Observational studyBMC anesthesiology2020
Evaluation of the effect of the mouth gag use on optic nerve sheath diameter of pediatric patients undergoing tonsillectomy or Adenotonsillectomy: An observational study.
Observational study in BMC anesthesiology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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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.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
8 citing papers in PubMed, 14 citations in OpenAlex.
- Neck extension during thyroidectomy: effects on early postoperative cognitive function and optic nerve sheath diameter- a randomized controlled trial.BMC anesthesiology · 2025Trial
- Effect of Tonsillar Retractor on Intracranial and Intraocular Pressure in Children Undergoing Adenotonsillectomy Surgeries.Laryngoscope investigative otolaryngology · 2026Article
- Observational
- Effect of twin block on intracranial pressure.Clinical oral investigations · 2025Article
- Design of a Novel, Modular, Mouth Retractor: A Concept Testing Study.Acta medica Philippina · 2025Article
- Article
- Optic Nerve Ultrasound Evaluation in Children: A Review.Diagnostics (Basel, Switzerland) · 2023Review
- Less stress, better success: a scoping review on the effects of anxiety on anesthetic and analgesic consumption.Journal of anesthesia · 2022Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundA mouth gag is usually used during tonsillectomy and adenotonsillectomy surgeries, cleft palate repair, obstructive sleep apnea surgery, and intraoral tumor excision. The placement of the gag causes hemodynamic changes similar to laryngoscopy. The aim of this study was to evaluate the effect of mouth gag placement on the optic nerve sheath diameter (ONSD) of pediatric patients. The secondary aim was to assess the relationship between neck extension and changes in ONSD.
methodsThe trial was prospectively registered to the Australian New Zealand Clinical Trials Registry (Trial ID: ACTRN12618000551291) on 12.04.2018. This prospective, observational study was performed in a tertiary university hospital operating room between 01.05.2018-01.07.2018. Thirty-five children aged < 18 years, with ASA I status, who were scheduled for tonsillectomy and adenotonsillectomy surgeries were prospectively included in the study. Measurements of ONSD were performed (T0) after induction of anesthesia, (T1) after endotracheal intubation, (T2) after mouth gag placement, and (T3) 20 min after mouth gag placement. After the mouth gag was placed and the head was positioned for surgery, the degree of neck extension was calculated.
resultsAll participants completed the study. There were significant differences in ONSD values at time points T1, T2, and T3 (p < 0.001, CI: - 0.09,-0.05; p < 0.001, CI: - 0.09,-0.05; p < 0.001, CI: - 0.05,-0.02; respectively). The maximum increase in ONSD was after intubation (0.69 ± 0.06 mm) and immediately after mouth gag placement (0.67 ± 0.07 mm). ONSD values continued to increase 20 min after gag placement (0.36 ± 0.04). There was no relation between the degree of neck extension and ONSD values (β = 0.63, p = 0.715).
conclusionsThe use of a mouth gag causes significant increases in ONSD measurements of children. Therefore, attention to the duration of mouth gag placement should be considered during surgery.
trial registrationThe trial was prospectively registered to the Australian New Zealand Clinical Trials Registry (Trial ID: ACTRN12618000551291 ) on 12.04.2018.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.