A-11
Mortara algorithm
Only the differences from the Basic algorithm are listed.
HR
HR averaging method
In compliance with the requirements in Clause 4.1.2.1 d) of
ANSI/AAMI EC13, 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 bpm.
The HR value displayed on the monitor screen is updated every
second.
Arrhythmia Analysis
Classifications
Asystole, Vfib, Vtac, Vent. Rhythm, Couplet, VT>2, Bigeminy,
Trigeminy, R on T, Multif. PVC, Irr. Rhythm, Tachy, Brady,
Missed Beats, PNP, PNC
ST Segment Analysis
Refreshing rate per 16 heartbeats
A.5.2 Resp
Technique Trans-thoracic impedance
Lead Options are lead I and II. The default is lead II.
Waveform gain X 0.25, X 0.5, X 1, X 2, X 3, X 4, X 5
Excitation current <620 μA RMS
Respiration impedance range 0.3 to 5Ω
Baseline impedance range 200 to 2500Ω (without the 1kΩ resistance of the ECG cable)
Linear signal range At least 3 Ω p-p
Minimum detection height
It changes according to the settings of display ratio. It is 0.3 Ω
when the display ratio is ×5.
Differential input impedance >5 MΩ
Bandwidth 0.2 to 2 Hz (-3 dB)
Noise
<0.1 Ω (peak value) (using standard ECG cable, patient
impedance 500Ω)
Sweep speed 6.25 mm/s, 12.5 mm/s or 25 mm/s
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