Welch Allyn Acuity and Mobile Acuity LT Central Monitoring Systems - User Manual - Manual (Page 182)

178 Chapter 11 Specifications Welch Allyn Acuity Central Monitoring System
Acuity System pacemaker detection
Table 24. Pacemaker detection with the Acuity System Arrhythmia Analysis module
Monitor Characteristic Specification
Micropaq Acuity System
Virtual Monitor Pacer indicator shown on screen if PACER display turned ON; pacer spike
always shown if of sufficient amplitude.
Pacer Pulse
Detection/
Rejection Pacer detection range (i.e., shows the dashed vertical marker) for ±3 mV to
±700 mV @ 0.1 ms width, ±2 mV to ±700 mV @ 0.2 to 2 ms pulse width in
electrically quiet environment. Thresholds adjust to reject repetitive
ambient noise. Pacer detector influences QRS picking even while pacer
indication is disabled.
Does not count as heartbeats approximately 95% of pacemaker pulses
within pacer detection range
a , with or without AAMI (EC13-1992) tails of 4,
25, 50, 75 or 100 ms decay time constant, whose tail amplitudes are up to
25%, 2 mV maximum, whether ventricular only, or A-V sequential pulses
(150 and 250 ms separation), all per AAMI 1992 tests 3.1.4.1 and 3.1.4.2.
Propaq CS
Propaq Encore Acuity System
Virtual Monitor Pacer indicator shown on screen if PACER display turned ON; pacer spike
always shown if of sufficient amplitude.
Pacer Pulse
Detection/
Rejection Pacer detection range (i.e., shows the dashed vertical marker) for 0.1 ms
pulses is ±3 mV to ±700 mV, and drops linearly to ±2 mV to ±700 mV for 0.2
to 2 ms pulses. Pacer detector influences QRS picking even while pacer
indication is disabled.
Does not count as heartbeats approximately 95% of pacemaker pulses that
are within pacer detection range
a with or without AAMI (EC13 1992) tails of
4, 25, or 50, 75 or 100 ms decay time constant, whose tail amplitudes are
2.5% or 25%, 2 mV maximum, whether ventricular only, or A-V sequential
pulses, all per AAMI 1992 tests 3.1.4.1 and 3.1.4.2
Propaq LT Acuity System
Virtual Monitor Pacer indicator shown on screen if PACER display turned ON; pacer spike
always shown if of sufficient amplitude.
Pacer Pulse
Detection/
Rejection Pacer detection range= ±3.2 mV to ±700 mV @ 0.1 ms width, ±2 mV to ±700
mV @ 0.2 to 2 ms pulse width, all with or without overshoot, in electrically
quiet environment. Thresholds adjust to reject repetitive ambient noise.
Pacer detector influences QRS picking even while pacer display indication is
disabled.
Does not count as heartbeats approximately 95% of pacemaker pulses
within pacer pulse detection range
a
, with or without AAMI (EC13 2002) tails
of 4, 8, 15, 25, 50, 75, or 100 ms decay time constant, whose tail amplitudes
meet either EC13’s method A or method B specifications, whether
ventricular only, or A-V sequential pulses (150 and 250 ms separation), all
per AAMI tests 4.1.4.1 and 4.1.4.2
a. Rejects method B overshoots for [pulse width] x [pulse amplitude] < 3 x 10 -4 V-sec.