Mindray BeneView T1, Operator'S Manual

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A-8
HR averaging method Mindray algorithm Mortara algorithm
In compliance with the requirements in
Clause 201.7.9.2.9.101 b) 3) of
IEC60601-2-27, the following method is
used:
If the last 3 consecutive RR intervals are
greater than 1200 ms, the 4 most recent
RR intervals are averaged to compute
the HR. Otherwise, heart rate is
computed by subtracting the
maximum and minimum ones from the
most recent 12 RR intervals and then
averaging them.
The HR value displayed on the monitor
screen is updated every second.
In compliance with the requirements in
Clause 201.7.9.2.9.101 b) 3) of
IEC60601-2-27, the following method is
used:
Heart rate is computed by averaging
the most recent 16 RR intervals, unless
the HR by averaging the most recent 4
heart beats is less than or equals to 48.
The HR value displayed on the monitor
screen is updated every second.
Response to irregular rhythm
In compliance with the requirements in Clause 201.7.9.2.9.101 b) 4) of
IEC60601-2-27, the heart rate after 20 seconds of stabilization is displayed as
follows:
Ventricular bigeminy (3a):
Slow alternating ventricular bigeminy (3b):
Rapid alternating ventricular bigeminy (3c):
Bidirectional systoles (3d):
80±1 bpm
60±1 bpm
120±1 bpm
90±2 bpm
Response time to heart rate change Meets the requirements of IEC60601-2-27: Clause 201.7.9.2.9.101 b) 5).
From 80 to 120 bpm: less than 11 s
From 80 to 40 bpm: less than 11 s
Time to alarm for tachycardia
(not available in USA)
Waveform
4ah - range:
4a - range:
4ad - range:
4bh - range:
4b - range:
4bd - range:
< 11 s
< 11 s
< 11 s
< 11 s
< 11 s
< 11 s
Tall T-wave rejection capability When the test is performed based on Clause 201.7.9.2.9.101 b) 2)of IEC60601-2-27,
the heart rate meter will reject all 100 ms QRS complexes with less than 1.2 mV of
amplitude, and T waves with T-wave interval of 180 ms and those with Q-T interval
of 350 ms.
Arrhythmia Analysis Classifications Mindray algorithm Mortara algorithm
Asystole, VFib/VTac, Vtac, Vent. Brady,
Extreme Tachy, Extreme Brady, PVC,
Couplet, Bigeminy, Trigeminy, R on T,
Run PVCs, PVCs, Tachy, Brady, Missed
Beats, Vent. Rhythm, PNP, PNC, Multif.
PVC, Nonsus. Vtac, Pause, Irr. Rhythm,
Afib
Asystole, Vfib, Vtac, Vent. Rhythm,
Couplet, Run PVCs, Bigeminy,
Trigeminy, R on T, Multif. PVC, Irr.
Rhythm, Tachy, Brady, Missed Beats,
PNP, PNC