plan.
In human digestive tract diseases, colorectal cancer is an invisible killer that directly threatens human health. colonoscopy is the "gold standard" for colorectal cancer diagnosis. It allows doctors to intuitively see the lesions in the colorectal and obtain a pathological diagnosis with biopsy. Traditional colonoscopy will bring discomfort to patients. As an endoscopy diagnostic method, capsule endoscopy can reduce the degree of discomfort of users and has broad prospects. However, currently clinically used capsule endoscopy cannot be biopsy sampling. The academic community has proposed a variety of capsule endoscopy biopsy strategies, but it is easy to cause problems such as tear and adhesion when acquiring intestinal tissue.
" capsule endoscope is also called capsule robot . It uses capsule robots to conduct examinations of gastrointestinal, esophagus and other parts, which not only provides image information, but also performs biopsy operations. is the main development direction for future gastrointestinal disease screening ." said Song Zhibin, associate professor at the School of Mechanical Engineering, Tianjin University.
Song Zhibin led the team to propose a new biopsy sampling strategy of "installing high-speed rotating blades for biopsy capsule robots", and also installed a small permanent magnet for this capsule robot that installed high-speed rotating blades, which controls its movement through an external magnetic field. The high-speed rotating blade is activated by a tightened coil spring, which can provide stronger instantaneous power than the motor or magnet of the same mass, and effectively avoid mutual interference between motion control and biopsy control. The team also designed a trigger mechanism to ensure reliable sampling. According to the verification results of ex vivo pig large intestinal biopsy sampling, it is shown that the new biopsy capsule robot can achieve multiple biopsy triggers, and when it is higher than a certain cutting speed, it can effectively avoid soft tissue tearing, which is expected to become a new means for future clinical gastrointestinal examinations.
"This research result can realize the functions of one examination and multiple biopsies, providing technical support for the future clinical application of capsule robots with biopsy functions. This will further improve the diagnosis and treatment level of gastrointestinal diseases and is also the future development direction of capsule robots." Song Zhibin said.
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