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.
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
105
Laryngoscopy with MAC, then Levitan
Laryngoscopy with Levitan, then MAC
Cormack-Lehane Grade
The anesthesiologist graded the laryngeal view after induction of anesthesia using Cormack-Lehane Scale. Grade 1 = full view of glottis Grade 2a = partial view of glottis Grade 2b = Only posterior extremity of glottis seen or only arytenoid cartilages Grade 3 = Only epiglottis seen, none of glottis seen Grade 4 = Neither glottis nor epiglottis seen
Time frame: intraoperative
Number of Intubation Attempts
Number of intubation attempts was recorded after intubation was completed.
Time frame: intraoperative
Operator Rating of Difficulty
The attending anesthesiologist rated the difficulty in using each technique to intubate the larynx using an 11-point numeric rating scale and a 4-point visual rating scale.
Time frame: intraoperative
Time to Successful Intubation
Time to successful intubation was documented during the second laryngoscopy and defined as the time from the insertion of the Macintosh laryngoscope into the oral cavity to its removal.
Time frame: intraoperative
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