In a method for visualization of a parameter which is measured continuously on or in a human body, in particular a glucose concentration, the following steps are carried out. First, a measured value range for a measured parameter is subdivided into two or more sub-ranges. Trend information is then calculated relating to the future expected profile of the measured parameter on the basis of two or more measured values. A time period after which it is predicted that the measured parameter will have left its current sub-range is calculated based on current value of the measured parameter and the calculated trend information and finally the time period is displayed. On the basis of the calculation and display of a time period after which the measured parameter will have departed from one sub-range to another, it is possible for a patient to assess, even without detailed knowledge of the medical relationships, the effects of his action at a time which he can comprehend on the basis of the prognoses available to him, and if appropriate to take corrective actions. An apparatus for carrying out a method such as this comprises a measurement apparatus, a system controller with a computer having a memory unit and a display. A computer program product for carrying out a method such as this on an appropriate apparatus is likewise disclosed.
