A system according to invention principles advantageously automatically displays a parameter value within the closest Flowsheet parameter acquisition time interval column. A user interface system provides patient medical parameter data for trend indicative display covering a time period comprising user selectable acquisition time intervals. The system includes an acquisition processor for acquiring, from a patient monitoring device, data representing a patient parameter comprising a plurality of data values at a corresponding plurality of different times within multiple user selectable patient parameter acquisition intervals of a time period. The data processor determines for a particular user selectable acquisition time interval a patient parameter data value closest in time to a center time point of the particular user selected acquisition time interval and excludes other patient parameter data values acquired within the particular user selectable acquisition time interval. A generator generates data representing an image showing a trend indicative display of the patient parameter including the determined patient parameter data value associated with the particular user selectable acquisition time interval and omits the excluded data values.