Abstract
Purpose
The Airway Cam§ is a head-mounted direct laryngoscopy video system which uses a prismatic sighting system that aligns with the operator’s line of sight. This study evaluated intra- and inter-observer consistency in laryngoscopy grading comparing direct laryngoscopy to the laryngoscopy grade obtained with the Airway Cam§.
Methods
Twenty-seven patients receiving a general anesthetic for elective surgery had laryngoscopy performed by an anesthesiologist wearing the Airway Cam§. Each video was duplicated, then randomized and reviewed in a blinded fashion by the original laryngoscopist and a second anesthesiologist. Intra- and inter-observer correlations were identified.
Results
There was good intra-observer agreement of the Cormack-Lehane scale between direct laryngoscopy and laryn-goscopy recorded with the Airway Cam§ (κ = 0.63). The corresponding intra-observer correlation of the percentage of glottic opening score was strong at r = 0.83. There was good inter-observer agreement of the Cormack-Lehane scale between direct laryngoscopy and that observed by the second anesthesiologist during Airway Cam§ video review (κ = 0.70). There was moderate correlation of the inter-observer percentage of glottic opening scores (r = 0.73).
Conclusion
This study validates that the view recorded by the Airway Cam§ reflects the view of the laryngoscopist. The Airway Cam§ may introduce an additional level of objectivity into airway management research and teaching.
Résumé
Objectif
Le Airway Cam§ est un système vidéo de laryngoscopie directe monté sur casque qui utilise un système de vision prismatique qui s’aligne sur la vision de ľopérateur. Nous avons évalué la cohérence intra-observateur et inter-observateur pour classifier la laryngoscopie en comparant la laryngoscopie directe au grade de laryngoscopie obtenue avec le Airway Cam§.
Méthode
Vingt-sept patients recevant une anesthésie générale pour une opération réglée ont subi une laryngoscopie par un anesthésiologiste portant un Airway Cam§. Chaque vidéo a été dupliquée, puis randomisée et revue de façon objective par ľexaminateur et un second anesthésiologiste. Les corrélations intra-observateur et inter-observateur ont été déterminées.
Résultats
II y a eu une bonne concordance intra-observateur de ľéchelle de Cormack-Lehane entre la laryngoscopie directe et ľenregistrement du Airway Cam§ (κ = 0,63). La corrélation intra-observateur correspondante du pourcentage ďouverture glottique a été importante à r = 0,83. II y a eu une bonne concordance interobservateur à ľéchelle de Cormack-Lehane entre la laryngoscopie directe et ľobservation par le second anesthésiologiste pendant la revue vidéo du Airway Cam§ (κ = 0,70). II y a eu une corrélation modérée du pourcentage inter-observateur des scores ďouverture glottique (r = 0,73).
Conclusion
Cette étude certifie que la vision enregistrée par le Airway Cam§ correspond à la vision de ľexaminateur. Le Airway Cam§ peut ajouter un degré ďobjectivité à la recherche sur le contrôle des voies aériennes et à son enseignement.
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George, R.B., McKeen, D. & Law, J.A. Laryngoscopic evaluation with the Airway Cam§ laryngoscopy video system. Can J Anesth 53, 512–515 (2006). https://doi.org/10.1007/BF03022626
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DOI: https://doi.org/10.1007/BF03022626