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

February 14, 2016 updated by: Hye-Won Shin, Korea University Anam Hospital

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

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.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

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 Type

Interventional

Enrollment (Actual)

170

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

19 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

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

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Screening
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: Classic laryngeal mask airway
single arm
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.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
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.
20minutes

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Korea University Anam Hospital

Investigators

  • Study Director: Hye-Won Shin, MD, PhD, Department of anesthesiology and pain medicine, Korea University Anam Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

August 1, 2015

Primary Completion (Actual)

August 1, 2015

Study Completion (Actual)

December 1, 2015

Study Registration Dates

First Submitted

July 16, 2015

First Submitted That Met QC Criteria

July 16, 2015

First Posted (Estimate)

July 20, 2015

Study Record Updates

Last Update Posted (Estimate)

February 17, 2016

Last Update Submitted That Met QC Criteria

February 14, 2016

Last Verified

February 1, 2016

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • LMA60

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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