Capnogram slope and ventilation dead space parameters

Comparison of mainstream and sidestream techniques

A. L. Balogh, F. Peták, G. H. Fodor, J. Tolnai, Z. Csorba, B. Babik, T. Asai

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Background Capnography may provide useful non-invasive bedside information concerning heterogeneity in lung ventilation, ventilation-perfusion mismatching and metabolic status. Although the capnogram may be recorded by mainstream and sidestream techniques, the capnogram indices furnished by these approaches have not previously been compared systematically. Methods Simultaneous mainstream and sidestream time and volumetric capnography was performed in anaesthetized, mechanically ventilated patients undergoing elective heart surgery. Time capnography was used to assess the phase II (SII,T) and III slopes (SIII,T). The volumetric method was applied to estimate phase II (SII,V) and III slopes (SIII,V), together with the dead space values according to the Fowler (VDF), Bohr (VDB), and Enghoff (VDE) methods and the volume of CO2 eliminated per breath (VCO2). The partial pressure of end-tidal CO2 (PETCO2) was registered. Results Excellent correlation and good agreement were observed in SIII,T measured by the mainstream and sidestream techniques [ratio=1.05 (sem 0.16), R2=0.92, PIII,V [1.32 (0.28), R2=0.93, PDF, VDB, and VDE, the agreement between the mainstream and sidestream techniques in the difference between VDE and VDB, reflecting the intrapulmonary shunt, was excellent [0.97 (0.004), R2=0.92, P2 volumes) requires the application of a mainstream device.

Original languageEnglish
Pages (from-to)109-117
Number of pages9
JournalBritish Journal of Anaesthesia
Volume117
Issue number1
DOIs
Publication statusPublished - Jul 1 2016

Fingerprint

Capnography
Ventilation
Partial Pressure
Thoracic Surgery
Perfusion
Equipment and Supplies
Lung

Keywords

  • Capnography
  • Carbon dioxide
  • Intraoperative monitoring
  • Mechanical ventilation
  • Ventilation-perfusion ratio

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine

Cite this

Capnogram slope and ventilation dead space parameters : Comparison of mainstream and sidestream techniques. / Balogh, A. L.; Peták, F.; Fodor, G. H.; Tolnai, J.; Csorba, Z.; Babik, B.; Asai, T.

In: British Journal of Anaesthesia, Vol. 117, No. 1, 01.07.2016, p. 109-117.

Research output: Contribution to journalArticle

Balogh, A. L. ; Peták, F. ; Fodor, G. H. ; Tolnai, J. ; Csorba, Z. ; Babik, B. ; Asai, T. / Capnogram slope and ventilation dead space parameters : Comparison of mainstream and sidestream techniques. In: British Journal of Anaesthesia. 2016 ; Vol. 117, No. 1. pp. 109-117.
@article{6620015340164234914dc5f3a597cc7f,
title = "Capnogram slope and ventilation dead space parameters: Comparison of mainstream and sidestream techniques",
abstract = "Background Capnography may provide useful non-invasive bedside information concerning heterogeneity in lung ventilation, ventilation-perfusion mismatching and metabolic status. Although the capnogram may be recorded by mainstream and sidestream techniques, the capnogram indices furnished by these approaches have not previously been compared systematically. Methods Simultaneous mainstream and sidestream time and volumetric capnography was performed in anaesthetized, mechanically ventilated patients undergoing elective heart surgery. Time capnography was used to assess the phase II (SII,T) and III slopes (SIII,T). The volumetric method was applied to estimate phase II (SII,V) and III slopes (SIII,V), together with the dead space values according to the Fowler (VDF), Bohr (VDB), and Enghoff (VDE) methods and the volume of CO2 eliminated per breath (VCO2). The partial pressure of end-tidal CO2 (PETCO2) was registered. Results Excellent correlation and good agreement were observed in SIII,T measured by the mainstream and sidestream techniques [ratio=1.05 (sem 0.16), R2=0.92, PIII,V [1.32 (0.28), R2=0.93, PDF, VDB, and VDE, the agreement between the mainstream and sidestream techniques in the difference between VDE and VDB, reflecting the intrapulmonary shunt, was excellent [0.97 (0.004), R2=0.92, P2 volumes) requires the application of a mainstream device.",
keywords = "Capnography, Carbon dioxide, Intraoperative monitoring, Mechanical ventilation, Ventilation-perfusion ratio",
author = "Balogh, {A. L.} and F. Pet{\'a}k and Fodor, {G. H.} and J. Tolnai and Z. Csorba and B. Babik and T. Asai",
year = "2016",
month = "7",
day = "1",
doi = "10.1093/bja/aew127",
language = "English",
volume = "117",
pages = "109--117",
journal = "British Journal of Anaesthesia",
issn = "0007-0912",
publisher = "Oxford University Press",
number = "1",

