Comen C80 - Page 177

168
Indication
Scanning speed 12.5、25、50mm/s
Gain selection ×1/4、×1/2 、×1、×2、×4
Cardiac Electrophysiology
Noise level
≤30μVP-P.
Cardiac Electrophysiology
Input loop current
≤0.1μA
Input impedance ≥5MΩ
Cardiac Electrophysiology
common mode rejection
ratio(CMRR)
≥105dB
Time constant
Monitoring, surgical mode: ≥0.3s;
Diagnosis mode: ≥3.2s.
protection for defibrillator
discharge
Recovery time no more than 5s after resetting
Heart rate algorithm
Tall T wave
Inhibition
When testing according to YY 1079 Part 4.1.2.1c，heart rate device will
inhibit all QRS wave groups whose amplitudes are below
1.0mV,100ms ,and T wave whose intervals are 180ms and Q-T intervals
350ms
Average heart rate
According to the requirement of YY 1079 Part 4.1.2.1 d，average heart
rate is calculated with following methods : if the last successive RR
intervals are over 1200ms，get the average of the 4 closest RR intervals to
calculate heart rate；otherwise，get the 12 closest RR intervals，remove
the max and min，then calculate the average of them
Heart rate calculation
accuracy and
response to
arrhythmia
According to the requirement of YY 1079 Part 4.1.2.1 e，after 20 sec of a
stabilizing period, the heart rate value is displayed as:
figure 3 a) (coupled rhythm) 80±1bpm;
figure 3 b) (slowly varying coupled rhythm) 60±1bpm;
figure 3 c) (quickly varying coupled rhythm) 120±1bpm;
figure 3 d) (Two-way contraction) 90±2bpm。
Time of response to
heart rate variation
According to the requirement of YY 1079 Part 4.1.2.1 f, heart rate rise
from 80 to 120bpm: in less than 10s；from 80 to 40bpm: in less than 10s。
Time of initiation of
alarm of tachycardia
According to the requirement of YY 1079 Part 4.1.2.1 g，waveform:
figure 4 a) 1-range: 10s；
figure 4 a) 0.5-range: 10s;
figure 4 a) 2-range: 10s;
figure 4 b) 1- range: 10s;
figure 4 b) 0.5- range: 10s;