Document Detail

In cadavers, directly measured mucosal pressures are similar for the Unique and the Soft Seal laryngeal mask airway devices.
MedLine Citation:
PMID:  15470175     Owner:  NLM     Status:  MEDLINE    
PURPOSE: We compare the Soft Seal and Unique single-use, plastic laryngeal mask airway devices with respect to intracuff pressure, directly measured mucosal pressure and in vitro elastance. METHODS: Ten fresh male cadavers were studied. Microchip pressure sensors were attached to the following locations: A) the anterior middle part of the cuff side; B) the posterior tip of the cuff; C) the anterior base of the cuff; D) the posterior middle part of the cuff side; E) the backplate; and F) the posterior tube. The size 5 Unique and size 5 Soft Seal were inserted in random order using laryngoscope-guidance. Intracuff pressure and mucosal pressure were documented at 0 to 40 mL cuff volume in 10 mL increments. In vitro elastance was determined between 20 to 40 mL cuff volume. RESULTS: For both devices, mucosal pressure increased with cuff volume at most locations. Intracuff pressures and in vitro elastance (5.2 +/- 0.7 cm H(2)O/mL vs 3.8 +/- 0.4 cm H(2)O/mL, P < 0.0001) were higher for the Unique than the Soft Seal (P < 0.0001), but there were no differences in mucosal pressures at any location or cuff volume. CONCLUSION: Intracuff pressures and in vitro elastance are higher for the Unique than the Soft Seal, but mucosal pressures are similar suggesting that the airway morbidity will be similar.
Christian Keller; Joseph Brimacombe; Bernhard Moriggl; Philipp Lirk; Achim von Goedecke
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; In Vitro; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Canadian journal of anaesthesia = Journal canadien d'anesthésie     Volume:  51     ISSN:  0832-610X     ISO Abbreviation:  Can J Anaesth     Publication Date:  2004 Oct 
Date Detail:
Created Date:  2004-10-07     Completed Date:  2005-03-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8701709     Medline TA:  Can J Anaesth     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  834-7     Citation Subset:  IM    
Department of Anaesthesia and Intensive Care, Cairns Base Hospital, The Esplanade, Cairns 4870, Australia.
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MeSH Terms
Aged, 80 and over
Chi-Square Distribution
Equipment Design
Intubation, Intratracheal / instrumentation*
Laryngeal Masks / standards*
Middle Aged

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