A comparative analysis of the LMA-ClassicTM and the disposable Soft SealTM Laryngeal Mask in spontaneously breathing patients: A randomized prospective study
Journal Title: International Journal of Medical Science and Innovative Research (IJMSIR) - Year 2018, Vol 3, Issue 11
Abstract
Background: We performed a comparative trial in 60 spontaneously breathing adult patients under, general anesthesia to compare the performance of the reusable LMA-ClassicTM [LMA-C] and the disposable Soft SealTM LMA [LMA-S]. Material-Method: Sixty patients aged 18-65 years [ASA I-I] were randomly assigned into two equal groups to receive either the LMA-C or the LMA-S for airway management during general anesthesia. Anesthesia was induced with 1μg/kg fentanyl and 2-3 mg/kg propofol intravenously until the loss of verbal response and eyelash reflex. The anesthesia maintenance was provided by a mixture of 50% nitrous oxide-oxygen and sevoflurane 1-2% in a fresh gas flow of 3 L/min. The targeted endpoint for the depth of anesthesia was to achieve a BIS value of 40±10. The cuff pressure was adjusted to 60 cmH2O with a hand-held aneroid manometer and recorded every half hourly throughout the surgical procedure. The outcomes of the study were to assess the clinical performance and the cuff pressure changes of both airway devices. Results: Demographic characteristics and the duration of anesthesia were comparable. Both LMA-C and LMA-S showed similar clinical characteristics in terms of successful insertion at the first attempt, the insertion time and the ease of insertion. The cuff pressure was significantly higher in the LMA-C group compared to the LMA-S [97.96±13.23 and 73.72±7.92 cmH2O respectively]. The sore throat at the 2nd hour was reported in a total of 9 patients; 6 of them were the LMA-C and 3 of them were the LMA-S received patients [0% vs. 10%; p<0.05]. However, there was no such difference at the 24th hour postoperatively. The incidence of blood staining was similar in both masks with a insignificant difference [11% in the LMA-C and 13.33% in the LMA-S]. Conclusion: The Soft SealTM LMA is a safe, effective and useful disposable airway device alternative in non-paralyzed patients under general anesthesia. The lower cuff pressure changes and the postoperative sore throat incidence may be considered as a clinical superiority to the LMA®-Classic™.
Authors and Affiliations
Banu Cevik
Keywords
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