• Der Anaesthesist · Aug 2004

    Randomized Controlled Trial Comparative Study Clinical Trial

    [Laryngeal tube versus laryngeal mask airway in anaesthetised non-paralysed patientsA comparison of handling and postoperative morbidity].

    • M Wrobel, U Grundmann, W Wilhelm, S Wagner, and R Larsen.
    • Klinik für Anaesthesiologie und Intensivmedizin, Universitätsklinikum des Saarlandes, Homburg/Saar. marc.wrobel@uniklinik-saarland.de
    • Anaesthesist. 2004 Aug 1;53(8):702-8.

    BackgroundThe purpose of this study was to compare the classical laryngeal mask airway (LMA) with the laryngeal tube (LT) in anaesthetised non-paralysed patients.Patients And MethodsA total of 100 patients scheduled for minor elective surgery were included. After standardised induction and maintenance of anaesthesia with propofol and remifentanil, patients were randomly allocated to receive either a LMA or LT; muscle relaxants were not applied. Selection of the appropriate size and the initial inflation volume were chosen according to the manufacturers instructions. Ease of insertion, initial intra-cuff pressure, oropharyngeal leak pressure at an intra-cuff pressure of 60 cm H(2)O and incidence and severity of complications during and after anaesthesia were compared.ResultsThe LT was inserted significantly quicker than the LMA (35.1+/-15.9 s vs. 56.6+/-42.5 s; mean+/-SD). Insertion of the LT was successful within 1 attempt in 90% and within 2 or 3 attempts in another 4% of patients for the LT compared with 68% and 20% of patients for the LMA, respectively. For the LT the initial cuff pressure was significantly lower (75.1+/-16.2 cm H(2)O) and the oropharyngeal leak pressure after adjustment of the intra-cuff pressure to 60 cm H(2)O was significantly higher (27.2+/-6.9 mbar) compared with the LMA (109.5+/-25.7 cm H(2)O and 19.9+/-4.0 mbar, respectively). Incidence of postoperative laryngeal complications in the LT group (31%) was lower compared with the LMA group (54%).ConclusionIn anaesthetised non-paralysed patients the LT compares favourably to the LMA in terms of ease of insertion and postoperative morbidity.

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