Comparison of the Clinical Effectiveness of the CobraTM Perilaryngeal Airway and the ProSealTM Laryngeal Mask Airway during Anesthesia with Controlled Ventilation

Kim, Yoo Kyung; Jeon, Hye Young; Yang, Hong Seuk

Abstract

BACKGROUND: Supraglottic airway devices are currently available. We compared the efficacy of the Cobra perilaryngeal airway (CobraPLATM) and the ProSealTM laryngeal mask airway (PLMA) during anesthesia with controlled ventilation for the insertion success rate, hemodynamic stability after insertion, intraoperative ventilatory parameters, and postoperative laryngeal discomfort.
METHODS
Forty-three patients received either a CobraPLATM or a PLMA after induction with thiopental 5 mg/kg, fentanyl 1microg/kg and rocuronium 0.6 mg/kg, and manual controlled ventilation with N2O: O2 (1:1) and sevoflurane 5-6 vol% for 2 minutes. Unblinded observers collected the intraoperative data, and blinded observers collected the postoperative data.
RESULTS
The two devices were similar for hemodynamic stability after insertion, and for the intraoperative ventilatory parameters. The success rates of first-attempts were similar, but the insertion time was longer for the CobraPLATM. The cuff volume and pressure changes were significantly higher for the PLMA than the CobraPLATM. The cuff pressure was significantly higher for the CobraPLATM than the PLMA from insertion to 10 minutes after insertion, but at 30, 60 and 90 minutes after the insertion, there was no significant difference for the two devices. There were no differences with respect to the incidence of adverse events.
CONCLUSIONS
During anesthesia with controlled ventilation, these two devices can be used successfully and effectively. We suggest that the CobraPLATM could be used an alternative device for airway management and further investigation is required.