| 摘要 |
An improved system for displaying annotated physiological signals processes the signals for two dimensional display on an oscilloscope, for annotation with time-of-day and patient information, and for marking relative to a plurality of detected, abnormal physiological events. The physiological signal is traced during a first time interval after which the time-of-day and patient information is annotated appropriately on the display during a second time interval. During a third time interval, the display is marked to identify those physiological events which have been detected by the system as being abnormal. The display is created with maximum fidelity and without loss of signal information by this three pass process. Two independent channels of physiological signals are displayed on alternate horizontal lines in the display, again without loss of signal fidelity, by tracing the first channel during a first sweep and simultaneously storing the second channel within a memory for display during a second sweep. Display is made in any one of a plurality of display formats in one of a plurality of operational modes through the use of program counters which step through various memories devoted to storage of the physiological signals, of the annotations and of the abnormality markers to generate a coordinated display in the three pass process. X-sweep and y-sweep signals are generated for the oscilloscope with ease by generating a binary word encoded to correspond to the selected display format, which binary word is coupled to the input of a digital-to-analog convertor. The output of the digital-to-analog convertor is a current which is proportional to the magnitude of the binary word, which output is used as the input to a sawtooth generator and which in turn generates the appropriate x-sweep or y-sweep signal.
|
