NCT02502422

Relationship Between Optimal Laryngeal Mask Airway Cuff Volume and Physical Examination of Head and Neck

Prediction of Optimal Laryngeal Mask Airway Cuff Volume From Parameters of Physical Examination of Head and Neck

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 170 (actual)
• Sponsor: Korea University Anam Hospital · Academic / Other
• Sex: All
• Age: 19 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

Overinflation of laryngeal mask airway cuff increase side effect like hoarseness, vocal cord paralysis, sorethroat. The investigators will study correlation between laryngeal mask airway cuff volume and pressure and physical examination of head and neck.

Detailed description

Overinflation of laryngeal mask airway cuff can induce side effects like hoarseness, vocal cord paralysis, sorethroat. Some study revealed that 60cmH2O of intracuff pressure is maximum pressure which is not increase side effect. The manufacturer recommends that the cuff is inflated with the minimum volume of air required to provide an effective seal(max volume - size 3, 20 ml; size 4, 30 ml; size 5, 40). The investigators will measure anatomical structure (neck circumference, neck length, thyroid-mental distance, etc.) which can influence cuff volume and pressure and find correlation between cuff volume and physical figure measured.

Conditions

• Anesthesia

Interventions

Type	Name	Description
DEVICE	Classic laryngeal mask airway	1. measurement of head and neck * Ht,Wt,BMI, neck circumference above a thyroid cartilage, mandible circumference( from the lower part of earlobe-mandible angle-mentum-mandible angle to the lower part of earlobe), neck length (mastoid tip\~sternal notch), modified mallampati classification under sitting position, thyromental distance. 2. laryngeal mask airway insertion and measuring cuff pressure by pressure transducer * \# 4.0 for female, #5.0 for male * initial cuff volume(air) : maximum volume recommended by the manufacturer * check pressure : if it exceed 60cmH20, we will remove air until 60cmH20 * remove air until gas leak occured around the cuff under airway pressure 15cmH20, fresh gas flow 6liters/min. Check the volume and pressure just before leakage occured.

Timeline

• Start date: 2015-08-01
• Primary completion: 2015-08-01
• Completion: 2015-12-01
• First posted: 2015-07-20
• Last updated: 2016-02-17

Locations

1 site across 1 country: South Korea