![]() ![]() ![]() ![]() ETCO2>24.5 mmHg has sensitivity of 90%, ETCO2ETCO2>35 mmHg has a sensitivity 100%, ETCO2250.ETCO2 monitoring detects clinically signifcant respiratory events before SPO2 or clinically noted apnea/hypoventilation.Capnography will show real-time respiratory changes and apnea.ETCO2 level of 10mmHg or less after 20 min of CPR predicts death.Loss of ROSC can be determined by a significant drop signifies drop in ETCO2.CPR does not have to be stopped for pulse checks.20mHg has a sensitivity of 20% and a specificity of 99% for ROSC.10mHg has a sensitivity of 33% and a specificity of 97% for ROSC.Attaining ROSC is associated with an ETCO2 jump 10mmHg with ROSC (13.5 on average).ETCO2 10-20mmHg signifies high quality chest compressions.In out of hospital use, this had SN 1.0 and SP 1.0 in detected good placement Ĭardiac Arrest Monitoring Ensure adequate chest compressions.Assess for ETT placement using presents of measurable ETCO2 and waveform.The curve peaks at the end of Phase III which is noted as the End-Tidal CO2 measurement.This is followed by a more gradual increase in CO2 (Phase III).Then a rapid rise in CO2 rich air is noted (Phase II).Exhalation will first expel dead space air (Phase I).Indirectly measures overall metabolism (or lack there of in cardiac arrest).Directly measure the function of ventilation (not oxygenation).45mmHg = Hypercapnia or Hypoventilation.ETCO2 of 35-45mmHg is considered normal.Capnography measures the amount of exhaled CO2.Processes that increase alveolar dead space:.Due to dilution of CO2 in alveolar dead space.EtCO2 is ~3-5 mmHg less than PaCO2 - see EBQ:End-Tidal CO2 PaCO2 correlation.Sidestream CO2 monitors use special NC to detect CO2.Mainstream (or inline) CO2 monitors are placed within the closed circuit of the ventilator (or BVM).Quantitative devices give numeric values.Colorimetric EtCO2 devices change color from purple (CO2 absent) to yellow (CO2 present).Qualitative devices indicate presence or absence of EtCO2.End-tidal CO2 monitors can be qualitative or quantitative. ![]()
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