ArticleCureus2021
Study of Changes in Optic Nerve Sheath Diameter Following Tracheal Intubation Using Macintosh Laryngoscope or Fibreoptic-Guided Intubation Through Ambu Aura-I: A Randomised Controlled Study.
Article in Cureus, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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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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Who cites it
1 citing paper in PubMed, 2 citations in OpenAlex.
- The effects of prone position on optic nerve sheath diameter and intraocular pressure in elective lumbar disc surgery.BMC anesthesiology · 2025Observational
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundNeuroanaesthesiologists are faced with managing and optimising the intracranial pressure in the perioperative period. Laryngoscopy and tracheal intubation are known to increase sympathetic activity that is well tolerated by healthy patients but may be detrimental to many comorbid patients. We, therefore, hypothesised that airway management and tracheal intubation through Ambu Aura-I (Ambu, Baltorpbakken 13, Denmark) may be associated with lesser changes in optic nerve sheath diameter (ONSD) compared to conventional tracheal intubation and designed a study to ultrasonographically measure the changes in optic nerve sheath diameter following tracheal intubation using Macintosh laryngoscope or fibreoptic-guided intubation through Ambu Aura-I in patients receiving endotracheal anaesthesia. MATERIAL AND
methodsThis randomised controlled hospital-based clinical study was conducted on 60 patients divided into two groups: group 1 (n=30, tracheal intubation facilitated by direct laryngoscopy with Macintosh laryngoscope) or group 2 (n=30, fibreoptic-guided tracheal intubation through Ambu Aura-I), undergoing elective surgery under general anaesthesia requiring tracheal intubation.
resultsBaseline parameters before induction of anaesthesia were recorded for further comparison. Baseline ONSD at 3 mm behind the globe in both eyes (before induction of anaesthesia), both in transverse and the coronal plane, was measured by transorbital sonography with the patient lying in the supine position using a portable Sonosite Turbo-M ultrasonography (Fujifilm Sonosite, Bothell, USA) machine. End-tidal carbon dioxide concentration (EtCO
conclusionWe conclude that fibreoptic-guided tracheal intubation through Ambu Aura-I is not superior to tracheal intubation using direct laryngoscopy with Macintosh laryngoscope in terms of its effect on intracranial pressure, as measured ultrasonographically by optic nerve sheath diameter.
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