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The Comparison of Two Different Methods of Partial Inflation of Cuff for Facile Insertion of Laryngeal Mask Airway in Adult Patients

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT01606956
First Posted: May 28, 2012
Last Update Posted: March 5, 2014
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Yonsei University
  Purpose
Partial cuff inflation before insertion is generally used for laryngeal mask airway insertion in adult patients. However, it is not proven how much the cuff should be inflated. The aim of this study is to compare efficacy between the method using the resting volume and the method using half the maximum volume for partial cuff inflation.

Condition Intervention
General Anesthesia Procedure: The cuff inflation by the resting volume Procedure: The cuff inflation by half the maximum volume

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Care Provider, Investigator)
Official Title: The Comparison of Two Different Methods of Partial Inflation of Cuff for Facile Insertion of Laryngeal Mask Airway in Adult Patients

Further study details as provided by Yonsei University:

Primary Outcome Measures:
  • The intra-cuff pressure [ Time Frame: approximately 5 to 10 minutes after insertion of LMA. ]
    After insertion of LMA, we confirm adequate ventilation. And then we measure intra-cuff pressure using cuff pressure manometer.


Secondary Outcome Measures:
  • leak volume [ Time Frame: approximately 5 to 10 minutes after insertion of LMA. ]
    After confirming adequate ventilation, tidal volumes are measured using spirometer sensor attached anesthesia machine. Five corresponding inspiratory and expiratory tidal volumes are recorded and the difference between these is calculated as the leak volume.


Enrollment: 80
Study Start Date: May 2012
Study Completion Date: July 2013
Primary Completion Date: July 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: resting volume group Procedure: The cuff inflation by the resting volume
80 patients are randomly allocated into two groups : resting volume group (n=40), half the maximum volume group (n=40). In the resting volume group, the pilot balloon valve is connected to syringe without piston for keeping the valve open to the atmosphere and allowing the pressure within the cuff of LMA to equalize with atmospheric pressure. In the half the maximum volume group, the cuff of LMA is completely emptied and then the cuff is filled with the half the maximum volume.
Active Comparator: half the maximum volume group Procedure: The cuff inflation by half the maximum volume
80 patients are randomly allocated into two groups : resting volume group (n=40), half the maximum volume group (n=40). In the resting volume group, the pilot balloon valve is connected to syringe without piston for keeping the valve open to the atmosphere and allowing the pressure within the cuff of LMA to equalize with atmospheric pressure. In the half the maximum volume group, the cuff of LMA is completely emptied and then the cuff is filled with the half the maximum volume.

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   20 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • adult patients (20-70 years of age) scheduled for elective surgery undergoing general anesthesia using LMA-classic size 3-5

Exclusion Criteria:

  • patients with an abnormal airway,
  • patients with reactive airway disease,
  • patients with gastroesophageal reflux disease,
  • patients with chronic respiratory disease,
  • or a history of an upper respiratory tract infection
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01606956


Locations
Korea, Republic of
Severance hospital
Seoul, Korea, Republic of, 120-752
Sponsors and Collaborators
Yonsei University
  More Information

Publications:
Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Yonsei University
ClinicalTrials.gov Identifier: NCT01606956     History of Changes
Other Study ID Numbers: 1-2012-0012
First Submitted: May 22, 2012
First Posted: May 28, 2012
Last Update Posted: March 5, 2014
Last Verified: March 2014