Abstract
Well-established technology that provides assistance from outside the patient may soon give way to alternative approaches that by the wireless robotic mechanisms inside the patient through natural orifices. For this study, two kinds of micro biopsy mechanisms were developed for capsule endoscope which could traverse the gut environment automatically. This mobility allows the biopsy device to move to the area of interest to sample specific tissues. Based on the medical and mechanism considerations, we concerned on design precise biopsy jaw with sufficient cutting force, and the biopsy process should be safe, repeatable and visible. The lead-screw linkage system that actuated jaw of biopsy allowing for large force production. Using one micro-motor, the biopsy process was carried out quickly by three motions: stretching to sampling point; bite and cutting off; withdrawing into capsule body with the sample. With the control and vision system, the biopsy process could compete automatically. The robot was capable of traversing in the gut environment wirelessly and had been successfully used to biopsy gut tissue in vitro. In addition, experimental analysis of the biopsy mechanism showed good results towards more elaborate tissue manipulation in the future.
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Chen, WW., Yan, GZ., Liu, H. et al. Design of micro biopsy device for wireless autonomous endoscope. Int. J. Precis. Eng. Manuf. 15, 2317–2325 (2014). https://doi.org/10.1007/s12541-014-0596-2
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DOI: https://doi.org/10.1007/s12541-014-0596-2