Document Detail


Observations of ventilation during resuscitation in a canine model.
MedLine Citation:
PMID:  7994856     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Fear of infection limits the willingness of laymen to do cardiopulmonary resuscitation (CPR). This study assessed the time course of change in arterial blood gases during resuscitation with only chest compression (no ventilation) in an effort to identify the time for which ventilation could be deferred. METHODS AND RESULTS: Aortic pressures and arterial blood gases were monitored in seven 20- to 30-kg dogs in ventricular fibrillation (VF) at 2-minute intervals during chest compression alone (no ventilation) at 80 to 100 compressions per minute. Before the induction of ventricular fibrillation, all animals were intubated and ventilated with room air, 10 mL/kg. The endotracheal tube was removed when VF was induced. Pre-VF arterial pH, PCO2, and O2 saturation were (mean +/- SEM) 7.39 +/- 0.02, 27.0 +/- 1.5 mm Hg, and 97.5 +/- 0.5%, respectively, with aortic pressures being 143.2 +/- 5.7/116.2 +/- 4.6 mm Hg. At 4 minutes of chest compression alone, the corresponding values were 7.39 +/- 0.03, 24.3 +/- 3.1 mm Hg, and 93.9 +/- 3.0%, with an arterial pressure of 48.1 +/- 7.7/22.6 +/- 3.9 mm Hg. Mean minute ventilation during the fourth minute of CPR, measured with a face mask-pneumotachometer, was 5.2 +/- 1.1 L/min. CONCLUSIONS: These data suggest that in the dog model of witnessed arrest, chest compression alone during CPR can maintain adequate gas exchange to sustain O2 saturation > 90% for > 4 minutes. The need for immediate ventilation during witnessed arrest should be reexamined.
Authors:
N C Chandra; K G Gruben; J E Tsitlik; R Brower; A D Guerci; H H Halperin; M L Weisfeldt; S Permutt
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Circulation     Volume:  90     ISSN:  0009-7322     ISO Abbreviation:  Circulation     Publication Date:  1994 Dec 
Date Detail:
Created Date:  1995-01-17     Completed Date:  1995-01-17     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0147763     Medline TA:  Circulation     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  3070-5     Citation Subset:  AIM; IM    
Affiliation:
Peter Belfer Laboratory for Myocardial Research, Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, MD.
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MeSH Terms
Descriptor/Qualifier:
Animals
Arteries
Cardiopulmonary Resuscitation* / methods
Dogs
Hydrogen-Ion Concentration
Oxygen / blood
Partial Pressure
Pressure
Respiration*
Thorax
Time Factors
Grant Support
ID/Acronym/Agency:
5P50-HL-17655/HL/NHLBI NIH HHS
Chemical
Reg. No./Substance:
7782-44-7/Oxygen

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


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