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RecruitingNCT02762175MMA-OSASUpdated Feb 28, 2022

3D Volumetric Changes in the Upper Airway After MMA in OSAS Patients and the Implication on QOL: A Prospective Registry

An observational study in Obstructive Sleep Apnea, sponsored by AZ Sint-Jan AV. Recruiting at 1 site in Belgium. Per ClinicalTrials.gov, last updated 2022-02-28.

Sponsored by AZ Sint-Jan AV · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
150
Sex
All
01

Study summary

Background

Obstructive sleep apnea syndrome (OSAS) is a sleep-related breathing disorder characterized by intense snoring and repetitive complete or partial obstructions of the upper airway during sleep together with daytime sleepiness. Several non-invasive therapeutical options exist, however, they do not offer a permanent improvement. Maxillomandibular advancement (MMA) surgery is a procedure which changes the upper airway in a permanent way.

Objectives

The investigators aim to develop a prospective database registering 3D volumetric changes of the upper airway and its anatomic subregions, the apnea-hypopnea index (AHI) and quality of life (QOL) of all consecutive patients eligible for MMA, performed by Dr. Neyt. Patient demographics, detailed virtual cone-beam computed tomography (CBCT) planning parameters, orthognathic surgery, polysomnographic and QOL data are being collected during consecutive visits within the framework of routine practice.

Design

A prospective, observational cohort study

Study center

General Hospital (AZ) Sint-Jan Brugge-Oostende

Population

The investigators would like to include all OSAS patients (AHI ≥ 5) requiring a MMA by Dr. Neyt starting from January 2015.

Endpoints

The investigators aim to collect data that could provide information about the advantages and disadvantages of the routinely performed 3D CBCT preoperative MMA surgery planning for OSAS patients, regarding 3D volumetric changes of the upper airway and its anatomic subregions and quality of life (QOL) in a subjective manner with the Epworth Sleepiness Scale (ESS) and the OSAS questionnaire and in an objective manner with evaluation of the apnea-hypopnea index (AHI).

Duration

In light of the continuous improvement of patient care, a database will be maintained from January 2015 onwards to enable registration of large-scale OSAS patient data.

Conclusions

Development of a database registering 3D CBCT planning, polysomnographic data and quality of life (QOL) of all consecutive patients eligible for MMA, will provide more information about potential patient, virtual planning and surgical factors influencing accuracy of MMA, and the associated biological benefits of this procedure on the upper airway volume, the AHI and general QOL. Moreover, registration of those results could function as a measurement of quality of care, or could be used for sample size calculation for future large multicenter prospective trials.

02

Conditions studied

  • Obstructive Sleep Apnea

Keywords

  • maxillomandibular advancement
  • obstructive sleep apnea
  • apnea-hypopnea index
  • quality of life
03

In context

Apnea

1,422 studies on the registry are indexed under Apnea; 159 are open to participants now.

This study's planned enrollment of 150 is above the median of 106 across 386 observational studies indexed under Apnea.

Browse Apnea studies →

Lead sponsor

AZ Sint-Jan AV is the lead sponsor of 58 studies on the registry; 14 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

all OSAS patients (AHI ≥ 5) requiring a MMA by Dr. Neyt starting from January 2015

Inclusion criteria

  • Patients of all ages
  • Patients of all genders
  • Patients diagnosed with OSAS, based on an AHI ≥ 5
  • All consecutive OSAS patients operated by N. Neyt from January 2015 onwards

Exclusion criteria

Exclusion Criteria:

  • Patients not eligible according to abovementioned criteria
  • Patients with morbid obesity (BMI >35), if judged non-eligible by the treating surgeon
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
150 participants (estimated)
Target follow-up
6 Months
Patient registry
Yes
06

What researchers measure

Primary outcomes

  1. postoperative apnea-hypopnea index, measured with polysomnography

    Time frame: 6-12 months

Secondary outcomes

  1. 3D volumetric changes of the upper airway, measured with cone-beam CT

    Time frame: 4-6 months

  2. quality of life, measured with epworth sleepiness scale

    Time frame: 4-12 months

  3. quality of life, measured with OSAS questionnaire

    Time frame: 4-12 months

07

Study locations

1 of 1 sites recruiting
  • Division of Maxillofacial Surgery, Department of Surgery, AZ Sint-Jan Brugge Oostende AV
    Bruges, Belgium
    • Araceli Diez-Fraile, MSc, PhD, VMD · Contact
    Recruiting
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 28, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02762175
Lead sponsor
AZ Sint-Jan AV
Responsible party
Nathalie Neyt (maxillofacial surgeon, AZ Sint-Jan AV) — Principal investigator
First posted
May 4, 2016
Start date
Jan 2015
Primary completion
Jan 2030 (estimated)
Completion
Jun 2030 (estimated)
Last update
Feb 28, 2022

Study contacts

Araceli Diez-Fraile, MSc, PhD, VMD
Contact
araceli.diez-fraile@azsintjan.be
Nathalie Neyt, MD
principal investigator · Division of Maxillofacial Surgery, Department of Surgery, AZ Sint-Jan Brugge-Oostende AV

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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