Document Detail

Trigger delay in infant ventilators.
MedLine Citation:
PMID:  9394433     Owner:  NLM     Status:  MEDLINE    
In an experimental study we determined the response trigger delay time of three infant ventilators with a capacity to detect and support spontaneous breathing. We measured this in anaesthetized cats as the time between the start of phrenic nerve activity and the increase in airway pressure caused by the subsequent inflation. Two modes of ventilatory support were used, namely Assist/Control (A/C) and synchronised intermittent mandatory ventilation (SIMV). We found that ventilators equipped with flow sensors close to the free end of the endotracheal tube had a shorter trigger delay than a ventilator which detected breathing with an abdominal sensor. Further, the trigger delay was shorter in SIMV mode than in A/C mode of operation. A higher set sensitivity reduced the response time. We conclude that triggered ventilation may be used in infants, at least when the spontaneous breathing rate is below 60 breaths per minute. This mode of ventilation could be useful when infants are to be weaned off the ventilator.
A Liubsys; T Norsted; A Jonzon; G Sedin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Upsala journal of medical sciences     Volume:  102     ISSN:  0300-9734     ISO Abbreviation:  Ups. J. Med. Sci.     Publication Date:  1997  
Date Detail:
Created Date:  1997-12-29     Completed Date:  1997-12-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0332203     Medline TA:  Ups J Med Sci     Country:  SWEDEN    
Other Details:
Languages:  eng     Pagination:  109-19     Citation Subset:  IM    
Department of Pediatrics, Uppsala University, Sweden.
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MeSH Terms
Sensitivity and Specificity
Time Factors
Ventilators, Mechanical*

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