Difficult Airway Characteristics Associated with First-Attempt Failure at Intubation Using Video Laryngoscopy in the...

Area of Science:

• Critical Care Medicine
• Anesthesiology
• Emergency Medicine

Background:

• Video laryngoscopy facilitates tracheal tube placement by eliminating the need for direct alignment of airway axes.
• Despite its advantages, first-attempt intubation failures remain a significant challenge in critical care settings.
• Limited data exists on patient-specific anatomical factors contributing to video laryngoscopy failure in critically ill patients.

Purpose of the Study:

• To identify anatomical and clinical characteristics associated with first-attempt intubation failure using video laryngoscopy in the intensive care unit (ICU).

Main Methods:

• An observational study involving 906 consecutive patients undergoing video laryngoscopy in a single-center academic medical ICU.
• Data collected included difficult airway characteristics, device used, and intubation outcomes.
• Multivariable logistic regression models were used to identify factors associated with first-attempt failure.

Main Results:

• First-attempt failure was not significantly associated with patient sex, age, or reason for intubation.
• Factors significantly associated with first-attempt failure included blood in the airway (OR, 2.63), airway edema (OR, 2.85), and obesity (OR, 1.59).
• In a subset analysis, cervical immobility (OR, 3.34) also emerged as a significant factor associated with first-attempt failure.

Conclusions:

• Blood in the airway, airway edema, cervical immobility, and obesity are independently associated with an increased likelihood of first-attempt intubation failure with video laryngoscopy in the ICU.
• These findings highlight specific patient characteristics that may predict difficult intubation, even with advanced laryngoscopy techniques.
• Further research may focus on strategies to mitigate these risks and improve first-attempt success rates in critically ill patients.