Appropriate Laryngeal Mask Airway Size in Patients With Overweight: A Comparison of the Actual Body Weight and Ideal Body Weight

Not Applicable

Completed

• Conditions: General Anesthesia
• Interventions: Device: ideal body weight based size; Device: actual body weight based size

• Registration Number: NCT01843270
• Lead Sponsor: Yonsei University

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.

Detailed Description

Not available

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study First Submitted: 2013-04-23
• Study First Submitted QC: 2013-04-25
• Study First Posted: 2013-04-30
• Study Start: 2013-11
• Status Verified: 2014-01
• Primary Completion: 2014-09
• Study Completion: 2014-09
• Last Update Submitted: 2014-09-25
• Last Update Posted: 2014-09-29

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

• age 20~70
• body mass index > 25 kg/m2
• patient who needs surgery with laryngeal mask airway

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Exclusion Criteria

• difficult airway
• upper airway infection or disease of airway
• history of gastroesophageal reflux
• history of head and neck surgery

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
ideal body weight	ideal body weight based size	LMA size based on ideal body weight
actual body weight	actual body weight based size	LMA size according to actual body weight

Primary Outcome Measures

Name	Time	Method
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.

Trial Locations

Locations (1)

Severance Hospital; 🇰🇷 Seoul, Korea, Republic of