Physio Control LIFEPAK 15, Руководство по эксплуатации

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Monitoring ETCO2
88
LIFEPAK 15 Monitor/Defibrillator Operating Instructions
Possible Inaccurate Patient Assessment
The EtCO
2
monitor is intended only as an adjunct in
patient assessment and is not to be used as a
diagnostic apnea monitor. An apnea message appears
if a valid breath has not been detected for 30 seconds
and indicates the time elapsed since the last valid
breath. It must be used in conjunction with clinical signs
and symptoms.
Possible Inaccurate CO
2
Readings
Using other manufacturers’ CO
2
accessories may cause
the device to perform improperly and invalidate the
safety agency certifications. Use only the accessories
that are specified in these operating instructions.
Possible Strangulation
Carefully route the patient tubing (FilterLine) to reduce
the possibility of patient entanglement or strangulation.
Infection Hazard
Do not reuse, sterilize, or clean Microstream
®
CO
2
accessories as they are designed for single-patient
one-time use.
Infection Hazard
Do not return air from the CO
2
exhaust port to the
breathing system.
How Capnography Works
An EtCO
2
sensor continuously monitors carbon dioxide (CO
2
) that is inspired and exhaled by the
patient. The sensor employs Microstream non-dispersive infrared (IR) spectroscopy to measure
the concentration of CO
2
molecules that absorb infrared light.
The CO
2
FilterLine system delivers a sample of the exhaled gases directly from the patient into
the LIFEPAK 15 monitor for CO
2
measurement. The low sampling flow rate (50 ml/min) reduces
liquid and secretion accumulation and prevents obstruction, which maintains the shape of the
CO
2
waveform.
The CO
2
sensor captures a micro sample (15 microliters). This extremely small volume allows for
fast rise time and accurate CO
2
readings, even at high respiration rates.
The Microbeam IR source illuminates the sample cell and the reference cell. This proprietary IR
light source generates only the specific wavelengths characteristic of the CO
2
absorption
spectrum. Therefore, no compensations are required when concentrations of O
2
, anesthetic
agent, or water vapor are present in the exhaled breath.