Document Detail

Endotracheal tube versus face mask with and without continuous positive airway pressure (CPAP).
MedLine Citation:
PMID:  8322567     Owner:  NLM     Status:  MEDLINE    
Various ways of delivering continuous positive airway pressure (CPAP) have been extensively studied, with little attention, however, being paid to the effects of an intubation tube compared with breathing through a face mask, with or without CPAP. Pulmonary and cardiovascular variables were measured while 12 patients recovering from coronary artery bypass grafting were spontaneously breathing at ambient airway pressure, then at 7.4 mmHg (1 kPa) CPAP, and again at ambient pressure just before extubation. The same stages were repeated immediately after extubation, with patients breathing through a tight-fitting face mask. Arterial oxygen tension (Pao2, mean +/- s.d.) was better when the patients were breathing at ambient pressure through a face mask (11.7 +/- 2.8 kPa) than when they were intubated (10.6 +/- 2.4 kPa, P < 0.05). Compared with ambient pressure, CPAP (7.4 mmHg) (1 kPa) increased Pao2 in both modes (13.4 +/- 3.5 kPa with mask, and 12.6 +/- 3.5 kPa when intubated, n.s.). The best arterial oxygen saturation was measured during CPAP with a face mask (96 +/- 1%). Cardiac output remained unchanged in all the breathing modes. After coronary artery bypass grafting, spontaneous breathing with a face mask resulted in better Pao2 than breathing through an endotracheal tube, both with and without 7.4 mmHg (1 kPa) CPAP. This study indicates that unnecessary delay in extubation should be avoided.
I Jousela
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta anaesthesiologica Scandinavica     Volume:  37     ISSN:  0001-5172     ISO Abbreviation:  Acta Anaesthesiol Scand     Publication Date:  1993 May 
Date Detail:
Created Date:  1993-08-04     Completed Date:  1993-08-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370270     Medline TA:  Acta Anaesthesiol Scand     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  381-5     Citation Subset:  IM    
Department of Anaesthesia, Helsinki University Central Hospital, Finland.
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MeSH Terms
Central Venous Pressure / physiology
Heart / physiology*
Heart Rate / physiology
Intubation, Intratracheal / instrumentation*
Lung / physiology*
Middle Aged
Oxygen / blood
Oxygen Consumption / physiology
Pleura / physiology
Positive-Pressure Respiration / instrumentation*
Pulmonary Ventilation / physiology
Respiration / physiology
Ventilators, Mechanical
Reg. No./Substance:

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

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