Failure of the Laryngeal Mask Airway Unique™ and Classic™ in the Pediatric Surgical Patient: A Study of Clinical Predictors and Outcomes
Background: Although predictors
of laryngeal mask airway failure in adults have been elucidated, there
remains a paucity of data regarding laryngeal mask airway failure in
children.
Methods: The authors performed a
retrospective database review of all pediatric patients who received a
laryngeal mask anesthetic at their institution from 2006 to 2010. Device
brands were restricted to LMA Unique™ (Cardinal Health, Dublin, OH) and
LMA Classic™ (LMA North America, San Diego, CA), and primary outcome
was laryngeal mask failure, defined as any airway event requiring device
removal and tracheal intubation. Potential risk factors were analyzed
with both univariate and multivariate techniques and included medical
history, physical examination, surgical, and anesthetic characteristics.
Results: Of the 11,910
anesthesia cases performed in the study, 102 cases (0.86%) experienced
laryngeal mask failure. Common presenting features of laryngeal mask
failures included leak (25%), obstruction (48%), and patient intolerance
such as intractable coughing/bucking (11%). Failures occurred before
incision in 57% of cases and after incision in 43%. Independent clinical
associations included ear/nose/throat surgical procedure, nonoutpatient
admission status, prolonged surgical duration, congenital/acquired
airway abnormality, and patient transport.
Conclusions: The findings of
the study support the use of the LMA Unique™ and LMA Classic™ as
reliable pediatric supraglottic airway devices, demonstrating relatively
low failure rates. Predictors of laryngeal mask airway failure in the
pediatric surgical population do not overlap with those in the adult
population and should therefore be independently considered.
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