| 摘要 |
An apparatus for transferring an ovum from a follicle with a double lumen needle having at the distal needle end an aspiration lumen for removing an ovum from a follicle and a flushing lumen, the double lumen needle comprising an outer tube with an internally located inner tube that extends over at least part of the length of the outer tube, one of the lumens being bounded by the inner surface of the inner tube and the other of the two lumens by the space between the outer surface of the inner tube and the inner surface of the outer tube, and a connector having an outlet at a second connector end for discharging the flushing fluid with possibly an ovum to the exterior and having a channel means that connects the outlet with the aspiration lumen and a flushing inlet for supplying the flushing fluid, wherein the two fluid pathways within the connector and the double lumen needle are separated from each other, and the inner tube comprises a deformable material. The lumen of the inner tube is the aspiration lumen and the inner tube comprises a depressible portion that is depressible under the influence of a pressure difference between the aspiration lumen and the flushing lumen and the flushing lumen is the space between the interior surface of the outer tube and the exterior surface of the depressible portion. |
