Miller Straight Blade vs Macintosh Blade

Intubation; Difficult Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02664532
• Other study ID #: PR/JHTMH/09242A
• Status: Completed
• Phase: N/A
• First received: January 10, 2016
• Last updated: February 12, 2016
• Start date: January 2010
• Est. completion date: December 2010

Study information

• Verified date: February 2016
• Source: Tata Main Hospital
• Contact: n/a
• Is FDA regulated: No
• Health authority: India: Indian Council of Medical Research
• Study type: Interventional

Clinical Trial Summary

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.

Description:

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 150
• Est. completion date: December 2010
• Est. primary completion date: December 2010
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 18 Years to 70 Years

Eligibility

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

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Open Label

Related Conditions & MeSH terms

• Intubation; Difficult

Intervention

Other:
• Miller group
Miller blade was used for laryngoscopy
• Macintosh group
Macintosh blade was used for laryngoscopy

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
Tata Main Hospital

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Ease of Intubation or Degree of Difficulty With Intubation	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	60 seconds	No
Secondary	Cormack Lehane Grading	Grade 1 Full view of glottis Grade 2 Only posterior commissure visible Grade 3 Only epiglottis visible Grade 4 No glottis structure visible	60 seconds	No
Secondary	Number of Intubation Attempts	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.	180 seconds	No
Secondary	Total Laryngoscopy Duration in 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.	180 seconds	No