Usefulness of Light Wand-guided Insertion of Flexible Reinforced Laryngeal Mask Airway

Not Applicable

Completed

• Conditions: Laryngeal Mask Airway
• Interventions: Device: light wand

• Registration Number: NCT03224611
• Lead Sponsor: Ajou University School of Medicine

Brief Summary

Flexible LMA (Laryngeal mask airway) is very useful for variable situation but it is hard to insert in correct position because of it's flexible structure. Especially in classical way of manual LMA insertion, when the index finger could not guide the flexible LMA to the optimal position, we could not guarantee the correct position of the LMA. Therefore several studies have been investigated to improve this.

The light wand is a kind of stylet which have a light on the tip. Recently some studies demonstrated the usefulness of the light wand which could be used for indicating correct position of the LMA. We hypothesised there will be two advantages if the light wand is used as a stylet of the flexible LMA. First the stylet could support the mildness of the flexible LMA, and second the lightness could confirm the correct position of the flexible LMA.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2017-07-13
• Study First Submitted QC: 2017-07-19
• Study First Posted: 2017-07-21
• Study Start: 2017-08-01
• Primary Completion: 2018-09-30
• Study Completion: 2018-09-30
• Status Verified: 2018-10
• Last Update Submitted: 2018-10-16
• Last Update Posted: 2018-10-17

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 54

Inclusion Criteria

• The patient need general anesthesia using LMA and belonged to the ASA(American society of Anesthesiologist) class I or II

Exclusion Criteria

• The patient who has URI(upper respiratory infection) symptom within 14 days or
• The patient's BMI(body mass index) exceeds 35 kg/m2
• The patient has severe GERD(gastroesophageal reflux disease) or hiatus hernia
• The patient who has any contraindication for LMA insertion

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Light wand group	light wand	The flexible LMA is inserted using light wand as a stylet

Primary Outcome Measures

Name	Time	Method
Oropharyngeal leak pressure	5 minutes after LMA is inserted	The oropharyngeal leak pressure is measured by the pressure which the investigator could detect the audible sound by stethoscope on patient's cheek during the exhaust valve is closed and the fresh gas is allowed to flow into the lungs at 3 liters per minute.

Secondary Outcome Measures

Name	Time	Method
The grade of oropharyngeal view through the fiberoptic assessment	5 minutes after LMA is inserted	The position of the LMA was assessed by fiberoptic examination through an attachment between the LMA and the anesthetic circuit.

Trial Locations

Locations (1)

Ajou University Hospital; 🇰🇷 Suwon, Gyeonggido, Korea, Republic of