Document Detail


Lateral position improves wedge-left atrial pressure correlation during positive-pressure ventilation.
MedLine Citation:
PMID:  6389005     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Because lateral position can be used to locate a pulmonary artery catheter tip in lung regions where venous pressure exceeds alveolar pressure, we studied the effect of lateral position on the correlation between pulmonary artery occlusion pressure (Pw) and left atrial pressure (Pla) at various increments of positive-end expiratory pressure (PEEP). In ten normal anesthetized pigs, catheters were placed in the left atrium and right and left pulmonary arteries; simultaneous measurements of Pla and Pw from both catheters were obtained in the supine, right lateral, and left lateral positions. Pw obtained in the lateral position when the catheter tip was vertically located below the left atrium ("lower") more accurately reflected Pla changes than Pw obtained from catheters above the left atrium, at PEEP levels less than 20 cm H2O. Although most catheter tips were located below the left atrium in the supine position, our data from the lower catheter more accurately assessed Pla than did the Pw obtained in the supine position; this was particularly evident when the catheter tip was located vertically above the left atrium. These findings suggest that the lateral position can be useful in measuring Pw during continuous positive-pressure ventilation. However, further studies in humans are needed before this maneuver can be recommended.
Authors:
F M Hasan; A L Malanga; S S Braman; W M Corrao; A S Most
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Critical care medicine     Volume:  12     ISSN:  0090-3493     ISO Abbreviation:  Crit. Care Med.     Publication Date:  1984 Nov 
Date Detail:
Created Date:  1985-01-03     Completed Date:  1985-01-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0355501     Medline TA:  Crit Care Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  960-4     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Atrial Function*
Critical Care / methods
Positive-Pressure Respiration / methods*
Pulmonary Wedge Pressure*
Swine

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


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