Intubating Laryngeal Mask Airway Size Selection: A Randomized Triple Crossover Study in Paralyzed, Anesthetized Male and Female Adult Patients

2002 ◽  
Vol 94 (4) ◽  
pp. 1023-1027 ◽  
Author(s):  
S. Kihara ◽  
Y. Yaguchi ◽  
J. Brimacombe ◽  
S. Watanabe ◽  
N. Taguchi ◽  
...  
Keyword(s):  
Laryngeal Mask Airway ◽  
Crossover Study ◽  
Adult Patients ◽  
Laryngeal Mask ◽  
Female Adult ◽  
Male And Female ◽  
Size Selection ◽  
Intubating Laryngeal Mask Airway

A Comparison of Sex- and Weight-based ProSeal™  Laryngeal Mask Size Selection Criteria

2004 ◽  
Vol 101 (2) ◽  
pp. 340-343 ◽  
Author(s):  
Shinichi Kihara ◽  
Joseph R. Brimacombe ◽  
Yuichi Yaguchi ◽  
Noriko Taguchi ◽  
Seiji Watanabe
Keyword(s):  
Gas Exchange ◽  
Laryngeal Mask Airway ◽  
Mucosal Injury ◽  
Proseal Laryngeal Mask Airway ◽  
Adult Patients ◽  
Laryngeal Mask ◽  
Leak Pressure ◽  
Digital Technique ◽  
Size Selection ◽  
Oropharyngeal Leak Pressure

Background The authors compared the manufacturer's weight-based formula (size 3 for weight < 50 kg, size 4 for weight 50-70 kg, and size 5 for weight > 70 kg) with a sex-based formula (size 4 for women and size 5 for men) for selecting the appropriate size of ProSeal laryngeal mask airway. Methods Two hundred thirty-seven healthy, anesthetized, paralyzed adult patients (American Society of Anesthesiologists physical status I or II; age, 18-80 yr) were randomly allocated for weight- or sex-based size selection. An experienced user inserted the ProSeal laryngeal mask airway with the digital technique. The following were compared: ease of insertion, oropharyngeal leak pressure, ease of ventilation, gas exchange, location of gas leak, anatomic position, mucosal injury, and postoperative pharyngolaryngeal problems. Intraoperative and postoperative data collection were unblinded and blinded, respectively. Results Ease of insertion, anatomic position, gas exchange, mucosal injury, and postoperative pharyngolaryngeal problems were similar between groups. For the sex-based group, larger ProSeal laryngeal mask airways were selected more frequently (P < 0.0001), oropharyngeal leak pressure (P = 0.02) was higher, leak volume (P = 0.004) and leak fraction (P = 0.007) were lower, and oropharyngeal leaks (P = 0.03) were detected less frequently. Conclusion Size selection for the ProSeal laryngeal mask airway is equally effective using the manufacturer's weight-based formula or the sex-based formula in healthy, anesthetized, paralyzed adult patients, but leakage of small volumes of air from the mouth occurs less frequently with the sex-based formula.

scholarly journals Tracheal Intubation through the Intubating Laryngeal Mask Airway (LMA-Fastrach™) in Patients with Difficult Airways

1998 ◽  
Vol 26 (4) ◽  
pp. 387-391 ◽  
Author(s):  
T. Fukutome ◽  
K. Amaha ◽  
K. Nakazawa ◽  
T. Kawamura ◽  
H. Noguchi
Keyword(s):  
Laryngeal Mask Airway ◽  
Tracheal Intubation ◽  
Potential Role ◽  
Adult Patients ◽  
Laryngeal Mask ◽  
Patent Airway ◽  
Intubating Laryngeal Mask Airway ◽  
Difficult Airways

The intubating laryngeal mask airway was used in 31 adult patients in whom tracheal intubation was known or suspected to be difficult. The intubating laryngeal mask airway was successfully inserted in 30 patients and provided a clinically patent airway. In the remaining one patient it was impossible to insert the device correctly. Tracheal intubation through the device was successful in 28 of 30 patients (93%). These results suggest that the intubating laryngeal mask airway has a potential role for tracheal intubation in adult patients with difficult airways.

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