Philips 862474 Manual Do Utilizador

Measuring and Displaying Parameters

Specifications  

Meets the performance standards of ANSI/AAMI EC13-1992. Instead of a 1 mV standardizing voltage 
(section 3.2.2.9), a fixed, 1 cm reference bar is always present in the ECG display, along with the ECG 
size setting expressed in mV/cm. The following information references particular sections of ANSI/
AAMI EC13-1992.

Respiration, leads-off 
sensing waveform.
3.1.2.1 (b)

A 85 kHz square wave is used to inject 50 µA p-p differentially between RA 
and LL.

Tall T-wave rejection.
3.1.2.1 (c)

T-wave of 0.8 mV amplitude will not affect heart rate determination.

Heart rate averaging.
3.1.2.1 (d)

Averages six of the most recent eight detected R-R intervals excluding the 
longest and shortest of the eight intervals.

Response to irregular 
rhythms

3.1.2.1 (e)

a) Ventricular bigeminy - 80 b/min rhythm. 
b) Slow alternating ventricular bigeminy - 30 b/min
c) Rapid alternating ventricular bigeminy - 80 to 103 b/min
d) Bi-directional systoles - 90 to 105 b/min

Heart rate meter 
response time. 

3.1.2.1 (f)

a) Change from 80 to 120 b/min: 4 to 5 sec
b) Change from 80 to 40 b/min: 6 to 8 sec

Time to alarm for 
tachycardia. 

3.1.2.1 (g)

Waveform 4(a) Amplitude

• 0.5  mV
• 1.0  mV
• 2.0  mV

Average Time to Alarm

• 8.6  sec
• 7.0  sec
• 3.0  sec

Waveform 4(b) Amplitude

• 1.0  mV
• 2.0  mV
• 4.0  mV

Average Time to Alarm

• 8.0  sec
• 2.4  sec
• 2.4  sec