| 摘要 |
A device includes a rotor having a proximal end, a distal end, and a body extending between the proximal and distal ends, wherein the rotor has an opening extending from the proximal end, the rotor being rotatable about an axis that extends through the opening, and wherein the rotor has a port with a port axis that forms an angle relative to the axis, the angle having a value that is larger than zero and less than 180°.
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