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  • Title: Comparison of Aintree and Fastrach techniques for low-skill fibreoptic intubation in patients at risk of secondary cervical injury: a randomised controlled trial.
    Author: Malcharek MJ, Rockmann K, Zumpe R, Sorge O, Winter V, Sablotzki A, Schneider G.
    Journal: Eur J Anaesthesiol; 2014 Mar; 31(3):153-8. PubMed ID: 24145806.
    Abstract:
    BACKGROUND: We compared two methods of asleep fibreoptic intubation in patients at risk of secondary cervical injury: the Aintree Intubation Catheter via a classic laryngeal mask airway (cLMA) versus the Fastrach technique via the intubating laryngeal mask airway (iLMA). OBJECTIVE: To test which system has the highest rate of successful intubations in the clinical setting. DESIGN: A randomised controlled study. SETTING: Single-centre, between 2007 and 2010. PATIENTS: We randomly allocated 80 patients (30 women and 50 men) who underwent elective neurosurgery of the cervical spine to either group, placed in a neutral position and wearing a soft cervical collar. Entry criteria were ASA status 1 to 3, age 18 to 80 years and written informed consent. Exclusion criteria were patients with cervical instability, known or predicted difficult airway, BMI greater than 40  kg  m⁻² and symptomatic gastro-oesophageal reflux. INTERVENTIONS: Two anaesthetists who were experienced in both techniques performed all anaesthesia procedures within the study. There was a maximum of three attempts for performing each technique. MAIN OUTCOME MEASURES: The primary outcome was the rate of successful fibreoptic intubation in a neutral position. We also investigated the timing sequence for both techniques, the Brimacombe and Berry Bronchoscopy Score, and differences in technical aspects. RESULTS: All 40 patients in the Aintree group but only 31 patients in the Fastrach group were intubated successfully. Thus, fibreoptic intubation failed significantly less using the Aintree technique (P = 0.002). For secondary outcomes, the cLMA was faster (260 versus 289  s, P = 0.039) and easier (P = 0.036) to insert than the iLMA. The fibreoptic view of the glottis according to the Brimacombe and Berry Bronchoscopy Score was better (P = 0.016) and the tracheal tube was easier to insert (P = 0.010) in the Aintree group. CONCLUSION: Fibreoptic intubation using the Aintree system was more successful than the Fastrach technique in our population of patients in a neutral position wearing a soft cervical collar. The differences in the time to successful intubation between the two groups are unlikely to be clinically relevant.
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