Learning Track:
1. General Anaesthesiology
Title:
The effectiveness of the tests used for predicting intubation difficulty and the use of McGrath Videolaryngoscope in cases BMI >30 kg/m2
Author(s):
Basar H., Baltaci B., Cakirca M., Bedevi R.
Institute(s):
Ankara Training and Research Hospital, Dept of Anaesthesiology, Ankara, Turkey
Text:
Background and Goal of Study: In this study it is aimed to evaluate the effectiveness of the tests which are used to determine the difficulty of intubation and to evaluate the effectiveness of McGrath Videolaryngoscopy in obese patients (BMI >30kg/m2) undergoing elective surgery.
Materials and Methods: ASA I-III one hundred patients, aged above 18 years, which are undergoing elective surgery and endotracheal intubation was included into the study with informed consent after approval from Ankara Training and Research Hospital Training Planning Committee (date-number of approval:10.02.2016 - 628, approval reference:5262).
Mallampati test and required measurements were done in the operating room. Which include height, weight, neck circumference, thyromental distance, sternomental distance and mouth opening. It was also evaluated the association height to neck circumference ratio with intubation.
Cormack-Lehane classification was evaluated with Macintosh Laryngoscope following anesthesia induction and mask ventilation of three minutes. Thereafter mask ventilation was continued. Cormack-Lehane classification evaluated again with McGrath Videolaryngoscope by a second anesthetist and then endotracheal intubation was performed.
Duration of intubation and the number of attempts were recorded. Intubation Difficulty Scale (IDS) was used to evaluate the difficulty of intubation.
Descriptive statistics was showed as mean ± standard deviations. T-test, Mann-Whitney U test, Kruskal Wallis and Wilcoxon test was used for analysis. P < 0,05 was accepted as statistically significant.
Results and Discussion: Difficult intubation according to IDS scoring (IDS > 5) was not seen in our study. A significant positive correlation was found between Mallampati classification, Cormack-Lehane classification and neck circumference and the duration of intubation. A significant negative correlation was found between height to neck circumference ratio and the mouth opening and the duration of intubation.
Conclusion(s): In this study, it is found that videolaryngoscopy is effective in obese patients and height to neck circumference ratio may be used to predict difficult intubation. More studies needed to test the effectiveness of height to neck circumference ratio for predicting difficult intubation.

The effectiveness of the tests used for predicting intubation difficulty and the use of McGrath Videolaryngoscope in cases BMI &gt;30 kg/m2

The effectiveness of the tests used for predicting intubation difficulty and the use of McGrath Videolaryngoscope in cases BMI >30 kg/m2