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Completed

NCT Number: NCT02474394

Effects of Videolaryngoscope on Intraocular Pressure

This study is designed to compare the effects of the McGrath Series 5 video laryngoscope and Macintosh laryngoscope on intraocular pressure during laryngoscopy.

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Key information

Conditions

Intubation Complication

Age range

18 year–60 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

Gaziosmanpasa University Medical School

Tokat Province, 60100, Turkey (Türkiye)

About this study

The stability of the intraocular pressure plays an important role during ophthalmic surgery. The systemic blood pressure, aqueous humor dynamics, choroidal blood volume, central venous pressure, extra-ocular muscle tone, and also conventional laryngoscopy affect the intraocular pressure.It was shown that the new devices for laryngoscopy, such as video laryngoscopes provide minimal hemodynamic changes when compared to direct laryngoscopes. However there is no current data about the effects of the intubation with McGrath videolaryngoscope on intraocular pressure. The main objective of this study to compare the effects of the McGrath Series 5 video laryngoscope and Macintosh laryngoscope on intraocular pressure during laryngoscopy.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • American society of anesthesiologist physical status I
  • Non-ophthalmic elective surgery under general anesthesia

Exclusion criteria

  • A history of pre-existing glaucoma or previous intraocular surgery
  • Thyromental distance below 6cm
  • Maximum mouth opening below 3cm
  • Mallampati score of III or IV
  • Pre-anesthetic intraocular pressure above 20 mmHg
  • Number of intubation attempts more than 2
  • Obstetric or laparoscopic surgery

Treatment and study plan

Mcgrath

Device

The patient will be intubated using McGrath series 5 video laryngoscope and the intraocular pressure of the patient will be evaluated with Tonopen XL tonometer

Other names: videolaryngoscope

Macintosh

Device

The patient will be intubated using Macintosh laryngoscope and the intraocular pressure of the patient will be evaluated with Tonopen XL tonometer

Other names: Conventional Laryngoscope

Primary outcomes

  1. Intraocular pressure

    Time frame: during laryngoscopy

    The intraocular pressure measurement will be performed using a Tono-Pen XL tonometer (Reichert Inc., USA) by an ophthalmologist who is blind to the intubation device used.

Sponsors and collaborators

Lead sponsor

Tokat Gaziosmanpasa University

Other

Registry information

Official study title

The Comparison of the Effects of McGrath Video Laryngoscope and the Macintosh Laryngoscope on Intraocular Pressure: A Randomized Trial

Important dates

Study start
2013
Primary completion
2015
Study completion
2015
First posted
Jun 17, 2015
Registry last updated
Jun 26, 2015

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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