Output device for outputting a temporal measured value profile of a medical measured value, comprising - a receiving unit which is designed to receive sensor data and signal quality data via at least one received signal and to provide them for further processing by the output device, wherein the sensor data indicate the temporal measured value profile of the medical measured value, and wherein the signal quality data indicate a temporal signal quality profile associated with the temporal measured value profile; - an output control unit which is designed to determine a diagram to be output with a measured value profile curve on the basis of the sensor data and the signal quality data and to provide it via an output signal, wherein the measured value profile curve indicates the temporal measured value profile and a profile curve spread of the measured value profile, and wherein the measured value profile curve indicates the the temporal measured value profile of the medical measured value by its position and structure within the diagram to be output, and wherein the profile curve spread associated in each case with a time of the measured value profile curve is a measure of the signal quality present at this time of the measured value profile curve in accordance with the signal quality data; and - a display unit which is designed to receive the output signal and to graphically output the diagram to be output with the measurement value profile curve and the corresponding profile curve spread on a display of the display unit, wherein the profile curve spread is shown as a corresponding spread of the temporal measured value profile. - a receiving unit which is designed to receive sensor data and signal quality data via at least one received signal and to provide them for further processing by the output device, wherein the sensor data indicate the temporal measured value profile of the medical measured value, and wherein the signal quality data indicate a temporal signal quality profile associated with the temporal measured value profile; - an output control unit which is designed to determine a diagram to be output with a measured value profile curve on the basis of the sensor data and the signal quality data and to provide it via an output signal, wherein the measured value profile curve indicates the temporal measured value profile and a profile curve spread of the measured value profile, and wherein the measured value profile curve indicates the the temporal measured value profile of the medical measured value by its position and structure within the diagram to be output, and wherein the profile curve spread associated in each case with a time of the measured value profile curve is a measure of the signal quality present at this time of the measured value profile curve in accordance with the signal quality data; and - a display unit which is designed to receive the output signal and to graphically output the diagram to be output with the measurement value profile curve and the corresponding profile curve spread on a display of the display unit, wherein the profile curve spread is shown as a corresponding spread of the temporal measured value profile.