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Completed

NCT Number: NCT02664532

Miller Straight Blade vs Macintosh Blade

The purpose of this prospective open labeled randomized study was to compare the "laryngoscopic glottis view" as well as "ease of intubation" between the two blades in routine intubations in non-difficult airways.

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Key information

Conditions

Intubation; Difficult

Age range

18 year–70 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

About this study

One hundred and fifty patients with predicted non difficult airway were randomly assigned into two groups. After induction of anaesthesia laryngoscopy was performed with respective blades and trachea intubated. Parameters monitored were: glottis view obtained during laryngoscopy (Cormack Lehane grade), ease of intubation, intubation attempts, total duration of laryngoscopy in seconds and encountered complications.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • All ASA I & II grade patients undergoing elective surgery requiring general anesthesia with oral endotracheal intubation

Exclusion criteria

  • Patients with anticipated difficult airway
  • Cervical spine disorders
  • Anesthesia requiring rapid sequence induction

Treatment and study plan

Miller group

Other

Miller blade was used for laryngoscopy

Macintosh group

Other

Macintosh blade was used for laryngoscopy

Primary outcomes

  1. Ease of Intubation or Degree of Difficulty With Intubation

    Time frame: 60 seconds

    Degree of difficulty with intubation Grade 1 Intubation easy Grade 2 Intubation requiring an increased anterior lifting force/optimal external laryngeal manipulation (OELM)/assistance to pull the right corner of the mouth upwards to augment space Grade 3 Intubation requiring more than one attempt or bougie guided intubation Grade 4 failure to intubate with the assigned laryngoscope

Secondary outcomes

  1. Cormack Lehane Grading

    Time frame: 60 seconds

    Grade 1 Full view of glottis Grade 2 Only posterior commissure visible Grade 3 Only epiglottis visible Grade 4 No glottis structure visible

  2. Number of Intubation Attempts

    Time frame: 180 seconds

    An intubation attempt is defined as "intubation activities occurring during a single continuous laryngoscopy maneuver". Thus, even if several attempts were made to place an endotracheal tube during the course of a single laryngoscopy, this would be counted as a single intubation attempt.

  3. Total Laryngoscopy Duration in Seconds

    Time frame: 180 seconds

    The duration of intubation was defined as the time taken from placement of the laryngoscope in the mouth to the time taken to remove the laryngoscope from the mouth following intubation.

Sponsors and collaborators

Lead sponsor

Tata Main Hospital

Other

Registry information

Official study title

Miller Straight Blade With Paraglossal Technique Compared to the Macintosh Blade in Respect to Visualization of Larynx and Ease of Intubation

Important dates

Study start
2010
Primary completion
2010
Study completion
2010
First posted
Jan 27, 2016
Registry last updated
Mar 11, 2016

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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