Video laryngoscopy

(Redirected from Video Laryngoscopy)

Overview

Oral cavity and oropharynx.
Sagittal section through the head and neck showing the subdivisions of the pharynx.
External views of the larynx: (a) anterior aspect; (b) anterolateral aspect with the thyroid gland and cricothyroid ligament removed.
The cartilages and ligaments of the larynx seen posteriorly.
Larynx as visualized from the hypopharynx.
  • Two most common devices are the C-MAC and the Glidescope[1]
    • Both CMAC and Glidescope systems offer both hyperangulated and standard geometry blades
  • Increasingly utilized in emergency airway management[2]

Indications

Contraindications

  • No absolute contraindications
  • Relative:
    • Blood or emesis in airway
    • Foreign body removal

Equipment Needed

  • Video laryngoscope
  • Rigid stylet if hyperangulated blade is used
  • All other equipment necessary for endotracheal intubation

Procedure

Hyperangulated blade and rigid stylet typical of the Glidescope video laryngoscope
The C-MAC video laryngoscope (pictured above) has a Macintosh or "standard geometry" blade similar to that of a Macintosh direct laryngoscope (pictured below).
  • Hyperangulated video laryngoscope
    • Patient ideally in neutral spine position (as opposed to "sniffing" position for direct laryngoscopy)
    • After induction, use right hand to "scissor" mouth open
    • Place hyperangulated blade midline and slowly advance with progressive identification of airway landmarks
    • Advance blade into vallecula
    • When cords fill entire screen (Cormack-Lehane Grade I), slightly retract laryngoscopy so that cords only occupy upper 1/3 of screen (CL Grade II, allows for passage of ETT with rigid stylet)[3]
      • If intubation is attempted with the best view possible, operators often have difficulty advancing the tube around the tongue and hypopharyngeal soft tissues
  • Standard geometry video laryngoscope
    • Same technique utilized with direct laryngoscopy
    • Can either visualize directly or utilize video screen for tube delivery

Complications

  • Risk of equipment failure with hyperangulated laryngoscope (unable to obtain direct view if screen fails)
  • Risk of camera contamination with blood or emesis in airway
  • Foreign body removal with hyperangulated laryngoscope less successful than with Macintosh laryngoscope [4]

See Also

Airway Pages

External Links

References

  1. ↑ Peterson K, Ginglen JG, Valenzuela FI, et al. Direct Laryngoscopy. [Updated 2020 Mar 31]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2020 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK513224/[Category:Procedures]]
  2. ↑ Brown CA 3rd, Bair AE, Pallin DJ, Walls RM; NEAR III Investigators. Techniques, success, and adverse events of emergency department adult intubations [published correction appears in Ann Emerg Med. 2017 May;69(5):540]. Ann Emerg Med. 2015;65(4):363-370.e1. doi:10.1016/j.annemergmed.2014.10.036
  3. ↑ Gu Y, Robert J, Kovacs G, et al. A deliberately restricted laryngeal view with the GlideScope® video laryngoscope is associated with faster and easier tracheal intubation when compared with a full glottic view: a randomized clinical trial. Une vue laryngée délibérément restreinte à l'aide du vidéolaryngoscope GlideScope® est associée à une intubation trachéale plus rapide et plus aisée qu'une vue glottique totale: une étude clinique randomisée. Can J Anaesth. 2016;63(8):928-937. doi:10.1007/s12630-016-0654-6
  4. ↑ Je, S. M., Kim, M. J., Chung, S. P., & Chung, H. S. (2012). Comparison of GlideScope® versus Macintosh laryngoscope for the removal of a hypopharyngeal foreign body: A randomized cross-over cadaver study. Resuscitation, 83(10), 1277–1280.
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