Prediction of Optimal Laryngeal Mask Airway Cuff Volume From Parameters of Physical Examination of Head and Neck
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Enrollment
- 170
- Locations
- 1
- Primary Endpoint
- optimal laryngeal mask airway cuff volume
Study Overview
Brief 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.
Study Design
- Study Type
- Interventional
- Allocation
- Na
- Intervention Model
- Single Group
- Primary Purpose
- Screening
- Masking
- None
Eligibility Criteria
- Ages
- 19 Years to 65 Years (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Adult (age 19-65)
- •American Society of Anesthesiology Classification I-III
Exclusion Criteria
- •cardiovascular disease, cerebrovascular disease, pulmonary disease
- •patient who have operation history for airway
- •patient who expected difficult intubation
- •patient who have risk of aspiration
Arms & Interventions
Classic laryngeal mask airway
single arm
Intervention: Classic laryngeal mask airway (Device)
Outcomes
Primary Outcomes
optimal laryngeal mask airway cuff volume
Time Frame: 20minutes
◦The investigators remove air until gas leak occured around the cuff under airway pressure 15cm H20, fresh gas flow 6liters/min. Check the volume and pressure just before leakage occured.
Secondary Outcomes
No secondary outcomes reported
Investigators
Hye-Won Shin
Director, MD, PhD
Korea University Anam Hospital