General Anesthesia
Conditions
Keywords
general anesthesia, body weight, laryngeal mask airway size
Brief summary
The classic laryngeal mask airway is one of the keystones of modern anaesthetic practice. It achieves a reliable airway with a low incidence of major complications and pharynges-laryngeal morbidity. The manufactures of laryngeal mask airway recommend the proper size selection by actual body weight. It was recommended a size 3 for 30-70kg, a size 4 for 70-90 kg, and size 5 for \> 90 kg. Obesity increases the fat tissue around an upper airway and decreases the pharyngeal cross sectional area. Also it was reported that pharyngeal area was reduced according to the increasing of BMI. Therefore, the aim of this study is to determine which of actual body weight or ideal body weight is proper on the size selection of laryngeal mask airway.
Interventions
DEVICEactual body weight based size
According randomized allocated group, the laryngeal mask airway is inserted based on actual or ideal body weight-based sizes before the surgery.
DEVICEideal body weight based size
According randomized allocated group, the laryngeal mask airway is inserted based on actual or ideal body weight-based sizes before the surgery.
Sponsors
Yonsei University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
20 Years to 70 Years
Healthy volunteers
No
Inclusion criteria
* age 20\ 70 * body mass index \> 25 kg/m2 * patient who needs surgery with laryngeal mask airway
Exclusion criteria
* difficult airway * upper airway infection or disease of airway * history of gastroesophageal reflux * history of head and neck surgery
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Oropharyngeal leak pressure | 10mins | Oropharyngeal leak pressure is measured when the airway pressure becomes the plateau state in condition of gas flow 3 L/min and flow out valve 30 cmH2O. |
Countries
South Korea
Outcome results
None listed