Document Detail


Pressure-volume curves, static compliances and gas exchange in hyaline membrane disease during conventional mechanical and high-frequency ventilation.
MedLine Citation:
PMID:  3042826     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Eight premature infants with hyaline membrane disease needing artificial ventilation were studied at a mean age of 26.5 h. After a preparative phase they were randomly assigned either first to conventional mechanical ventilation (CMV; delivered by a Siemens Servo 900 C), followed by high-frequency ventilation (HFV; delivered by Percussionaire VDR 1 at 10 Hz) or vice versa, each period lasting 4 h. At the end of each period, arterial blood gases, lung volumes and alveolar pressures (Palv) during CMV or HFV and pressure-volume (P-V) curves of the total respiratory system were determined. Expiratory volumes were measured spirometrically, Palv by the clamping method, and the P-V curve was constructed by the syringe method. Single point static compliance at end-inspiration was higher during HFV (0.40 +/- 0.10 vs. 0.32 +/- 0.08 ml/cmH2O.kg-1; p = 0.02), whereas at end-expiration no difference was noted. Two points static compliances were also better during HFV than during CMV (0.32 +/- 0.08 vs. 0.24 +/- 0.06 ml/cmH2O.kg-1; p = 0.01). Static compliances derived from the steepest part of the inflation limb of the P-V curve were 0.55 +/- 0.12 after CMV and 0.50 +/- 0.12 ml/cmH2O.kg-1 after HFV (n.s.). Compared to CMV, HFV resulted in similar oxygenation and CO2-elimination at equal mean lung volumes, but at significantly lower mean Palv. It is concluded that recruitment of lung volume is achieved with less static recoil pressure by HFV. These findings are explained by differences in inspiration allowing more time for volume recruitment during HFV.
Authors:
J Pfenninger; C Minder
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Publication Detail:
Type:  Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial    
Journal Detail:
Title:  Intensive care medicine     Volume:  14     ISSN:  0342-4642     ISO Abbreviation:  Intensive Care Med     Publication Date:  1988  
Date Detail:
Created Date:  1988-09-16     Completed Date:  1988-09-16     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7704851     Medline TA:  Intensive Care Med     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  364-72     Citation Subset:  IM    
Affiliation:
Intensive Care Unit, University Childrens Hospital Berne, Switzerland.
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MeSH Terms
Descriptor/Qualifier:
Clinical Trials as Topic
Compliance
Female
High-Frequency Ventilation*
Humans
Hyaline Membrane Disease / physiopathology,  therapy*
Infant, Newborn
Male
Prospective Studies
Pulmonary Gas Exchange
Random Allocation
Respiration, Artificial*
Respiratory System / physiopathology*

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


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