The invention relates to an infusion system including an infusion pump (2), said infusion pump (2) comprising an input unit which is adapted for adjusting a value of at least one parameter provided for controlling the operation of the infusion pump (2) and/or an infusion process, and a display unit (8) adapted to display the value of the at least one parameter to be adjusted through the input unit, wherein the input unit comprises at least one slide bar (10) including an which is adapted to be touched by a user's finger (20a) to be moved along its length resulting in a change of the value of the parameter, wherein a movement in a first direction results in an increase of the value of the parameter and in a reversed second direction results in a decrease of the value of the parameter, and wherein the slide bar (10) is adapted so that the rate of change of the value of the parameter essentially correlates with the speed of movement of the finger (20a) and in an idle mode is decelerated in a similar way as under influence of an inertia load and/or a friction.
