Key result
Guardian CPV Laryngeal Mask achieves ~15% higher oropharyngeal leak pressure versus LMA Supreme.
Why the study?
Does the Guardian CPV Laryngeal Mask improve oropharyngeal leak pressure compared to the LMA Supreme in paralysed, anaesthetised female patients?
RCT (n=120)
randomly assigned
Does the Guardian CPV Laryngeal Mask improve oropharyngeal leak pressure compared to the LMA Supreme in paralysed, anaesthetised female patients?
The Guardian CPV Laryngeal Mask provides higher oropharyngeal leak pressures and lower intracuff pressures compared to the LMA Supreme in anaesthetised female patients.
Supports Guardian CPV preference for superior seal in paralysed female patients under anaesthesia; extends second-generation laryngeal mask comparisons in RCTs.
We investigated the hypothesis that the oropharyngeal leak pressure would differ between the GuardianCPV™ and the LMA Supreme™ in anaesthetised patients. We randomly assigned 120 patients to receive either the GuardianCPV or the LMA Supreme for airway management. Oropharyngeal leak pressure was measured during cuff inflation from 0 to 40 ml in 10-ml steps. In addition, intracuff pressure, fibreoptic position of the airway and drain tube, device insertion success, ventilation success, blood staining and airway morbidity were determined. Mean (SD) oropharyngeal leak pressures for clinically acceptable cuff volumes of 20-40 ml were 31 (7) cmH2O for the GuardianCPV and 27 (7) cmH2O for the LMA Supreme (p < 0.0001); mean (SD) intracuff pressures were 68 (33) cmH2O and 88 (43) cmH2O (p < 0.0001), respectively. We found no differences in device insertion success, ventilation success, fibreoptic position of the airway and drain tube, blood staining or airway morbidity. We conclude that the oropharyngeal leak pressure is better for the GuardianCPV than for the LMA Supreme in anaesthetised patients.
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Tiefenthaler et al. (2013) conducted an RCT in paralysed, anaesthetised patients requiring airway management (n=120). Guardian CPV Laryngeal Mask vs. LMA Supreme was evaluated on oropharyngeal leak pressure for clinically acceptable cuff volumes of 20-40 ml (p=< 0.0001). The Guardian CPV Laryngeal Mask achieved a higher mean oropharyngeal leak pressure than the LMA Supreme (31 vs 27 cmH2O; p < 0.0001) in paralysed, anaesthetised female patients.
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