| 摘要 |
Conventional breast pump systems use only a vacuum source as negative pressure to the breast to induce the expression of breast milk which can result in the elongation and distension of the nipple in an axial direction that is both uncomfortable and inefficient for the expression of breast milk. A breast pump according to the present invention comprises a pressure source which generates pressure during a pressure stroke the pressure source having a movable structure with a variable pressure volume or variable cycle time. In addition, the pump has a controller, operably connected to the pressure source, which regulates the pressure volume based upon a distance travelled by the movable structure or regulates the variable cycle time based upon a speed of the movable structure. The controller provides substantially real-time monitoring of the distance travelled or the speed. |
