Philips Avalon FM20 Instructions For Use Manual page 196

26 Specifications and Standards Compliance
MECG Alarm Specifications Range
MECG Alarm Limits
Tachycardia
Bradycardia
ECG/Arrhythmia/ST Supplemental Information as required by IEC 60601 - 2- 27
Maximum T-wave amplitude
Heart Rate Averaging Method
Display Update Rate
Response Time of Heart Rate Meter to
Change in Heart Rate
Heart Rate Meter Accuracy and
Response to Irregular Rhythm
196
High Range: 31 to 240
Default: 120 bpm
Low Range: 30 to 235
Default: 50 bpm
Difference to high limit: 0 to 50 bpm
Default: 20 bpm
Clamping at: 150 to 240 bpm
Default: 200 bpm
Difference to low limit: 0 to 50 bpm
Default: 20 bpm
Clamping at: 30 to 100 bpm
Default: 40 bpm
a = 8.0 mm
Three different methods are used:
Normally, heart rate is computed by averaging the 12 most
recent RR intervals.
For runs of PVCs, up to 8 RR intervals are averaged to
compute the HR.
If each of 3 consecutive RR intervals is greater than 1200 ms
(that is, rate less than 50 bpm), then the 4 most recent RR
intervals are averaged to compute the HR.
2 s
HR change from 80 to 120 bpm: Average: 9 seconds
HR change from 80 to 40 bpm: Average: 10.5 seconds
Ventricular bigeminy: 63 bpm
Slow alternating ventricular bigeminy: 46 bpm
Rapid alternating ventricular bigeminy: 93 bpm
Bidirectional systoles: 125 bpm
Adjustment
1 bpm steps (30 to 40 bpm)
5 bpm steps (40 to 240 bpm)
5 bpm steps
5 bpm steps
5 bpm steps
5 bpm steps