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Philips FM20/30 Instructions For Use Manual Page 272

Release j.3 with software revision j.3x.xx patient monitoring.
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28 Specifications and Standards Compliance
Fetal Heart Rate (Ultrasound/DECG) Alarm Specifications
FHR Alarm Limits
FHR Alarm Delay
MECG Alarm
Specifications
MECG Alarm Limits
Extreme Tachycardia
Extreme Bradycardia
Maternal ECG Supplemental Information as required by IEC 60601-2-27
Heart Rate Averaging Method
Display Update Rate
Ventricular tachycardia alarm for
waveforms B1 and B2
272
Range
Range
Range
High Range: 31—240 bpm
Default: 120 bpm
Low Range: 30—235 bpm
Default: 50 bpm
Difference to high limit: 0—
50 bpm
Default: 20 bpm
Clamping at: 150—240 bpm
Default: 200 bpm
Difference to low limit: 0—
50 bpm
Default: 20 bpm
Clamping at: 30—100 bpm
Default: 40 bpm
The maternal heart rate is computed by averaging the 12 most recent RR intervals.
If each of three consecutive RR intervals is greater than 1200 ms (i.e. rate less than
50 bpm), then the four most recent RR intervals are averaged to compute the HR.
2 seconds
No heart rate is detected for waveforms B1 and B2, resulting in
alarm
Bradycardia (low limit)
Tachycardia (high limit)
Bradycardia (low limit) Delay 10—300 seconds in steps of 10
Tachycardia (high limit) Delay 10—300 seconds in steps of
Signal Loss Delay
Adjustment
1 bpm steps (30—40 bpm)
5 bpm steps (40—
240 bpm)
5 bpm steps
5 bpm steps
5 bpm steps
5 bpm steps
60—200 bpm
adjustable in 10 bpm steps
Default: 110 bpm
70—210 bpm
adjustable in 10 bpm steps
Default: 170 bpm
seconds + system alarm delay
Default: 240 seconds
10 seconds + system alarm delay
Default: 300 seconds
10—30 seconds in steps of
10 seconds + system alarm delay
Alarm Delay
System alarm delay (see
"Fetal Monitors" on
page 267).
*** Extreme Brady

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