Anesthetic Gas Leakage in Children During Tonsillectomy: a Comparison of Cuffed and Uncuffed Tracheal Tubes

February 10, 2017 updated by: Jerrold Lerman, State University of New York at Buffalo
Fires and operating room pollution may occur when anesthesia gases leak into the oropharynx during airway surgery. Investigators sought to measure the concentrations of anesthetic gases that leak into the mouth of children undergoing adenotonsillectomy using cuffed and uncuffed tracheal tubes during spontaneous and controlled ventilation.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

For the past 6 decades, uncuffed tubes have been used for the children less than 8 years of age out of a fear that cuffed tubes would cause damage to the subglottic region. The correct size uncuffed tube creates a seal in the subglottis that has minimal pressure on the mucosa. However, cuffed tubes have become more widely used in children recently without causing damage to the mucosa. There is very little literature comparing the magnitude of the gas leaks with cuffed and uncuffed tracheal tubes particularly in children. Several authors suggest that the leak of nitrous oxide and sevoflurane with uncuffed tubes was much greater than with cuffed tubes. One important but poorly studied issue is the risk of an airway fire when cautery is used for tonsillectomy because a large leak of oxygen in the mouth could ignite a fire. It also remains unclear whether the mode of ventilation, spontaneous or controlled, affects the leak of gases into the mouth. One might expect that the gas leak with spontaneous ventilation is less than with controlled ventilation, but it may not matter in the context of the small concentrations of oxygen and sevoflurane that investigators use. To address all of these concerns, investigators designed this study to compare the concentrations of gases (oxygen, carbon dioxide, nitrous oxide and sevoflurane) in the oral cavity of children undergoing T&A with either cuffed or uncuffed tubes, during spontaneous and controlled ventilation.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
31

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

1 year to 6 years (Child)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. American society of anesthesiologists physical status 1 and 2;
  2. fasted
  3. scheduled for elective adenotonsillectomy

Exclusion Criteria:

  1. refusal of consent by parents
  2. difficult tracheal intubation
  3. craniofacial anomalies
  4. gastroesophageal reflux
  5. malignant hyperthermia
  6. randomization to a tracheal tube is unacceptable.

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: Other
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Placebo Comparator: Uncuffed tracheal tubes
After tracheal intubation with an uncuffed tube, the interventions will be the oxygen concentration, nitrous oxide concentration, carbon dioxide concentration and sevoflurane concentration measured in the tracheal tube compared with those in the oropharynx during spontaneous and controlled ventilation.
Drug: oxygen concentration
oxygen concentration will be measured in the tracheal tube and oropharynx during spontaneous or controlled ventilation
Other Names:
  • difference in the oxygen concentration
Drug: nitrous oxide concentration
nitrous oxide concentration will be measured in the tracheal tube and oropharynx during spontaneous or controlled ventilation
Other Names:
  • difference in the nitrous oxide concentration
Drug: carbon dioxide concentration
carbon dioxide concentration will be measured from the tracheal tube and in the oropharynx during spontaneous or controlled ventilation
Other Names:
  • difference in the carbon dioxide concentration
Drug: sevoflurane concentration
sevoflurane concentration will be measured in the tracheal tube and oropharynx during spontaneous or controlled ventilation
Other Names:
  • difference in the sevoflurane concentration
Active Comparator: Cuffed tracheal tubes
After tracheal intubation with a cuffed tube, the interventions will be the oxygen concentration, nitrous oxide concentration, carbon dioxide concentration and sevoflurane concentration measured in the tracheal tube compared with those in the oropharynx during spontaneous and controlled ventilation.
Drug: oxygen concentration
oxygen concentration will be measured in the tracheal tube and oropharynx during spontaneous or controlled ventilation
Other Names:
  • difference in the oxygen concentration
Drug: nitrous oxide concentration
nitrous oxide concentration will be measured in the tracheal tube and oropharynx during spontaneous or controlled ventilation
Other Names:
  • difference in the nitrous oxide concentration
Drug: carbon dioxide concentration
carbon dioxide concentration will be measured from the tracheal tube and in the oropharynx during spontaneous or controlled ventilation
Other Names:
  • difference in the carbon dioxide concentration
Drug: sevoflurane concentration
sevoflurane concentration will be measured in the tracheal tube and oropharynx during spontaneous or controlled ventilation
Other Names:
  • difference in the sevoflurane concentration

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Difference in the oxygen concentration with uncuffed and cuffed tubes during spontaneous or controlled ventilation
Time Frame: 8 months
The differences in the oxygen concentration measured in the trachea and the oropharynx with uncuffed and cuffed tubes during spontaneous or controlled ventilation
8 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Difference in the nitrous oxide concentration with uncuffed and cuffed tubes during spontaneous or controlled ventilation
Time Frame: 8 months
The differences in the nitrous oxide concentration measured in the trachea and the oropharynx with uncuffed and cuffed tubes during spontaneous or controlled ventilation
8 months
Difference in the carbon dioxide concentration with uncuffed and cuffed tubes during spontaneous or controlled ventilation
Time Frame: 8 months
The differences in the carbon dioxide concentration measured in the trachea and the oropharynx with uncuffed and cuffed tubes during spontaneous or controlled ventilation
8 months
Difference in the sevoflurane concentration with uncuffed and cuffed tubes during spontaneous or controlled ventilation
Time Frame: 8 months
The differences in the sevoflurane concentration measured in the trachea and the oropharynx with uncuffed and cuffed tubes during spontaneous or controlled ventilation
8 months

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
State University of New York at Buffalo

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Jerrold Lerman, MD, FRCPC, Women & Children's Hospital of Buffalo

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 12, 2016

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2016

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 1, 2016

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 25, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 30, 2016

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 31, 2016

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
February 13, 2017

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 10, 2017

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Gas leak during tonsillectomy

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

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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