Document Detail


Variations in end-expiratory pressure during partial liquid ventilation: impact on gas exchange, lung compliance, and end-expiratory lung volume.
MedLine Citation:
PMID:  10631218     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
STUDY OBJECTIVES: To determine the effects of different levels of positive end-expiratory pressure (PEEP) during partial liquid ventilation (PLV) on gas exchange, lung compliance, and end-expiratory lung volume (EELV). DESIGN: Prospective animal study. SETTING: Animal physiology research laboratory. SUBJECTS: Nine piglets. INTERVENTIONS: Animals underwent saline solution lavage to produce lung injury. Perflubron was instilled via the endotracheal tube in a volume estimated to represent functional residual capacity. The initial PEEP setting was 4 cm H(2)O, and stepwise changes in PEEP were made. At 30-min intervals, the PEEP was increased to 8, then 12, then decreased back down to 8, then 4 cm H(2)O. MEASUREMENTS AND RESULTS: After 30 min at each level of PEEP, arterial blood gases, aortic and central venous pressures, heart rates, dynamic lung compliance, and changes in EELV were recorded. Paired t tests with Bonferroni correction were used to evaluate the data. There were no differences in heart rate or mean BP at the different PEEP levels. CO(2) elimination and oxygenation improved directly with the PEEP level and mean airway pressure (Paw). Compliance did not change with increasing PEEP, but did increase when PEEP was lowered. EELV changes correlated directly with the level of PEEP. CONCLUSIONS: As previously reported during gas ventilation, oxygenation and CO(2) elimination vary directly with PEEP and proximal Paw during PLV. EELV also varies directly with PEEP. Dynamic lung compliance, however, improved only when PEEP was lowered, suggesting an alteration in the distribution of perflubron due to changes in pressure-volume relationships.
Authors:
J M Manaligod; E M Bendel-Stenzel; P A Meyers; D R Bing; J E Connett; M C Mammel
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Chest     Volume:  117     ISSN:  0012-3692     ISO Abbreviation:  Chest     Publication Date:  2000 Jan 
Date Detail:
Created Date:  2000-02-07     Completed Date:  2000-02-07     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0231335     Medline TA:  Chest     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  184-90     Citation Subset:  AIM; IM    
Affiliation:
Infant Pulmonary Research Center, Children's Hospital and Clinics-St. Paul, MN 55102, USA. mamme001@maroon.tc.umn.edu
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MeSH Terms
Descriptor/Qualifier:
Animals
Animals, Newborn
Blood Gas Analysis
Bronchoalveolar Lavage / adverse effects
Disease Models, Animal
Emulsions
Expiratory Reserve Volume / drug effects
Fluorocarbons / administration & dosage*
Hemodynamics
Instillation, Drug
Lung Compliance / drug effects
Positive-Pressure Respiration / methods*
Prospective Studies
Pulmonary Gas Exchange / drug effects,  physiology*
Respiratory Distress Syndrome, Adult / etiology,  physiopathology,  therapy*
Swine
Trachea
Treatment Outcome
Chemical
Reg. No./Substance:
0/Emulsions; 0/Fluorocarbons; 423-55-2/perflubron

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


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