Head-elevated laryngoscopy position: improving laryngeal exposure during laryngoscopy by increasing head elevation.

@article{Levitan2003HeadelevatedLP,
  title={Head-elevated laryngoscopy position: improving laryngeal exposure during laryngoscopy by increasing head elevation.},
  author={Richard M. Levitan and C. Crawford Mechem and Edward Andrew Ochroch and Frances S. Shofer and Judd E. Hollander},
  journal={Annals of emergency medicine},
  year={2003},
  volume={41 3},
  pages={
          322-30
        }
}
STUDY OBJECTIVE The objective of this study was to determine the effect of increasing head elevation and neck flexion on the quality of laryngeal view during laryngoscopy. [] Key MethodMETHODS Laryngoscopy with a straight blade was performed on 7 fresh human cadavers. Laryngeal views were recorded with the direct laryngoscopy video system, and the laryngoscopy angle was measured throughout the procedure with an angle finder attached to the handle of the laryngoscope.
Head elevation improves laryngeal exposure with direct laryngoscopy.
Comparison of Laryngoscopic View Obtained by Conventional Head Rise to that Obtained by Horizontal Alignment of External Auditory Meatus and Sternal Notch
TLDR
HELP should be the ideal intubating position in all patients irrespective of ages and sexes with or without predilections for difficult airway and neck circumference as a parameter was more helpful in predicting difficult laryngoscopy compared to BMI.
A Randomized Study Comparing the Sniffing Position with Simple Head Extension for Glottis Visualization and Difficulty in Intubation during Direct Laryngoscopy
TLDR
It is concluded that compared to the simple head extension position, the SP should be used as a standard head position for intubation attempts under general anesthesia.
Laryngeal exposure during laryngoscopy is better in the 25° back-up position than in the supine position
TLDR
During laryngoscopy, the laryngeal view, as assessed by POGO scores, improves significantly in the 25° back-up position when compared with the flat supine position.
Comparison of Sniffing Position and Head-Neck Position for Direct Laryngoscopy
TLDR
Simple head extension position is better than traditional sniffing position with regarding to ease of intubation as found by Intubation Difficulty Scale.
Comparison of ease of intubation in sniffing position and further neck flexion
TLDR
It is concluded that the HE position is superior to standard SP with regard to ease of intubation as assessed by IDS.
Effect of Second Person Aid for Upward Displacement of Laryngoscope on Laryngeal View during Laryngoscopy
TLDR
Assessment of a novel manual technique that enhances the exposing of laryngeal view by upward displacement of laryngoscope during lARYngoscopy indicates that it provides a better larynGEal view for the clinician, making the process of intubation easier and more successful.
Head and Neck Position for Direct Laryngoscopy
TLDR
Analysis of the available literature supports the use of the SP for DL, and a standard definition for the position should be used to avoid confusion about what constitutes a proper SP.
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