Document Detail


Comparison between the cuffed oropharyngeal airway and the laryngeal mask with respect to breathing pattern and capnography.
MedLine Citation:
PMID:  11534312     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study evaluates spontaneous breathing and CO2-monitoring under sevoflurane anesthesia with a cuffed oropharyngeal (COPA) or laryngeal mask (LMA) as airway. Forty patients (ASA I-II) scheduled for varicose vein surgery were given 2 mg.kg-1 propofol for insertion of a COPA or a LMA. Anesthesia was maintained with sevoflurane at 2.5 vol% in 40/60% O2/N2O, while the patients breathed spontaneously. Arterial and end-tidal CO2 partial pressures (PaCO2, PE'CO2), respiratory rate (RR), tidal volume (VT) and expired minute volume (EMV) were recorded at different times before and during the procedure. The dead space (VD) was calculated from the modified Bohr equation. The PaCO2 and the PE'CO2 were generally lower in the LMA group as compared to the COPA group during most of the procedure. EMV was also higher in the LMA group as compared to the COPA group. This difference becomes statistically significant 5 min. before the end of surgery (6.22 +/- 0.34 vs. 5.23 +/- 0.39 L.min-1). RR was consistently higher in the LMA group, while VT and VD were similar. Correlation of PE'CO2 and PaCO2 was 0.87 when measured in the COPA group and 0.88 in the LMA group. The prediction of PaCO2 by PE'CO2 was more sensitive in the LMA group as compared to the COPA group. We conclude that spontaneous breathing is better with the LMA.
Authors:
P Deryckere; C Verborgh; F Camu
Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Acta anaesthesiologica Belgica     Volume:  52     ISSN:  0001-5164     ISO Abbreviation:  Acta Anaesthesiol Belg     Publication Date:  2001  
Date Detail:
Created Date:  2001-09-05     Completed Date:  2002-01-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0421022     Medline TA:  Acta Anaesthesiol Belg     Country:  Belgium    
Other Details:
Languages:  eng     Pagination:  191-9     Citation Subset:  IM    
Affiliation:
Department of Anaesthesiology, Free University of Brussels, Belgium.
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MeSH Terms
Descriptor/Qualifier:
Anesthesia, Inhalation / instrumentation*
Anesthetics, Inhalation
Capnography*
Female
Humans
Laryngeal Masks*
Male
Methyl Ethers
Middle Aged
Oropharynx
Respiration*
Chemical
Reg. No./Substance:
0/Anesthetics, Inhalation; 0/Methyl Ethers; 28523-86-6/sevoflurane

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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