Introductory Session to Direct Laryngoscopy and Endotracheal Intubation for Medical Interns: Is Video-laryngoscopy a Useful Teaching Aid?

JOURNAL TITLE: Journal of Research & Innovation in Anesthesia

1. Nagalla Balakrishna
2. Madhavi Singh
3. Sushma Konduri
Publishing Year
Author Affiliations
    1. Dentica Oral Care and Implant Centre Ranchi, Jharkhand India
    1. Department of Anesthesia, Apollo Institute of Medical Sciences and Research, Hyderabad, Telangana, India
    1. Department of Biostatistics, National Institute of Nutrition Hyderabad, Telangana, India
  • Article keywords
    Airway management, Direct laryngoscopy, Endotracheal intubation, Simulation, Video-laryngoscopy


    Aim: Acquisition of basic and advanced airway skills on a mannequin is a well-accepted teaching methodology. To study the impact of video-laryngoscopy-aided identification of airway structures on basic skill acquisition by medical interns for endotracheal intubation (ETI) on a simulator was the aim. Materials and methods: This observational study was conducted in a simulation laboratory. Medical interns were randomized into conventional direct laryngoscopy (DL) and video-laryngoscope aided (VL) groups; they were taught DL and ETI with or without an additional video-laryngoscopy-based session. Participants performed an average of five supervised intubations, subsequent practical exam, and assessed by a blinded observer followed by submission of a structured questionnaire. Results: Eighty interns participated. The mean-time taken to intubate was 48.58 seconds and 48.65 seconds for the DL and VL groups, respectively. success in ETI in the first attempt was 90% (DL) and 87.5% (VL) (p = 0.72). Highest respect toward tissue in the DL group (p = 0.0730) was noted. Conclusion: Addition of video-laryngoscope as a teaching aid in the simulation laboratory did not affect intubation success rate or time. Clinical significance: • Teaching medical and technical skills to students using mannequins is a well-accepted methodology for hands-on experience and attaining proficiency. • Visualization of structures in video-laryngoscopy during endotracheal intubation is assumed to enhance success rate. However, success rate of intubation is independent of the technique used, that is, direct laryngoscopy and video-laryngoscopy. • Tissue respect is superior with direct laryngoscopy.

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