A Comparison of the Classic and a Modified Laryngeal Mask Airway (OPLAC™) in Adult Patients

Abstract

Both devices have comparable airflow resistance and are easy to insert. The OPLAC requires less insertion time, has less variation on insertion time, fits better into the laryngopharynx, is less likely to cause gastric insufflations, and has a higher sealing pressure.

Clinical efficacy of the classic laryngeal mask airway in elderly patients: a comparison with young adult patients

“…Our findings with respect to the first attempt success rate of LMA-C insertion and adequate ventilation in the young group (96%) compares well with the results of previous studies [ 15 23 ]. Previous studies demonstrated that the first attempt success rate in adults (mean age: 39.7-45.1 years) was 96.7-98.0% [ 15 23 ]. In our study, the number of elderly patients who needed further adjustment of the LMA-C position after initial insertion was greater than that of young patients.…”

“…A standard pre-use test was performed. Then, the cuff of the LMA-C was partially inflated with half the amount of air recommended by the manufacturer (size 3, 10 ml of air; size 4, 15 ml of air; and size 5, 20 ml of air) [ 13 14 15 ]. All devices were lubricated with a water-soluble gel.…”

“…All data were assessed and recorded by an independent observer who did not know the objective of this study. At the first attempt, the LMA-C was inserted with the cuff partially inflated, using the midline approach [ 13 14 15 ]. If resistance was encountered during insertion, rightward or leftward rotation was performed during advancement [ 15 16 17 18 ].…”

“…At the first attempt, the LMA-C was inserted with the cuff partially inflated, using the midline approach [ 13 14 15 ]. If resistance was encountered during insertion, rightward or leftward rotation was performed during advancement [ 15 16 17 18 ]. Effective ventilation was confirmed by bilateral chest wall expansion and an appropriate capnographic trace after the cuff pressure of the LMA-C was adjusted to 60 cmH 2 O using a cuff pressure gauge (VBM Medizintechnik GmbH, Sulz, Germany).…”

Self-pressurized air-Q® intubating laryngeal airway versus the LMA® Classic™: a randomized clinical trial

“…Not surprisingly, as an established SGA with a proven clinical track record, the LMA has been and continues to be a standard for comparison. [4][5][6][7][8][9][10] The recently developed self-pressurized air-QÒ intubating laryngeal airway (air-Q SP) (Mercury Medical, Clearwater, FL, USA) is a single-use SGA that does not require cuff inflation. The original air-QÒ intubating laryngeal airway (Cookgas LLC; Mercury Medical) was designed to facilitate tracheal intubation through its lumen.…”