Philips EarlyVue VS30 - Page 249

EarlyVue VS30 Instructions for Use 16-7
CO2 Specifications
To determine the accuracy of airway respiration rate (awRR), Microstream™ technology
simulates breaths for use in respiration rate measurement with a system that uses a tank
of N
2
(representing no CO
2
for inhalation) and a tank of CO
2
(of the percent CO
2
required
for the particular test). A control board, triggered by a computer, uses solenoids to switch
the module input between the two tanks of gas, creating a gas CO
2
square wave. This
system can create simulated breaths over the full required range of specified respiration
rates.
Parameter Specification
CO
2
units mmHg
etCO
2
and imCO
2
Measurement Range
0 mmHg–150 mmHg
Data Sample Rate Waveform sampling, 20 samples per second
Flow Rate 50 ml/min, + 15 ml/min, –7.5 ml/min, flow measured by
volume.
1
CO
2
Reporting
Resolution
0.1 mmHg
etCO
2
and imCO
2
Displayed Resolution
1 mmHg
Initialization Time The time between powering up the monitor and presenting
the first reading is typically 40 seconds; maximum 3 minutes
CO
2
Response Time The total response time for adults/pediatrics is
approximately 2.9 seconds, for 10% to 90% changes in CO
2
concentration. Calculated as follows:
Delay time + Rise time + System response time
CO
2
Delay time: 2.7 seconds (typical)
CO
2
Rise time: 0.2 seconds (typical)
Monitor response time: 1.0 second
The maximum CO
2
response time (with a standard-length
FilterLine™) is 5.3 seconds (typical).
Adult/Pediatric Long FilterLines and Long Smart CapnoLines
have a maximum CO
2
response time of 6.9 seconds (typical).
For information on CO
2
response time for infant/neonatal
patients, see “CO2 Response Time for Infant/Neonatal
Accessories” on page 16-9.
Calibration Interval • First calibration at 1,200 hours of use or after one year,
whichever comes sooner.
• After the first calibration, once a year or after 4,000
hours, whichever comes sooner.
Auto Zero Interval Once per hour (typical)
Leak Tightness < 250 mBar/min when a 30% vacuum is invoked on the flow
system.