In the present invention, a biopsy brush, a cap having a step difference is formed on the upper end, and is elongated to a predetermined length to become a longitudinal axis of the brush; And a biopsy unit that is fastened to the brush tube so as to cover the brush tube, and that the brush tube is provided with a plurality of brush teeth that expand in an elliptical shape as the longitudinal external force is pressed, and the brush tube is an inner tube of a catheter. It is characterized in that as the advancing forward presses the lower end of the biopsy portion, the brush teeth are expanded into an elliptical shape, and the expanded brush teeth are rotated in the longitudinal direction to collect bacteria in the tissue.
展开▼
