Bexen Reanibex 700, Техническое руководство

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TECHNICAL MANUAL DGG 700 B
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B) QRS Detection – The purpose of this module is the detection of onset of rise of QR in order
to allow the calculation of the cardiac frequency.
QRS detection is also necessary in order to synchronise the discharge of the defibrillation
pulse with the ECG, in the case that the Synchronisms option in <Manual >Defibrillator
mode is activated, or in the case of Ventricular Tachycardia (VT) in Semiautomatic
Defibrillator mode. The QRS ONSET must be detected in a time less than that given in the
following sections: ANSI/AAMI DF2-1996 section 4.3.17, IEC 60601-2-4 section 104. It is
recommended that the time be less than 60 msec.
The shock is synchronized in both cases with the QR ONSET, at 30msec
±
5 msec from the
start of the ONSET.
This meter allows frequency cardiac of up to 300 pulses per minute to be detected.
The detection of the QRS complexes is performed in the FPGA, and it is indicated to the
main processor that obtains the heart rate, taking into account this information.
C) Detection of the Type of cable connected and of a loose lead - This part is entrusted with
determining what type of cable is connected to the REANIBEX 700Series and with
detecting if any of the leads of the above-mentioned cable are disconnected. Depending on
the type of patient cable and of the leads that are disconnected different outputs will be
obtained and visualized.
D) Adaptation and filtering of the ECG signal - It is necessary to adapt the ECG signal to
the characteristics of the equipment, whether it be captured by the electrodes or by the
paddles or by the patient cable. For this purpose adjustment is made in gain and the signal
is filtered. All of this processing allows to the ECG signal to be correctly visualized on-
screen.
The processing of the patient cable signal is isolated from the processing of the signal
obtained from the electrodes/paddles.
6.2.3 Coprocessor (Optional)
This module is only present in those units that have the Semiautomatic Defibrillator option. The
functions of this module are the following:
- Analysis of the ECG signal samples and issue of a diagnosis
- Issuing of audio messages that guide to the user in his procedure