| 摘要 |
The invention relates to a medical insertion aid for surgical instruments and/or optical systems having a shaft (1), which forms an insertion duct (6) and on the inner wall of which at least one groove (14) is formed, which runs in the duct longitudinal direction or is longitudinally oriented. The invention further or alternatively relates to a medical insertion aid which has in the distal end section thereof (axial middle section preferably in the distal end region) a fluid flow blocking edge, which extends radially outwards and preferably runs around in a closed manner. This further preferably forms at least one circular channel or groove which opens axially, the opening direction being distal and/or proximal. |
