Document Detail

High-frequency ventilation with the Dräger Babylog 8000plus: measuring the delivered frequency.
MedLine Citation:
PMID:  20712839     Owner:  NLM     Status:  In-Process    
BACKGROUND: Ventilator frequency is one of the determinants of tidal volume delivery during high-frequency ventilation. Clinicians increasingly use data on ventilator displays to inform their decisions.
AIM: To measure the frequencies delivered by the Dräger Babylog 8000plus ventilator when used in high-frequency mode.
METHODS: Ventilator waveforms using a test lung were recorded at the full range of settings 5-20 Hz using Spectra software at 1000 Hz. The changes in frequency produced by a 1-Hz change in set frequency were calculated. Actual and displayed frequencies were compared.
RESULTS: For settings up to 12 Hz, median (range) difference between set and delivered frequencies was 0 (-0.4 to +0.1) Hz. Above 12 Hz, delivered frequency varied by -0.3 (-1.9 to +0.3) Hz. For 1-Hz changes in frequency settings, in the range 5-12 Hz, 1-Hz changes produced a change in delivered frequency of 1.0 (0.6-1.4) Hz. Above 12 Hz, the corresponding changes were 0.7 (0-2.9) Hz. The ventilator displays the set frequency during operation rather than the delivered frequency.
CONCLUSION: At 12 Hz and below, the differences between set and delivered frequencies were relatively small compared with those at 13 Hz and higher. Above 13 Hz, the difference between set and delivered frequencies was up to 2.9 Hz. Some frequency setting changes did not result in a change in delivered frequency.
K I Wheeler; G M Schmölzer; C J Morley; P G Davis
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-09-06
Journal Detail:
Title:  Acta paediatrica (Oslo, Norway : 1992)     Volume:  100     ISSN:  1651-2227     ISO Abbreviation:  Acta Paediatr.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-12-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9205968     Medline TA:  Acta Paediatr     Country:  Norway    
Other Details:
Languages:  eng     Pagination:  67-70     Citation Subset:  IM    
Copyright Information:
© 2010 The Author(s)/Acta Paediatrica © 2010 Foundation Acta Paediatrica.
Royal Women's Hospital, Melbourne, Australia.
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Comment In:
Acta Paediatr. 2011 Jan;100(1):9-11

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