Philips IntelliVue TRx, Instructions For Use Manual

Page: 135 / 274

Draft - 1 Aug 08
ST/AR ST Segment Algorithm
ST/AR Arrhythmia Monitoring 7-7
ST/AR ST Segment Algorithm
Intended
Use
The intended use of the ST/AR ST Analysis algorithm is to monitor an adult
patient’s ECG for ST segment elevation or depression and produce events/
alarms for all possible ECG leads. The ST Analysis algorithm is capable of
monitoring paced and non-paced adult patients.
Note—
The ST Analysis algorithm does not analyze ventricularly paced or
ventricular ectopic beats.
Warning Warning
This device provides ST level change information; the clinical significance
of the ST level change information needs to be determined by a physician.
The ST/AR ST algorithm at the Information Center monitors ST segment
elevation or depression for each available telemetry ECG lead and produces
events/alarms simultaneously. ST values update with every measurement period
and enunciate, depending upon the severity of the change, events and alarms as
they are detected.
The ST/AR ST algorithm is approved for use only with non-paced and atrially-
paced adult telemetry-monitored patients. With EASI monitoring, ST analysis is
performed on up to 12 leads, and an additional value of ST index is calculated
and displayed (see “EASI ST Analysis” on page 7-9). Assessment of EASI-
derived 12-lead ST measurement is recommended for adult patients that meet
the following parameters:
• Ages: 33-82 years
• Heights: 147 to 185 cm (58 to 73 in)
• Weights: 53 to 118 kg (117 to 261 lbs)
• Height to Weight Ratios: 1.41 to 2.99 cm/kg (0.25 to 0.54 in/lb)
All ST analysis and ST alarms for telemetry patients are performed by the
Information Center.
For additional information on ST monitoring, refer to the following
documentation: