2-2
2.1.1 Parameter Measurement
The parameter measurement and monitoring are the core functions of the patient monitor. The
parameter measurement part of the DPM4 patient monitor consists of the measurement probe,
parameter input socket assembly, NIBP assembly and the main control board.
This part converts the physiological signals to electrical signals, processes those signals and
conducts the calculation by the preset program or command delivered from the main control
board, and then sends the values, waveforms and alarm information (which will be displayed by
using the man-machine interface) to the main control board.
2.1.2 Main Control Part
In the DPM4 patient monitor, the main control part refers to the main control part of the main
control board. It drives the man-machine interface, manages the parameter measurement and
provides users with other special functions, such as storage, recall of waveforms and data. (See
Figure 2-1)
2.1.3 Man-Machine Interface
The man-machine interface of the DPM4 patient monitor includes the TFT display, recorder,
speaker, indicator, buttons and control knob.
The TFT display is the main output interface. It, with the high resolution, provides users with
abundant real-time and history data and waveforms as well as various information and alarm
information.
The recorder is a subsidiary of the display, which is used for the user to print data.
The speaker provides the auditory alarm function.
The indicator provides additional information about the power supply, batteries, alarms and so
on.
The buttons and control knob are the input interface, which are used for the user to input the
information and commands to the patient monitor.
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