Difficult tracheal intubation in obstetrics

Evaluation of the upper lip bite test in predicting difficult laryngoscopy

“…After induction of general anesthesia with muscle relaxation, all patients underwent ETI. The best glottic view obtained at direct laryngoscopy was recorded as defined by the grading system of Cormack and Lehane [3], as modified by Samsoon and Young [5]. The anesthesia provider performing the ETI reported the grade of laryngeal view.…”

“…The upper lip bite test (ULBT) [2] was introduced as a predictive bedside test for potential difficult laryngoscopy, as defined as a Cormack and Lehane grade 3 or 4 view [3]. Poor performance on the ULBT (class III) was proposed to predict a Cormack and Lehane grade 3 or 4 laryngeal view, and the ULBT was reported to be superior to the Mallampati test [4].…”

Intubation training in emergency medicine: a review of one trainee's first 100 procedures

“…All complications occurred during intubation procedures with drugs. There were 90 grade 1 intubations, as defined by Cormack and Lehane, 9 6 grade 2 intubations, and 4 grade 3 intubations. There were no episodes of desaturation (SaO 2 ,90%) post-procedure, cardiac arrest post-procedure, hypotension postprocedure requiring treatment, trauma to airway, vomiting or regurgitation secondary to the intubation procedure or a requirement for a surgical airway in any of the procedures.…”

The intubating laryngeal mask: is there a role for paramedics?

“…The best view at laryngoscopy obtained by the authors was grade 3 (epiglottis visible, no vocal cords visible). 8 Bag-mask ventilation was not assessed as the Mannequin was unable to simulate both a failed bag-mask ventilation and a failed intubation concurrently.…”