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  • Title: Randomized prospective study comparing the laryngeal tube suction II with the ProSeal laryngeal mask airway in anesthetized and paralyzed patients.
    Author: Kikuchi T, Kamiya Y, Ohtsuka T, Miki T, Goto T.
    Journal: Anesthesiology; 2008 Jul; 109(1):54-60. PubMed ID: 18580172.
    Abstract:
    BACKGROUND: The Laryngeal Tube Suction II (LTSII; VBM, Medizintechnik, Sulz, Germany) is a recent revision of the Laryngeal Tube Suction. This study compared insertion and ventilation profiles of the LTSII and the ProSeal Laryngeal Mask Airway (PLMA; Laryngeal Mask Company, Henley-on-Thames, United Kingdom) in anesthetized and paralyzed patients. METHODS: One hundred adult male patients were randomly allocated to an LTSII or PLMArade mark group. The rate of successful insertion, insertion time, airway leak pressure at a cuff pressure of 60 cm H2O, tidal volume during pressure-controlled ventilation, incidence of gas leakage with cuff pressure reduced and with the shaft inclined, position of LTSII under fluoroscopic observation, and postoperative airway morbidity were determined. RESULTS: Insertion was successful in 37 and 48 of 50 patients with LTSII and PLMA, respectively (P = 0.002), with similar insertion times. Tidal volume was lower with LTSII than with PLMA. Median airway leak pressures of LTSII and PLMA were 16 and 21 cm H2O, respectively (P = 0.006). Gas leakage around the cuff was observed more frequently with LTSII than with PLMA when the cuff pressure was reduced or the shaft of the device inclined. The position of LTSII varied significantly and did not statistically correlate with patient height. Postoperative airway-related morbidity was not significantly different. Finally, tracheal misplacement of LTSII occurred in 5 of 50 patients (10%), but ventilation was possible in 4 of them, and misplacement was identified only after fluoroscopic examination was performed. CONCLUSION: Airway management with LTSII is inferior to that with PLMA.
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