Document Detail

Improvement in accuracy of transcutaneous measurement of oxygen with resumption of spontaneous ventilation in mechanically ventilated patients after off pump coronary artery bypass procedure: a prospective study.
MedLine Citation:
PMID:  19876749     Owner:  NLM     Status:  MEDLINE    
INTRODUCTION: Transcutaneous measurement of gases depends on the degree of skin perfusion. Mechanical ventilation causes alteration in the peripheral perfusion. The aim of this prospective observational study was to assess change in the accuracy of interchangeability of arterial blood gases with those obtained transcutaneously at various phases of mechanical ventilation such as controlled mandatory, synchronized intermittent mandatory, continuous positive airway pressure ventilations, spontaneous breathing trail and spontaneous ventilation after extubation of endotracheal tube. METHODS: Thirty-two adult patients who underwent uncomplicated off pump coronary artery bypass surgery in a tertiary care medical center were subjected to transcutaneous measurements of gases from the sensor placed on the chest during postoperative ventilation. Arterial blood gas analysis was performed at predetermined time intervals and transcutaneous measurements were repeated each of those time. RESULTS: Fifty-four sets of data were obtained during controlled ventilation and fifty during spontaneous. Correlation coefficient for oxygen increased from 0.46 (P = 0.0004) during controlled ventilation to 0.75 (P < 0.0001) during spontaneous. Bland-Altman and mountain plots suggested better inter- changeability of values between arterial blood gas and transcutaneous gas monitoring. The bias for oxygen changed from 21 during controlled ventilation to 25 during spontaneous ventilation and the precision from 7.1 to 6.4. There was no change in the accuracy of transcutaneous carbon dioxide values during either phase of ventilation. CONCLUSION: The accuracy of transcutaneously measured values of oxygen improved significantly during spontaneous ventilation.
Murali Chakravarthy; Sandeep Narayan; Raghav Govindarajan; Vivek Jawali
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Publication Detail:
Type:  Journal Article     Date:  2009-10-31
Journal Detail:
Title:  Journal of clinical monitoring and computing     Volume:  23     ISSN:  1573-2614     ISO Abbreviation:  J Clin Monit Comput     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2010-01-21     Completed Date:  2010-03-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806357     Medline TA:  J Clin Monit Comput     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  363-8     Citation Subset:  IM    
Wockhardt Hospitals, Mumbai, India.
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MeSH Terms
Blood Gas Monitoring, Transcutaneous / methods*,  standards*
Carbon Dioxide / blood
Coronary Artery Bypass, Off-Pump*
Data Interpretation, Statistical
Oxygen / blood
Postoperative Care
Prospective Studies
Respiration, Artificial / methods*
Retrospective Studies
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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

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