Page D-14 Infinity Gamma Series VF4
Respiration
Method Impedance Pneumography
Sensing Electrodes RA and LL (Lead II)
Number of Channels 1
Sweep Speed 6.25 mm/s
Resolution 1 breath per minute
Measurement Range 0 to 155 breaths per minute
Measurement Accuracy ± 1 breath per minute, or ± 2%, whichever is greater
Response Time After a step change in respiration rate, it takes 36 sec-
onds to stabilize to a new respiration rate of 10 breaths
per minute and 18 seconds to stabilize to a new respi-
ration rate of 20 breaths per minute.
Report Interval 2 seconds
Total resistance 0 to 3600 Ω
Input Dynamic Range AC: ± 17.3 Ω ± 10%
DC: 0 Ω to 3.6 kΩ (internal check for high impedance)
Bandwidth 0.25 Hz to 3.5 Hz
Impedance Measuring
Current
65 µA RMS ±10% nominal at 48kHz ±1%, rectangular
wave
etCO
2
Parameter Display etCO2, iCO2, Respiration Rate (RRc)
Measuring Method Dual wavelength, non-dispersive infrared absorption
Measuring Modes Adult and Pediatric: Mainstream and Sidestream
Neonatal: Mainstream only
Warm-Up ≤5 min (at 25 °C)
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