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Age Influence on the Modifications of the Oral, Pharyngeal and Laryngeal Axis Alignment in Children Induced by Head Extension: an MRI Study

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00920673
First Posted: June 15, 2009
Last Update Posted: February 25, 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):
Assistance Publique Hopitaux De Marseille
  Purpose

In pediatric anesthesia and in pediatric intensive care, tracheal intubation is one of the most important procedure. To achieve this procedure as fast as possible and in is best conditions, the physician should choose the head posture which a priori will enable at first the best glottic visualisation during laryngoscopy, and at second will facilitate the route of the tube from the larynx to the trachea.

Tracheal intubation is a procedure used for years, and many textbooks recommendations on the best head posture for tracheal intubation in paediatrics have been made. Briefly summarized, depending on the age of the child, the head should (or not) be slightly extended, and a pillow should (or not) be positioned under the occiput. These recommendations are questionable for three majors reasons:

  • despite an apparent consensus, some recommendations are quite different.
  • none are based on anatomical nor clinical studies
  • if for all of them, the age of the child is considered as critical point, but children are only grossly categorized in three categories (newborn, infants and old children). And the clinician has no way, facing a child, to make his choice between dichotomic attitudes.

Actually, the responses to these questions should need rigourous clinical studies on laryngoscopy, hard to design and very difficult to make. P.Adnet et coll. (Anesthesiology 2001) showed that an anatomical study with resonance magnetic imaging (MRI) can bring indirect but strong evidence and can be a first step leading to clinical studies. Many children need MRI study for different reasons, and it is fast and easy to get during their examination additional images of the superior airway.

In their unit, the investigators are experienced in this kind of study, as they recently published (Pediatric Anesthesia 2008) an MRI study demonstrating that in children, head extension improves the alignment of the visualisation axis on the laryngeal axis, but worsens the alignment of the pharyngeal axis on the laryngeal axis. However, patients included in their study were in major part infants, so the influence of the age could not be properly analyzed. Morevover, this study suffered of two main limitations, the lack of standardisation of head postures, and that a laryngeal mask the children, who were on general anesthesia (required for the MRI examination) were made using a laryngeal mask (as it was at this time the standard in their institution).

The investigators propose an MRI study of the influence of age on the consequences of head extension on the anatomic axes of the superior airway in children, with a prospective stratified on age study. Several modifications and improvement in the design of this study would diminished the limitations of the first study.


Condition Intervention
Head Extension on the Anatomic Axes of the Superior Airway Procedure: MRI

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Basic Science
Official Title: Age Influence on the Modifications of the Oral, Pharyngeal and Laryngeal Axis Alignment in Children Induced by Head Extension: an MRI Study

Further study details as provided by Assistance Publique Hopitaux De Marseille:

Primary Outcome Measures:
  • To study the influence of age on the consequences of head extension on the anatomic axes of the superior airway in children [ Time Frame: 2 years ]

Estimated Enrollment: 150
Study Start Date: May 2009
Study Completion Date: March 2012
Primary Completion Date: March 2012 (Final data collection date for primary outcome measure)
Intervention Details:
    Procedure: MRI
    MRI during 35 to 65 minutes
  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   42 Weeks to 18 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • No obesity
  • No macro- or micro-cephaly
  • No facial dysmorphism
  • No tumor near to the superior airway

Exclusion Criteria:

  • Premature child
  • MRI in emergency
  • Discovery of a tumor near to the superior airway during the MRI
  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): NCT00920673


Locations
France
Assistance Publique - Hôpitaux de Marseille
Marseille, France
Assistance Publique-Hopitaux de Marseille
Marseille, France
Sponsors and Collaborators
Assistance Publique Hopitaux De Marseille
Investigators
Principal Investigator: Renaud Vialet Assistance Publique - Hôpitaux de Marseille
  More Information

Responsible Party: Assistance Publique Hopitaux De Marseille
ClinicalTrials.gov Identifier: NCT00920673     History of Changes
Other Study ID Numbers: 2009/06
2009-A00163-54
First Submitted: June 9, 2009
First Posted: June 15, 2009
Last Update Posted: February 25, 2014
Last Verified: February 2014

Keywords provided by Assistance Publique Hopitaux De Marseille:
child