Laryngeal Mask Airway
Conditions
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.
Interventions
DEVICElight wand
The light wand is used as a stylet of the flexible LMA. When the investigator inserts the flexible LMA in light wand group, the correct position of the LMA is confirmed by the light.
Sponsors
Ajou University School of Medicine
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
19 Years to 75 Years
Healthy volunteers
No
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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
| Measure | Time frame | Description |
|---|---|---|
| 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. |
Countries
South Korea
Outcome results
None listed