Randomized, Comparison Trial of Video vs. Standard Laryngoscope

This data set contains 99 adult patients with a body mass index between 30 and 50 kg/m2 who required orotracheal intubation for elective surgery. Patient demographics, airway assessment data, intubation success rate, time to intubation, ease of intubation, and occurrence of complications were recorded. The dataset is cleaned and complete. There are no outliers or data problems (more details available below the variable definitions).

Usage

laryngoscope

Format

A data frame with 99 observations and 22 variables

age

Age (years), numeric, range: 20-77

gender

Gender, numeric, 0 = female; 1 = male

asa

American Society of Anesthesiologists physical status(1-4), range: 2-4

BMI

Body Mass Index (kg/m^2), numeric, range: 31-61

Mallampati

Mallampati score predicting ease of intubation 1 = Full visibility of tonsils, uvula and soft palate (easy intubation); 2 = Visibility of hard and soft palate, upper portion of tonsils and uvula; 3 = Soft and hard palate and base of the uvula are visible; 4 = Only Hard Palate visible (difficult intubation), numeric, range: 1-4

Randomization

Laryngoscope randomized, numeric, range: 0 = Standard Macintosh #4, 1 = AWS Pentaz Video

attempt1_time

First intubation attempt time (seconds), numeric, range: 9-113

attempt1_S_F

Successful intubation first attempt, numeric, 0 = no, 1 = yes

attempt2_time

Second intubation attempt time (seconds), numeric, range: 11- 60

attempt2_assigned_method

Second intubation attempt made with assigned laryngoscope, numeric, 0 = no, 1 = yes

attempt2_S_F

Successful intubation second attempt, numeric, 0 = no, 1 = yes, numeric, range: 0 = no, 1 = yes

attempt3_time

Third intubation attempt time (seconds), numeric, range: 15- 30

attempt3_assigned_method

Third intubation attempt made with assigned laryngoscope, numeric, 0 = no, 1 = yes

attempt3_S_F

Successful intubation third attempt, numeric, 0 = no, 1 = yes, numeric, range: 1-1

attempts

Number of intubation attempts, numeric, range: 1-3

failures

Number of intubation failures, numeric, range: 0-2

total_intubation_time

Total Intubation time (second), numeric, range: 9-100

intubation_overall_S_F

Overall successful intubation, numeric, 0 = no, 1 = yes

bleeding

Bleeding (trace), numeric, 0 = no, 1 = yes

ease

Ease of tracheal intubation, 0 = extremely easy to 100 = extremely difficult, numeric, range: 0-100

sore_throat

Severity of postoperative sore throat, 0 = none; 1 = mild; 2 = moderate; 3 = severe, numeric, range: 0- 3

view

Cormack-Lehane grade of glottic view 0 = "not good" Cormack- Lehane grade 1 or 2; 1 = "good" Cormack-Lehane grade 3 or 4, numeric, range: 0- 1

Source

These are data from a study by Abdallah et al. A Randomized Comparison between the Pentax AWS Video Laryngoscope and the Macintosh Laryngoscope in Morbidly Obese Patients. Anesthesia Analgesia 2011; 113: 1082-7.

Details

The Laryngoscope dataset was contributed by Dr. Amy Nowacki, Associate Professor, Cleveland Clinic. Please refer to this resource as: Amy S. Nowacki, 'Laryngoscope Dataset', TSHS Resources Portal (2017). Available at https://www.causeweb.org/tshs/laryngoscope/.
Difficult and failed tracheal intubations are among the principal causes of anesthetic-related mortality and morbidity. Because a good laryngeal view facilitates successful tracheal intubation, new technologies have been introduced to improve visualization. Video laryngoscopes, for example, often use miniature cameras to facilitate visualization of the laryngeal inlet with no need to align the oral, pharyngeal, and tracheal axes.
The Pentax AWS is a novel video laryngoscope, available in Japan since 2006, which is designed to facilitate intubation by providing a video image of the glottis. It incorporates a miniature video camera and a battery-powered, built-in LCD monitor. A disposable blade is attached to the base system. Incorporation of an LCD display makes it possible to view the glottis simultaneously with insertion of the endotracheal tube (ETT). In this regard, it differs from some other video laryngoscope designs that use external monitors. The Pentax AWS also differs in having a side channel that positions and guides the ETT. Reports suggest that the Pentax AWS can help intubate, but randomized data remain sparse.cr This study tested the hypothesis that intubation with the Pentax AWS would be easier and faster than with a standard Macintosh laryngoscope with a #4 blade.