Section 10: Introduction And System Description; System Overview; System Block Diagram - Mallinckrodt NELLCOR NPB-4000 Service Manual

SECTION 10: INTRODUCTION AND SYSTEM DESCRIPTION

10. INTRODUCTION AND SYSTEM DESCRIPTION

10.1 SYSTEM OVERVIEW

10.1.1 The Complete NPB-4000/C Patient Monitor System

10.2 SYSTEM BLOCK DIAGRAM

10.1 System Overview
10.2 System Block Diagram
10.3 ECG Processing
10.4 Respiration Processing
10.5 NIBP Processing
10.6 SpO Processing
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10.7 Temperature Processing
The NPB-4000/C patient monitor is a full-function monitor for use on adult and
pediatric patients. The functions performed by the system include monitoring
patient ECG, heart rate, respiration rate, blood pressures, blood oxygen
saturation, and temperature.
In addition to monitoring and displaying the status of these physiological
parameters, the instrument performs various microprocessor-programmed
analytical functions, such as:
• Creating both visual and audible alarm signals when settable limits are
violated;
• Creating and displaying warning messages when conditions are detected
that would degrade or prevent valid measurements;
• Creating and displaying trend waveforms or tabular data;
• Providing a synchronizing pulse for defibrillator operation;
• Providing input to an optional recorder for printout of current or trend
waveforms or tabular data.
The monitor is essentially a battery-powered instrument. An internal charging
unit is designed to accept either an AC line voltage or DC source input voltage.
The charger uses these external power sources to maintain a "float" voltage
source available from the batteries.
The NPB-4000/C patient monitor functions are represented graphically in the
System Block Diagram, Figure 10-1.
Each section of the System Block Diagram is described briefly in the text that
follows the illustration. This is followed by more detailed descriptions of the
theory of operation of each block.
10-1