A difficult airway is a clinical condition that occurs when one or more of the components of difficult mask ventilation, difficult laryngoscopy, difficult endotracheal intubation, difficult supraglottic airway device (SGA) placement, and inability to intubate-oxygenate are present. Data concerning incidence of difficult airway in patients undergoing cardiovascular surgery is controversial. Unwanted hemodynamic changes that may occur in patients undergoing cardiovascular surgery, combined with hemodynamic changes caused by underlying cardiac pathologies, may also lead to a physiologically difficult airway situation. Since all these interactions, combined with the hemodynamic changes caused by difficult airway interventions, may lead to catastrophic outcomes, it is vital to predict difficult airway in this patient population.
Undergoing cardiovascular surgery
ASA I-IV physical status
Over 18 years of age
Known difficult airway
Head-neck and upper airway pathology
Patients at risk of aspiration
Patients undergoing cardiac surgery at the Cardiovascular Surgery Department of Etlik City Hospital, Ankara.
Other
Prospective
Not listed
Intubation difficulty
Intubation difficulty is defined with the intubation difficulty scale score and a score greater or equal to 5 is difficult intubation
Dificult mask ventilation
Difficult mask ventilation is defined by Han scale score, a grade greater or equal to 1 is difficult mask ventilation
Laringeal view score
Cormack lehanne score will be used , a score greater or equal to 2b is considered predictive of difficult airway
LEMON score
LEMON score is Look externally Evaluate 3-3-2 rule can 3 fingers fit in the mouth (mouth opening \<5 cm) and is the mandible lenght at least 3 fingers from the mentum to the hyoid ( thyromental distance \<6 cm) and is the distance from the hyoid to thyroid at least 2 fingers Mallampati class Obstruction (presence of any obstruction) Neck mobility (limited mobility) 1 point each and \>10 points at risk of difficult airway
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