• Vet Anaesth Analg · Jan 2016

    Randomized Controlled Trial

    Clinical evaluation of the v-gel supraglottic airway device in comparison with a classical laryngeal mask and endotracheal intubation in cats during spontaneous and controlled mechanical ventilation.

    • Sarah A Prasse, Johanna Schrack, Sandra Wenger, and Martina Mosing.
    • Section of Anaesthesiology, Equine Department, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
    • Vet Anaesth Analg. 2016 Jan 1; 43 (1): 55-62.

    ObjectiveTo compare airway management during induction of anaesthesia, in spontaneous ventilation and controlled mechanical ventilation (CMV), using a cat-specific supraglottic airway device (the v-gel), a classical laryngeal mask (LM) or an endotracheal tube (ETT).Study DesignProspective, randomized clinical trial.AnimalsForty-five healthy cats.MethodsAfter premedication, cats were randomly allocated to one of three groups to secure the airway: 1) v-gel; 2) LM; or 3) ETT (cuff pressure: 20 cm H2O). Cats were anaesthetized for elective procedures. The dose of propofol necessary to insert the v-gel, LM or ETT, the number of attempts required to achieve insertion and leakage during spontaneous ventilation and CMV at different peak inspiratory pressures (8, 10, 12, 14 and 16 cm H2O) were recorded. Leakage of >20% of tidal volume was considered as a criterion for exclusion. Significance was set at a p-value of <0.05.ResultsCats in the v-gel group required a median (range) of 3 mg kg(-1) (2-5 mg kg(-1)) of propofol for successful placement, which was significantly less than the 5 mg kg(-1) (3-7 mg kg(-1)) required for endotracheal intubation (p = 0.005). No significant difference in the total dose of propofol was observed between the v-gel and LM [3 mg kg(-1) (2-7 mg kg(-1))] groups or the ETT and LM groups. Significantly more cats in the ETT group were excluded for leakage of >20% during CMV at all pressure settings.Conclusions And Clinical RelevanceThe v-gel is a practical alternative to the LM and ETT for securing the airway after induction of anaesthesia and for CMV up to 16 cm H2O in healthy cats. The v-gel can be inserted at a more superficial level of anaesthesia than the ETT and showed significantly less leakage during CMV than the ETT.© 2015 Association of Veterinary Anaesthetists and the American College of Veterinary Anesthesia and Analgesia.

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