By a method to measure the blood pressure of a patient, a series of measurements for the diastolic, the systolic blood pressure and for the pulse rate are made. The results are analysed in order to determine, and to display whether the patient is properly settled to a rest condition, and whether the patients blood pressure variation is found as being normal. Further it is investigated, whether there are high measurement result alterations due to artefacts. Highly altered results are excluded. If the results are sufficiently similar, an average of the result is made. If the results are not sufficiently similar, but still below pre-defined alteration limits, a weighted average is applied to the systolic and the diastolic blood pressure.