}

TY - JOUR

T1 - Capnogram slope and ventilation dead space parameters

T2 - Comparison of mainstream and sidestream techniques

AU - Balogh, A. L.

AU - Peták, F.

AU - Fodor, G. H.

AU - Tolnai, J.

AU - Csorba, Z.

AU - Babik, B.

AU - Asai, T.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - Background Capnography may provide useful non-invasive bedside information concerning heterogeneity in lung ventilation, ventilation-perfusion mismatching and metabolic status. Although the capnogram may be recorded by mainstream and sidestream techniques, the capnogram indices furnished by these approaches have not previously been compared systematically. Methods Simultaneous mainstream and sidestream time and volumetric capnography was performed in anaesthetized, mechanically ventilated patients undergoing elective heart surgery. Time capnography was used to assess the phase II (SII,T) and III slopes (SIII,T). The volumetric method was applied to estimate phase II (SII,V) and III slopes (SIII,V), together with the dead space values according to the Fowler (VDF), Bohr (VDB), and Enghoff (VDE) methods and the volume of CO2 eliminated per breath (VCO2). The partial pressure of end-tidal CO2 (PETCO2) was registered. Results Excellent correlation and good agreement were observed in SIII,T measured by the mainstream and sidestream techniques [ratio=1.05 (sem 0.16), R2=0.92, PIII,V [1.32 (0.28), R2=0.93, PDF, VDB, and VDE, the agreement between the mainstream and sidestream techniques in the difference between VDE and VDB, reflecting the intrapulmonary shunt, was excellent [0.97 (0.004), R2=0.92, P2 volumes) requires the application of a mainstream device.

AB - Background Capnography may provide useful non-invasive bedside information concerning heterogeneity in lung ventilation, ventilation-perfusion mismatching and metabolic status. Although the capnogram may be recorded by mainstream and sidestream techniques, the capnogram indices furnished by these approaches have not previously been compared systematically. Methods Simultaneous mainstream and sidestream time and volumetric capnography was performed in anaesthetized, mechanically ventilated patients undergoing elective heart surgery. Time capnography was used to assess the phase II (SII,T) and III slopes (SIII,T). The volumetric method was applied to estimate phase II (SII,V) and III slopes (SIII,V), together with the dead space values according to the Fowler (VDF), Bohr (VDB), and Enghoff (VDE) methods and the volume of CO2 eliminated per breath (VCO2). The partial pressure of end-tidal CO2 (PETCO2) was registered. Results Excellent correlation and good agreement were observed in SIII,T measured by the mainstream and sidestream techniques [ratio=1.05 (sem 0.16), R2=0.92, PIII,V [1.32 (0.28), R2=0.93, PDF, VDB, and VDE, the agreement between the mainstream and sidestream techniques in the difference between VDE and VDB, reflecting the intrapulmonary shunt, was excellent [0.97 (0.004), R2=0.92, P2 volumes) requires the application of a mainstream device.

KW - Capnography

KW - Carbon dioxide

KW - Intraoperative monitoring

KW - Mechanical ventilation

KW - Ventilation-perfusion ratio

UR - http://www.scopus.com/inward/record.url?scp=84977138715&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84977138715&partnerID=8YFLogxK

U2 - 10.1093/bja/aew127

DO - 10.1093/bja/aew127

M3 - Article

VL - 117

SP - 109

EP - 117

JO - British Journal of Anaesthesia

JF - British Journal of Anaesthesia

SN - 0007-0912

IS - 1

ER -