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Effectiveness and Safety of the Levitan Scope for Laryngoscopy and Tracheal Intubation With a Simulated Difficult Airway

This study has been completed.
Information provided by (Responsible Party):
Ronald George, IWK Health Centre Identifier:
First received: December 12, 2011
Last updated: October 30, 2012
Last verified: October 2012

A laryngoscope is a medical instrument that is used to get a view of the voice box and the space in between the vocal cords. A laryngoscope is used to place a breathing tube into the trachea (windpipe or airway) to protect the patient's airway and provide a way to help a person breathe during surgery; this is called intubation. The placement of a breathing tube into the windpipe is a skill that is not easily mastered. In fact, the placement is difficult or impossible using the usual technique in 1-3 of every 100 patients. The ease of placing this breathing tube depends in part on how easily and how much of the vocal cords are able to be seen directly using a laryngoscope.

In a small number of patients, the Levitan First Pass Success (FPS) Scope has been shown to be more effective and easier to insert even in patients who have difficult airways. This study will evaluate the use of the LFS compared to the other conventional laryngoscope in subjects with a simulated difficult airway. The goal of this study is to determine the effectiveness and safety of the LFS in a large number of patients with simulated airway difficulties.

The results obtained during the study may provide useful information to health care providers who cannot place a breathing tube in patients that are either in operating rooms or in emergency situations requiring intubation by paramedics. An example would be a trauma situation where a paramedic is having difficulty attempting an intubation when a patients c-spine is being protected from any movements.

The LFS is an affordable and transportable device, which makes this an attractive asset for health providers in smaller community settings or in paramedic vehicles which may not have the capacity to stock or ability to afford a variety of different scopes and must choose a more limited selection.

Condition Intervention Phase
Device: Levitan
Device: MAC
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Crossover Assignment
Masking: Single Blind (Subject)
Primary Purpose: Treatment
Official Title: Effectiveness and Safety of the Levitan FPS Scope for Laryngoscopy and Tracheal Intubation With a Simulated Difficult Airway in Surgical Subjects Under General Anesthesia

Further study details as provided by IWK Health Centre:

Primary Outcome Measures:
  • laryngoscopy view grading [ Time Frame: intraoperative ] [ Designated as safety issue: No ]
    during intubation

Secondary Outcome Measures:
  • number of intubation attempts [ Time Frame: intraoperative ] [ Designated as safety issue: No ]
    during intubation

  • operator rating of difficulty [ Time Frame: intraoperative ] [ Designated as safety issue: No ]
    during intubation

  • time ot successful intubation [ Time Frame: intraoperative ] [ Designated as safety issue: No ]
    during intubation

Enrollment: 105
Study Start Date: July 2009
Study Completion Date: July 2010
Primary Completion Date: July 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Levitan
Intubation with Levitan
Device: Levitan
Active Comparator: MAC
traditional MAC intubation
Device: MAC


Ages Eligible for Study:   16 Years to 75 Years
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. American Society of Anesthesiologists (ASA) physical status I or II (healthy or mild systemic disease, ex. asthma, high blood pressure)
  2. Elective surgery requiring endotracheal intubation
  3. English speaking
  4. Age 16 - 75 years

Exclusion Criteria:

  1. Significant gastroesophageal reflux disease (GERD) that may require alternate induction/intubation techniques
  2. Prior history of a difficult intubation requiring an awake tracheal intubation
  3. Clinical predictors of a potentially difficult intubation requiring an awake intubation
  4. BMI > 45 kg/m2 (Obesity is a common and important risk factor for difficult intubation)
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

No Contacts or Locations Provided
  More Information

No publications provided

Responsible Party: Ronald George, Primary Investigator, MD, FRCPC, Assistant Professor, IWK Health Centre Identifier: NCT01491984     History of Changes
Other Study ID Numbers: IWK-4668-2009, IWK REB 4668
Study First Received: December 12, 2011
Last Updated: October 30, 2012
Health Authority: Canada: Health Canada processed this record on March 03, 2015