A Medical pump for conveying a liquid and a method of operating the medical pump is provided. The medical pump comprises a chamber further comprising an inlet and an outlet. The medical pump further comprises a first and a second plunger element which are movably arranged in the chamber, the first and the second plunger element being movable with respect to one another to define a chamber space. The chamber space is displaceable within the chamber by a movement of the first and the second plunger element. The medical pump is operable and configured such that when the chamber space is fluidly connected to the inlet, liquid is moved into the chamber space through the inlet, and when liquid is arranged in the chamber space and the chamber space is fluidly connected to the outlet, the liquid is removed from the medical pump through the outlet.
