Comparison of a Single Use (Ambu aScope) and a Reusable Flexible Optical Scope for Intubation Through a Supraglottic Airway Device (Aura-i)

Launched by RIGSHOSPITALET, DENMARK · Nov 30, 2013

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Eligibility criteria

• Inclusion Criteria:
• • ASA physical status 1-3 and evaluated pre-operatively and found suitable for tracheal intubation with a flexible optical scope via the SAD and scheduled for elective surgery/anesthesia and are conscious about their rights and consequences of participating in the study.
• * The patient must have one or two of the following predictors of difficult tracheal intubation:
• • 1. Modified Mallampati score \> 2 (= "no parts of the Uvula is visible")
• • 2. a thyromental distance of less then or equal to 6.5 cms
• • 3. Combined movement in head and neck \< 90 degrees
• • 4. Mouth-opening less the 4 cm (but must be larger then 2.5 cm)
• • 5. Inability to protrude the teeth n the lower jaw beyond the upper incisors
• • 6. BMI \> 40 combined with a neck-circumference \> 43 cms
• • 7. Upper-lip-bite-test \> 2
• • 8. Previous difficult intubation or laryngoscopy (If more then two criteria are fulfilled the patient should be considered intubated awake instead. . But the upper-lip-bite-test and the prognation-beyond the incisors test represents a similar thing, namely the inability to sub-luxate the lower jaw, the if both these findings are positive it is only considered as counting for one.
• Exclusion Criteria:
• • ASA physical status 4 or 5
• • contraindications for use of the SAD
• • Patients in whom intubation via a SAD has previously failed
• • Patients at risk of aspiration from the gastrointestinal channel
• • diseases in mouth, pharynx or larynx that precludes the use of a SAD
• • Patients in whom the cricothyroid membrane cannot be localized preanaesthetically
• • Patients in whom the doctor making the pre-anaesthetic evaluation finds in need of an awake intubation
• • Patients with possible Creutzfeldt-Jacobs disease or contraindication against the use of non-autoclavable equipment r risk of cross contamination with prions