ArticleIndian journal of anaesthesia2023
Comparison of intubating conditions in supine (sniffing) and 25° back-up position using channelled and non-channelled video laryngoscopes - A randomised controlled study.
Article in Indian journal of anaesthesia, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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1 citing paper in PubMed, 2 citations in OpenAlex.
- Ramped versus sniffing position for videolaryngoscopy-guided tracheal intubation in adult patients: A systematic review and meta-analysis with trial sequential analysis.Indian journal of anaesthesia · 2025Article
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Authors and funding
3 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Background and Aims: The 25°back-up position is proposed to increase the efficacy of preoxygenation and provide better tracheal intubating conditions when using a direct laryngoscope. This study aimed to compare the ease of tracheal intubation between supine and 25° back-up positions when using two video laryngoscopes (VLS). Methods: One hundred adults with normal airways and belonging to the American Society of Anesthesiologists physical status classes I and II, requiring general anaesthesia, were randomised in groups K and M. The trachea was intubated using King Vision and McGrath VLS in either supine (groups K1 and M1) or 25° back-up (groups K2 and M2) positions. The 25° backup position was given by raising the operating table from the horizontal position by flexing the torso at the hips so that an imaginary line connected the patient's external auditory meatus to the sternal notch. Modified Intubation Difficulty Scale (mIDS) was the primary outcome, and intubation time, the number of intubation attempts, vital parameters, and complications were compared secondarily. Statistical analysis was done using MedCalc software by applying an independent Result: Mean (Standard deviation) mIDS was significantly reduced using both VLS in the 25° back-up position [0.92 (0.75) versus 0.48 (0.58), Conclusion: The 25° backup position helps provide ease of intubation using both the channelled (King Vision) and non-channelled (McGrath) VLS.
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