Effects of Videolaryngoscope on Intraocular Pressure

June 25, 2015 updated by: Tuğba Karaman, Tokat Gaziosmanpasa University

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

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

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

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.

Study Type

Interventional

Enrollment (Actual)

80

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Turkey
      • Tokat, Turkey, 60100
        • Gaziosmanpasa University Medical School

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 60 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Screening
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Mcgrath
The endotracheal intubation will be provided using Mcgrath series 5 video laryngoscope
Device: Mcgrath
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
Active Comparator: Macintosh
The endotracheal incubation will be provided using macintosh laryngoscope
Device: Macintosh
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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
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.
during laryngoscopy

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Tokat Gaziosmanpasa University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

February 1, 2013

Primary Completion (Actual)

June 1, 2015

Study Completion (Actual)

June 1, 2015

Study Registration Dates

First Submitted

June 15, 2015

First Submitted That Met QC Criteria

June 16, 2015

First Posted (Estimate)

June 17, 2015

Study Record Updates

Last Update Posted (Estimate)

June 26, 2015

Last Update Submitted That Met QC Criteria

June 25, 2015

Last Verified

June 1, 2015

More Information

Terms related to this study

Other Study ID Numbers

  • IOP-1

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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