Document Detail

Effects of perfluorohexan vapor on gas exchange, respiratory mechanics, and lung histology in pigs with lung injury after endotoxin infusion.
MedLine Citation:
PMID:  16129984     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Inhaled perfluorohexan vapor has been shown to improve gas exchange and pulmonary mechanics in oleic acid- and ventilator-induced lung injury. However, in the clinical setting, lung injury frequently occurs in the context of systemic inflammation and consecutive lung injury, which may be induced experimentally by intravenous administration of endotoxin. The authors studied whether vaporized perfluorohexan is efficacious during endotoxin-induced lung injury in domestic pigs. METHODS: Twenty-two pigs (29 [23, 31] kg body weight [first, third interquartile]; tracheostomy) were anesthetized and mechanically ventilated. In the endotoxin (n = 8) and perfluorohexan groups (n = 7), we administered endotoxin of Escherichia coli 111:B4, 1 . h for 1 h and 10 for 5 h in consecutive order. In the perfluorohexan group, inhalation of the test drug was started 2 h 30 min after the start of the intravenous endotoxin and terminated after 30 min. In a control group (n=7), animals were instrumented and observed over time without further intervention. Oxygenation function was assessed from oxygen partial pressures (Po2, blood gases) and calculated shunt fraction. Respiratory compliance was calculated from airway pressure and tidal volume. Measurements were performed before and every hour during endotoxin infusion. RESULTS: After 6 h of endotoxin, gas exchange and pulmonary compliance were deteriorated in the endotoxin group (Pao2: 184 [114, 289] vs. 638 [615, 658] mmHg, pulmonary shunt fraction: 30 [23, 38] vs. 4 [3, 6]%, respiratory compliance: 12 [11, 14] vs. 22 [19, 23] ml/mbar; P < 0.05, endotoxin vs. control). Inhalation of vaporized perfluorohexan did not improve Pao 2 (107 [60, 221] mmHg), pulmonary shunt fraction (32 [26, 58]%), or respiratory compliance (14 [10, 17] ml/mbar) when compared with intravenous endotoxin (not significant, perfluorohexan vs. endotoxin). CONCLUSIONS: Inhalation of vaporized perfluorohexan does not improve pulmonary gas exchange or respiratory compliance in endotoxin-induced porcine lung injury.
Gregor I Kemming; Michael Flondor; Anja Hanser; Sabine Pallivathukal; Markus Holtmannspötter; Florian F Kneisel; Daniel A Reuter; Hille Kisch-Wedel; Bernhard Zwissler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Anesthesiology     Volume:  103     ISSN:  0003-3022     ISO Abbreviation:  Anesthesiology     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-08-30     Completed Date:  2005-10-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  1300217     Medline TA:  Anesthesiology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  585-94     Citation Subset:  AIM; IM    
Institute for Surgical Research and Clinic of Anesthesiology, Ludwig-Maximilians-University, Munich, Germany.
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MeSH Terms
Administration, Inhalation
Endotoxins / toxicity*
Fluorocarbons / administration & dosage*
Lung / drug effects*,  pathology
Pulmonary Gas Exchange / drug effects*
Respiratory Mechanics / drug effects*
Reg. No./Substance:
0/Endotoxins; 0/Fluorocarbons; 355-42-0/perfluorohexane

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

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