Assessment Study of Faciocraniosynostosis by Craniofacial Osteodistraction

Study Overview
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Brief Summary
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Context. Faciocraniosynostoses present with an insufficient growth of the craniofacial skeleton due to premature fusion of skull and facial sutures. There are prenatal conditions with functional (risk of raised intracranial pressure) and morphological consequences (exorbitism, and impairment of upper respiratory airways), the severity of which justifies an early surgical treatment based on craniofacial osteotomies and osteodistraction techniques. Distraction techniques were started in our unit eleven years ago, and never ceased to be modified: Recent improvements allowed better correction of exorbitism and therefore reduction of visual risks. But the improvements of the respiratory function remain insufficient. The initial evaluations of the respiratory functions were based on blood oxygenation monitoring, and showed real improvement. But we have routinely screened our patients with complete polysomnography examinations for the past year, and this has always revealed the existence of severe sleep apnea syndromes that we fail to correct completely, although there were slightly improved. The aim of this PHRC protocol is : the qualitative and quantitative improvement of the respiratory status with a reinforced task force group including the specialists in genuine multidisciplinary approach. A modification of the surgical technique including modifications of the existing distraction devices, an increased number of implanted devices, and maybe a change in the surgical strategy.

Detailed Description
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Study design. This is a monocentric study, the patient being its own control. Due to the extremely low incidence of these conditions, it is foreseen to include twelve patients per year, during two years, which represent 24 patients in total with a minimum follow-up of one year. Evaluation criteria. The main evaluation criteria are the polysomnography variables (sleep apnea index, characterization of obstructive versus central respiratory events, the oxygenation pattern through the night), which will be performed before and after surgery (6 and 12 months post-op). The secondary criteria are the exorbitism correction analysed with the globe protrusion index and the rate of infections. A multidisciplinary task force group has already been structured in Necker Hospital. Expected results. We expect to analyze and correct all the sleep apnea syndromes. Many modifications could be made on the distractors, including removal of the activation rods, bioresorbable parts, as well as the modification of the surgical techniques.

Official Title
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Respiratory Improvement of Faciocraniosynostosis by Craniofacial Osteodistraction

Conditions
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Faciocraniosynostoses

Intervention / Treatment
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* Device: Osteodistraction techniques


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: age under 18 years faciocraniosynostosis surgery indication to craniofacial osteotomies informed consent social security Exclusion Criteria: no possibilities of follow-up during one year post-surgery history of radiotherapy acquired or hereditary immunodeficiency syndromes mental retardation bone conditions could not support distractors

Ages Eligible for Study
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Maximum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Osteodistraction techniques<br>Osteodistraction techniques | Device: Osteodistraction techniques<br>* Treatment based on craniofacial osteotomies and osteodistraction techniques.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Improvement of respiratory function |  | 6 months and 1 year | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Otorhinolaryngology events |  | 6 months and one year | 
| Post-surgery infections |  | post surgery | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Exorbitism, Upper respiratory airways, Osteodistraction, Polysomnography