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BJA Advance Access published online on January 16, 2006
British Journal of Anaesthesia, doi:10.1093/bja/ael001
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© The Board of Management and Trustees of the British Journal of Anaesthesia 2006. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org
Accepted December 12, 2005

Clinical Investigation

The LMA CTrachTM, a new laryngeal mask airway for endotracheal intubation under vision: evaluation in 100 patients

E. H. C. Liu 1 *, R. W. L. Goy 2, and F. G. Chen 1

1 Department of Anaesthesia, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Department of Anaesthesia, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074
2 Department of Anaesthesia, National University Hospital, 5 Lower Kent Ridge Road, Singapore 119074

* To whom correspondence should be addressed.
E. H. C. Liu, E-mail: analiue{at}nus.edu.sg


  Abstract

Background. The LMA CTrachTM is a new laryngeal mask system consisting of an LMA CTrachTM Airway with integrated fibreoptic channels, and a detachable LMA CTrachTM Viewer. This system enables viewing of the larynx and aids endotracheal intubation through a laryngeal mask airway.

Method. We used and evaluated this system in 100 adult patients undergoing general anaesthesia for elective surgery. Our primary outcomes were the success rates of LMA CTrachTM Airway insertion and endotracheal intubation with this system.

Results. We were able to insert the LMA CTrachTM Airway in and to ventilate all 100 patients. We were successful in endotracheal intubation, either under vision or blind, in 96 patients. We were able to view the larynx in 84 patients, but the quality of the best view obtained was very variable. The median (inter quartile range) time for the complete intubation process was 166 (114-233) s. The system allowed nearly continuous ventilation and oxygenation during the process.

Conclusions. The LMA CTrachTM system has potential advantages over the LMA FastrachTM system, including the ability to align the LMA outlet with the larynx and a high first intubation attempt success rate. However, it was difficult to view the larynx with the LMA CTrachTM compared with direct laryngoscopy, and expectations must be moderated.

Keywords: equipment, laryngeal masks; equipment, LMA CTrachTM; intubation, endotracheal.
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