GE Responder 2000, Руководство по обслуживанию

Страница: 103 / 138

SECTION 8: Specifications and Safety
2025653-048 Revision B Responder
™
2000 Page 103
RHYTHMx
®
ECG Analysis Algorithm
The RHYTHMx
®
ECG analysis algorithm provides superior ECG detection capabilities. The features available with the
Responder 2000 include the following:
• Detection Rate
• Asystole Threshold
• Noise Detection
• Non-Committed Shock
• Synchronized Shock
• SVT Discriminators
• Supraventricular Tachycardia (SVT) Rate
• Continuous Monitoring
The Responder 2000 rejects all T-waves that are 1 millivolt or less in the conditions specified in ANSI/AAMI EC 13 section
4.1.2.1c.
The Responder 2000 will alarm tachycardia in the conditions specified in ANSI/AAMI EC 13 section 4.1.2.1 g) in less than
10 seconds.
For the alternating ECG complexes specified in ANSI/AAMI EC 13 figure 3, the Responder 2000 will indicate the following
heart rates:
Figure 3a 40 bpm
Figure 3b 52 bpm
Figure 3c 59 bpm
Figure 3d 122 bpm
(Refer to the ANSI/AAMI EC 13 for the figures.)
The following sections describe specific RHYTHMx
®
information.
Detection Rate
All ventricular fibrillation (VF) and ventricular tachycardia (VT) rhythms at or above this rate will be classified as shockable.
All rhythms below this rate will be classified as non-shockable. This rate is configurable between 120 bpm (beats per
minute) and 240 bpm. The default Detection Rate for the Responder 2000 is 160 bpm.
Fine VF
Fine VF is classified by the signal amplitude less than 0.2 mV peak-to-peak for eight (8) consecutive seconds, preceded
by a shockable arrhythmia or the peak-to-peak amplitude less than 0.9 mV, the amplitude distribution indicator is less than
amplitude distribution threshold, the derivative probability density function is satisfied, the RR interval index is not regular,
and it is preceded by a shockable rhythm. Fine VF is a shockable arrhythmia.
Asystole
The signal amplitude is less than 0.2 mV peak-to-peak for 8 consecutive seconds and is not preceded by a shockable
rhythm; the rhythm will be classified as Asystole. Asystole is not shockable.
Noise Detection
The Responder 2000 will detect noise artifact in the ECG. Noise could be introduced by excessive moving of the patient
or electronic noise from external sources like cellular and radiotelephones.
Non-Committed Shock
After the Responder 2000 advises a shock, it continues to monitor the patient ECG rhythm. If the patient’s rhythm
changes to a non-shockable rhythm before the shock button is pressed, the shock will be cancelled.