Book contents
- Capnography
- Capnography
- Copyright page
- Contents
- Contributors
- Preface
- Commonly used abbreviations
- 1 Clinical perspectives
- 1 Ventilation
- 2 Ventilation Capnography and respiratory assessment outside of the operating room
- 3 Airway management in the out-of-hospital setting
- 4 Airway management in the hospital setting
- 5 Airway management in the operating room
- 6 Capnography during anesthesia
- 7 Monitoring during mechanical ventilation
- 8 Capnography during transport of patients (inter/intrahospital)
- 9 Capnography as a guide to ventilation in the field
- 10 Neonatal monitoring
- 11 Capnography in sleep medicine
- 12 Conscious sedation
- 13 Capnometry monitoring in high- and low-pressure environments
- 14 Biofeedback
- 15 Capnography in non-invasive positive pressure ventilation
- 16 End-tidal carbon dioxide monitoring in postoperative ventilator weaning
- 17 Optimizing the use of mechanical ventilation and minimizing its requirement with capnography
- 18 Volumetric capnography for monitoring lung recruitment and PEEP titration
- 19 Capnography and adjuncts of mechanical ventilation
- 20 Cardiopulmonary resuscitation
- 21 Capnography and pulmonary embolism
- 22 Non-invasive cardiac output via pulmonary blood flow
- 23 PaCO2, PetCO2, and gradient
- 24 The physiologic basis for capnometric monitoring in shock
- 25 Carbon dioxide production, metabolism, and anesthesia
- 26 Tissue- and organ-specific effects of carbon dioxide
- 27 Atmospheric monitoring outside the healthcare environment and within enclosed environments: a historical perspective
- 28 Capnography in veterinary medicine
- 29 Carbon dioxide pathophysiology
- 30 Acid–base balance and diagnosis of disorders
- 31 Ventilation/perfusion abnormalities and capnography
- 32 Capnographic measures
- 33 Improving the analysis of volumetric capnograms
- 34 Capnography and the single-path model applied to cardiac output recovery and airway structure and function
- 35 Carbon dioxide and the control of breathing: a quantitative approach
- 36 Technical specifications and standards
- 37 Carbon dioxide measurement
- 38 Gas flow measurement
- 39 Combining flow and carbon dioxide
- 40 Brief history of time and volumetric capnography
- 41 The first years of clinical capnography
- 42 The early days of volumetric capnography
- Appendix: Patterns of time-based capnograms
- Index
32 - Capnographic measures
from 1 - Ventilation
Published online by Cambridge University Press: 05 August 2011
Book contents
- Capnography
- Capnography
- Copyright page
- Contents
- Contributors
- Preface
- Commonly used abbreviations
- 1 Clinical perspectives
- 1 Ventilation
- 2 Ventilation Capnography and respiratory assessment outside of the operating room
- 3 Airway management in the out-of-hospital setting
- 4 Airway management in the hospital setting
- 5 Airway management in the operating room
- 6 Capnography during anesthesia
- 7 Monitoring during mechanical ventilation
- 8 Capnography during transport of patients (inter/intrahospital)
- 9 Capnography as a guide to ventilation in the field
- 10 Neonatal monitoring
- 11 Capnography in sleep medicine
- 12 Conscious sedation
- 13 Capnometry monitoring in high- and low-pressure environments
- 14 Biofeedback
- 15 Capnography in non-invasive positive pressure ventilation
- 16 End-tidal carbon dioxide monitoring in postoperative ventilator weaning
- 17 Optimizing the use of mechanical ventilation and minimizing its requirement with capnography
- 18 Volumetric capnography for monitoring lung recruitment and PEEP titration
- 19 Capnography and adjuncts of mechanical ventilation
- 20 Cardiopulmonary resuscitation
- 21 Capnography and pulmonary embolism
- 22 Non-invasive cardiac output via pulmonary blood flow
- 23 PaCO2, PetCO2, and gradient
- 24 The physiologic basis for capnometric monitoring in shock
- 25 Carbon dioxide production, metabolism, and anesthesia
- 26 Tissue- and organ-specific effects of carbon dioxide
- 27 Atmospheric monitoring outside the healthcare environment and within enclosed environments: a historical perspective
- 28 Capnography in veterinary medicine
- 29 Carbon dioxide pathophysiology
- 30 Acid–base balance and diagnosis of disorders
- 31 Ventilation/perfusion abnormalities and capnography
- 32 Capnographic measures
- 33 Improving the analysis of volumetric capnograms
- 34 Capnography and the single-path model applied to cardiac output recovery and airway structure and function
- 35 Carbon dioxide and the control of breathing: a quantitative approach
- 36 Technical specifications and standards
- 37 Carbon dioxide measurement
- 38 Gas flow measurement
- 39 Combining flow and carbon dioxide
- 40 Brief history of time and volumetric capnography
- 41 The first years of clinical capnography
- 42 The early days of volumetric capnography
- Appendix: Patterns of time-based capnograms
- Index
Summary
Levels of CO2 may be represented as a trace versus time (time capnography) or expiratory volume (volumetric capnography). This chapter discusses the clinical data obtained by the morphological analysis of a capnogram and from the derived measurements. The main factors that may cause a progressive rise in the baseline are related to the presence of CO2 in inspiratory gas. Other factors such as changes in cardiac output, CO2 production, airway resistance, and functional residual capacity (FRC) can further influence the single ventilation/perfusion (V/Q) ratio of the various lung units, affecting the height or slope of the phase III curve. The advanced technology combination of airway flow monitoring and mainstream capnography allows pulmonary deadspace evaluation (VD) and CO2 production (VOCO2) to be calculated. Technologic improvements have enabled the use of combined sensors for simultaneous measurement and recording of expiratory flow and CO2 elimination at the patient's bedside.
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- Capnography , pp. 329 - 339Publisher: Cambridge University PressPrint publication year: 2011