Apparatus for the non-invasive measurement of the blood flow through a shunt of a patient, comprising: a bandage which can be worn by the patient, as well as a plurality of sensors which are arranged in or at the bandage, which are configured to detect a stretching of the skin, one or more ECG sensors arranged in or on the bandage for detecting an electrocardiogram, a memory, in which reference data for the values detectable by means of the sensors stored are stored, wherein the reference data is present as a two or multidimensional pattern, and an evaluation unit for evaluating the values detected by the sensors, wherein the sensors are arranged in a two-dimensional matrix and are configured such that they establish a space/time pattern of the spatial, two-dimensional or three-dimensional stretching of the skin surface on top the shunt, wherein a vascular dilatation oscillating with the blood flow is always detected together with or after occurrence of the R wave of the electrocardiogram measured by means of the ECG sensor, and wherein the space/time pattern is a two-dimensional or three-dimensional pattern that simultaneously reflects the measured values of the sensors, and the sensors output a value, which is representative of the deviation of the measured value to one or multiple threshold values, the evaluation unit is configured to compare the values detected by the sensors to the reference data and bases on this comparison, to output a signal or information, wherein a transmission unit which is in communication with the evaluation unit and is configured such that it transmits the result of the evaluation carried out in the evaluation unit wirelessly to a receiver, wherein the apparatus further comprises: movement and/or acceleration sensors, which contribute to suppressing artifacts of movements and measured signals due to muscle flexing. a bandage which can be worn by the patient, as well as a plurality of sensors which are arranged in or at the bandage, which are configured to detect a stretching of the skin, one or more ECG sensors arranged in or on the bandage for detecting an electrocardiogram, a memory, in which reference data for the values detectable by means of the sensors stored are stored, wherein the reference data is present as a two or multidimensional pattern, and an evaluation unit for evaluating the values detected by the sensors, wherein the sensors are arranged in a two-dimensional matrix and are configured such that they establish a space/time pattern of the spatial, two-dimensional or three-dimensional stretching of the skin surface on top the shunt, wherein a vascular dilatation oscillating with the blood flow is always detected together with or after occurrence of the R wave of the electrocardiogram measured by means of the ECG sensor, and wherein the space/time pattern is a two-dimensional or three-dimensional pattern that simultaneously reflects the measured values of the sensors, and the sensors output a value, which is representative of the deviation of the measured value to one or multiple threshold values, the evaluation unit is configured to compare the values detected by the sensors to the reference data and bases on this comparison, to output a signal or information, wherein a transmission unit which is in communication with the evaluation unit and is configured such that it transmits the result of the evaluation carried out in the evaluation unit wirelessly to a receiver, wherein the apparatus further comprises: movement and/or acceleration sensors, which contribute to suppressing artifacts of movements and measured signals due to muscle flexing.