User's Manual
Table Of Contents
- 1 Safety
- 2 General Product Description
- 3 Getting Started
- 3.1 Unpacking and Checking
- 3.2 Environmental Requirements
- 3.3 Connecting the ECG Leadwire
- 3.4 Installing the Batteries
- 3.5 Powering On the Unit
- 3.6 Understanding Touch Gestures
- 3.7 Basic Operations
- 3.7.1 Understanding the Screen Display Orientation
- 3.7.2 Browsing the Screen Display
- 3.7.3 Switching the Screen Display Orientation
- 3.7.4 Flipping the Landscape Display
- 3.7.5 Displaying the Quick Keys Area
- 3.7.6 Entering the Main Menu
- 3.7.7 Turning the Display Off
- 3.7.8 Turning the Display On
- 3.7.9 Unlocking the Screen
- 3.7.10 Acknowledging the Nurse Call
- 3.8 Using the Pouch
- 4 User Configurations
- 5 Patient Management
- 6 Alarms
- 7 Monitoring ECG
- 7.1 Introduction
- 7.2 Safety
- 7.3 Preparation for Monitoring ECG
- 7.4 Changing the ECG Settings
- 7.5 Understanding the ECG Display
- 8 Monitoring SpO2 (Optional)
- 9 Monitoring with the TD60 at the CS
- 9.1 Introduction
- 9.2 Physiological Alarms
- 9.3 ECG Monitoring
- 9.4 QT Monitoring
- 9.5 ST Monitoring
- 9.6 Arrhythmia Monitoring
- 9.7 SpO2 Monitoring
- 10 Configuring the TD60
- 10.1 Introduction
- 10.2 Maintenance Menu
- 10.2.1 Entering the Maintenance menu
- 10.2.2 Configuring the General Menu
- 10.2.3 Configuring the Alarms Menu
- 10.2.4 Quick Keys Menu
- 10.2.5 Configuring the Defaults Menu
- 10.2.6 Transferring a Configuration
- 10.2.7 Screen Lock Menu
- 10.2.8 Changing the Passwords
- 10.2.9 Changing the Device Name
- 10.2.10 Demo Mode
- 10.2.11 Service Menu
- 11 Battery
- 12 Troubleshooting
- 13 Cleaning and Disinfecting
- 14 Maintenance
- 15 Accessories
- A Product Specifications
- B EMC
- D Symbols and Abbreviations
- E Anomaly
ST Monitoring Monitoring with the TD60 at the CS
9 - 22 TMS60 Operator’s Manual
9.5 ST Monitoring
A normal ECG waveform (for ST monitoring)
The ST segment of an ECG waveform (as shown in the above figure) represents the
period from the end of ventricular de-polarization, to the beginning of ventricular re-
polarization, or the end of the QRS complex (the J point) and the beginning of the T-
wave. ST Segment analysis is used to monitor the oxygen supply and the viability of the
heart muscle.
ST deviation is the vertical distance between the isoelectric (ISO) point level and signal
level at ST point.
The ISO point is located between the end of the P-wave and the onset of the QRS com-
plex. The ISO point provides the baseline for this measurement.
The ST point is a fixed distance from the J point at the end of the QRS complex. The ST
point can be configured to 40, 60, or 80 milliseconds past the J-point, independent of
the heart rate. By default, the ST point is positioned as follows:
■ at 80 milliseconds for heart rates less than or equal to 120 beats per minute
■ at 60 milliseconds for heart rates greater than 120 beats per minute
All available ECG leads are analyzed to measure deviations in the ST segment.
Selecting leads that contain the least amount of baseline flutter will improve measure-
ment accuracy, but accurate ST deviation measurement is dependent on the correct
location of the ISO and ST points.
■ ST segment analysis calculates ST segment elevations and depressions for
individual leads and then displays them as numerics in the ST digital area.
■ A positive value indicates ST segment elevation; a negative value indicates ST
segment depression.
R
P
T
S
ST Point
J Point
ISO Point
40 to 80 msec
ST deviation
Depression or Elevation
ST Segment