| 摘要 |
A medical resection device (100) that includes an outer tube assembly (103) that includes a straight outer tube (102), an inner tube assembly (104) that includes a straight inner tube (110) disposed within the outer tube, and at least one interference member on the outer tube assembly and at least one interference member on the inner tube assembly. The inner tube and the outer tube are configured to rotate relative to each other to resect tissue at a distal end of the inner and outer tubes. The interference members are configured to prevent a force exerted along a longitudinal axis of the inner tube from separating the inner and outer tubes without rendering the medical device unusable. The medical resection device can include a burr on the inner tube, or a first cutting surface on the outer tube and a second cutting surface on the inner tube. Exemplary interference members can be various combinations of a groove, a pin, a ring, a ridge, a snap mechanism, step features, and others. |
