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Evaluation of the new Viewmax laryngoscope in a simulated difficult airway.
Acta Anaesthesiol Scand. 2006 May; 50(5):562-7.AA

Abstract

BACKGROUND

In this study, we evaluated the learning curve and performance of the Viewmax laryngoscope during simulated difficult laryngoscopy in an intubation manikin (Laerdal Airway Management Trainer).

METHODS

To determine the learning curve, 25 anaesthesiologists without previous experience with the Viewmax laryngoscope performed 10 successive intubations in an intubation manikin with a normal airway. Time to intubation and failed intubation attempts were recorded. Another manikin was modified to enable comparison of the Viewmax laryngoscope with Macintosh and McCoy laryngoscopes. The time to intubation, number of failed intubation attempts, modified Cormack and Lehane (MCL) laryngeal view grading, percentage of glottic opening (POGO score), use of gum elastic bougie and subjective rating of degree of difficulty were recorded.

RESULTS

The learning curve for the Viewmax laryngoscope showed a progressive decrease in time to successful intubation and reached a plateau at the sixth attempt. In simulated difficult laryngoscopy, the Viewmax laryngoscope demonstrated significantly better laryngeal view than the Macintosh and McCoy laryngoscopes in terms of MCL grading (Macintosh, P = 0.01; McCoy, P < 0.01) and POGO score (Macintosh, P < 0.01; McCoy, P < 0.01). The time required for intubation in simulated difficult laryngoscopy for the Viewmax laryngoscope was significantly longer than that for the Macintosh (P = 0.02) and McCoy (P < 0.01) laryngoscopes. There was no significant difference in the degree of difficulty, number of failed intubations and use of gum elastic bougie.

CONCLUSION

When compared with the Macintosh and McCoy laryngoscopes in a manikin, the Viewmax laryngoscope appears to improve the view of the larynx but requires a longer time for tracheal intubation.

Authors+Show Affiliations

Department of Anaesthesiology, Queen Elizabeth Hospital, Kowloon, Hong Kong. qehanaesthesia@gmail.comNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article

Language

eng

PubMed ID

16643225

Citation

Leung, Y Y., et al. "Evaluation of the New Viewmax Laryngoscope in a Simulated Difficult Airway." Acta Anaesthesiologica Scandinavica, vol. 50, no. 5, 2006, pp. 562-7.
Leung YY, Hung CT, Tan ST. Evaluation of the new Viewmax laryngoscope in a simulated difficult airway. Acta Anaesthesiol Scand. 2006;50(5):562-7.
Leung, Y. Y., Hung, C. T., & Tan, S. T. (2006). Evaluation of the new Viewmax laryngoscope in a simulated difficult airway. Acta Anaesthesiologica Scandinavica, 50(5), 562-7.
Leung YY, Hung CT, Tan ST. Evaluation of the New Viewmax Laryngoscope in a Simulated Difficult Airway. Acta Anaesthesiol Scand. 2006;50(5):562-7. PubMed PMID: 16643225.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of the new Viewmax laryngoscope in a simulated difficult airway. AU - Leung,Y Y, AU - Hung,C T, AU - Tan,S T, PY - 2006/4/29/pubmed PY - 2006/12/9/medline PY - 2006/4/29/entrez SP - 562 EP - 7 JF - Acta anaesthesiologica Scandinavica JO - Acta Anaesthesiol Scand VL - 50 IS - 5 N2 - BACKGROUND: In this study, we evaluated the learning curve and performance of the Viewmax laryngoscope during simulated difficult laryngoscopy in an intubation manikin (Laerdal Airway Management Trainer). METHODS: To determine the learning curve, 25 anaesthesiologists without previous experience with the Viewmax laryngoscope performed 10 successive intubations in an intubation manikin with a normal airway. Time to intubation and failed intubation attempts were recorded. Another manikin was modified to enable comparison of the Viewmax laryngoscope with Macintosh and McCoy laryngoscopes. The time to intubation, number of failed intubation attempts, modified Cormack and Lehane (MCL) laryngeal view grading, percentage of glottic opening (POGO score), use of gum elastic bougie and subjective rating of degree of difficulty were recorded. RESULTS: The learning curve for the Viewmax laryngoscope showed a progressive decrease in time to successful intubation and reached a plateau at the sixth attempt. In simulated difficult laryngoscopy, the Viewmax laryngoscope demonstrated significantly better laryngeal view than the Macintosh and McCoy laryngoscopes in terms of MCL grading (Macintosh, P = 0.01; McCoy, P < 0.01) and POGO score (Macintosh, P < 0.01; McCoy, P < 0.01). The time required for intubation in simulated difficult laryngoscopy for the Viewmax laryngoscope was significantly longer than that for the Macintosh (P = 0.02) and McCoy (P < 0.01) laryngoscopes. There was no significant difference in the degree of difficulty, number of failed intubations and use of gum elastic bougie. CONCLUSION: When compared with the Macintosh and McCoy laryngoscopes in a manikin, the Viewmax laryngoscope appears to improve the view of the larynx but requires a longer time for tracheal intubation. SN - 0001-5172 UR - https://www.unboundmedicine.com/medline/citation/16643225/Evaluation_of_the_new_Viewmax_laryngoscope_in_a_simulated_difficult_airway_ DB - PRIME DP - Unbound Medicine ER -
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