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Completed

NCT Number: NCT01824914

Airway Evaluation by McGrath Videolaryngoscope

Difficult tracheal intubation is a cause of severe patient damage and death. There is not a good method to predict it. The McGrath Series 5 video laryngoscope can improve visualization of the glottic structures one to two grades. Moreover unlike a classical laryngoscope with a Macintosh blade, the McGrath provides a view of the glottis without requiring alignment of the oral, pharyngeal and laryngeal axes. In this study, the investigators will use it to compare the Cormack-Lehane score in sedation and anesthesia condition. It helps to know the role of videolaryngoscope in predicting difficult intubation.

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Key information

Conditions

Anesthesia

Age range

15 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Tongji Hospital, Huazhong University of Science and Technology

Wuhan, Hubei, 430030, China

About this study

  • The enrolled patients were given a bolus of sufentanil 0.3-0.5μg/kg to achieve Ramsay sedation score 2-3. The Cormack-Lehane score in sedation was evaluated by McGrath videolaryngoscope.
  • Then the patients were induced with propofol. A bolus of rocuronium was given to facilitate intubation. The Cormack-Lehane score in anesthesia was recorded when intubated by McGrath videolaryngoscope.
  • BMI, mouth opening, thyromental distance, intubation duration and ramsay sedation score were also recorded.
  • To compare the Cormack-Lehane score in sedate and anesthesia condition

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • patients scheduled for general surgery under general anesthesia
  • ASA classification 1-3

Exclusion criteria

  • emergent operation, aspiration risk
  • a history of difficult airway
  • expected difficult airway
  • incooperative patients with mental diseases, hearing disorders

Treatment and study plan

McGrath videolaryngoscope

Device

A kind of portable videolaryngoscopes, produced by Aircraft Medical. It has been used for difficult airway.

Primary outcomes

  1. Cormack-Lehane score in sedation condition

    Time frame: 5 minutes after administration of sufentanil

    Based on the Modified Cormack-Lehane classification. 5 degrades. 1-5

  2. Cormack-lehane score in anesthesia condition

    Time frame: 1 minute after administration of rocuronium

    Based on the Modified Cormack-Lehane classification. 5 degrades. 1-5

Secondary outcomes

  1. Duration of intubation

    Time frame: At intubation

    The duration of intubation is defined as the time from inserting videolaryngoscope, intubating a tube, to withdrawing videolaryngoscope using a stopwatch.

  2. Sedation score

    Time frame: 5 minutes after administraion of sufentanil

    by Ramsay sedation score 1-6. The higher score, the deeper sedation

Other outcomes

  1. BMI

    Time frame: One day before operation

  2. Thyromental distance

    Time frame: One day before operation

    measuring with a ruler

  3. Mallampati classification

    Time frame: One day before operation

    4 degrades

  4. Mouth opening

    Time frame: One day before operation

    measuring with a ruler

Sponsors and collaborators

Lead sponsor

Huazhong University of Science and Technology

Other

Registry information

Official study title

Comparison of Cormack-Lehane Score in Sedation and Anesthesia Condition by McGrath Videolaryngoscope

Important dates

Study start
2013
Primary completion
2013
Study completion
2013
First posted
Apr 5, 2013
Registry last updated
Nov 7, 2014

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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