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Velopharyngeal InsufficiencyVPIMMANCT07301021

Velopharyngeal Insufficiency After Maxillomandibular Advancement Osteotomy in Obstructive Sleep Apnea Patients

An observational study of Velopharyngeal Insufficiency and Swallowing, run by Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) at 1 site in Netherlands.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

The aim of this study is to gain insight into the development of velopharyngeal insufficiency (VPI) in patients who have undergone maxillomandibular advancement osteotomy (MMA) as a treatment for obstructive sleep apnea syndrome (OSAS). Read more about this study

Who is it for?
Ages 18 years and olderHealthy volunteers can take part
Conditions the study is for
Velopharyngeal Insufficiency, Swallowing, Nasality
How many people
28 participants
Where
1 siteNetherlands
Study dates
1 May 2026to 1 Dec 2027
How long will I take part?
2 Years
Phase
Observational
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • Healthy volunteers accepted
  • Adult, Older adult

Study population: OSA patients who undergo a maxillomandibular advancement

Who may be able to join

  • Age > 18 years
  • Mild to severe OSA
  • Indication for MMA for OSA treatment

Who cannot join

  • patients who underwent other adjunctive procedures at the time of MMA (e.g., multipiece le Fort osteotomy, TMJ reconstruction
  • Previous history of orthognathic surgery
  • Previous history of orthognathic surgery
  • Previous history of oropharyngeal surgery (UPPP or multi-level surgery)
  • Cleft palate and syndromic patients
  • Neuromusculair diseases which causes VPI, dysphagia or dysarthria
  • Incapacity

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Misha Tan, PhD student contact

+31613125803

m.l.tan@amsterdamumc.nl

Netherlands1 site
  • Amsterdam UMC

    Amsterdam, North Holland

    Misha Tan, PhD student, +31613125803, m.l.tan@amsterdamumc.nl

Other trials in Netherlands

About this study

The aim of this study is to gain insight into the development of velopharyngeal insufficiency (VPI) in patients who have undergone maxillomandibular advancement osteotomy (MMA) as a treatment for obstructive sleep apnea syndrome (OSAS). A speech therapist evaluates nasality, speech, and swallowing before and after the surgery.

Read the detailed description

This study will be conducted at Amsterdam UMC. Adult patients with mild to severe obstructive sleep apnea syndrome (OSAS) who are eligible for maxillomandibular advancement (MMA) surgery will be invited to participate in this prospective cohort study. Patients will be evaluated by two speech therapists at four different time points: before surgery (T0), 6 weeks after surgery (T1), 3 months after surgery (T2), 6 months after surgery (T3) and 1 year after surgery (T4).

Patients will undergo objective assessments focusing on three components: nasality, speech, and swallowing. The Nasometer, a non-invasive analysis tool, will be used to measure the presence of nasality in speech production. Speech will be scored using the Cleft Audit Protocol for Speech - Augmented (CAPS-A), an instrument where speech therapists evaluate various aspects of speech performance. Swallowing will be assessed using the Functional Oral Intake Scale (FOIS), a scoring system that evaluates patients' swallowing abilities. Additionally, the swallowing speed/volume test will measure how quickly and how much water a patient can swallow. Thereby, for the subjective evaluation patients will receive the following questionnaires by email: OHIP-14 (oral health related quality of life), FOSQ (functional outcomes of sleep questionnaire), and the NSD (neurosensory disturbance questionnaire.

Keywords
maxillomandibular advancement, obstructive sleep apnea, velopharyngeal insufficiency, speech therapy, swallowing, nasality, speech
Medical subject headings
Velopharyngeal Insufficiency, Speech, Sleep Apnea, Obstructive, Communication Disorders

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

Study groups in NCT07301021
Study groupRoleWhat they receive
OSA patients after an MMAPatients with obstructive sleep apnea (OSA) who underwent a maxillomandibular advancement (MMA)

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Nasality

    Nasality is measured using the Nasometer. The outcome consists of three scores: oral, nasal, and mixed. The nasality score is expressed as a percentage (0-100%), where a higher score indicates greater nasality. These scores will be compared across five time points.

    Measured: Timpoints: T0 preoperative, T1 6 weeks after surgery, T2 3 months after surgery, T3 6 months after surgery, T4 1 year after surgery

Secondary outcomes (4)
  1. Swallowing

    FOIS (functional oral intake scale), swallow volume and swallow time will be evaluated by the speech therapist.

    The FOIS is used to describe the level of oral food and liquid intake in individuals with swallowing difficulties. The scale ranges from 0 to 7, where:

    0: Nothing by mouth (NPO) - the individual does not take any food or liquid orally.

    1. Tube dependent with minimal attempts of food or liquid - primarily tube-fed but may have some minimal oral intake.
    2. Tube dependent with consistent oral intake of food or liquid - mostly tube-fed but regularly takes some oral intake.
    3. Tube dependent with oral intake of food or liquid without special preparation - mostly tube-fed but oral intake is not modified.
    4. Total oral diet of a single consistency - the individual eats only one consistency of food or liquid.
    5. Total oral diet with multiple consistencies but requiring special preparation or compensations - eats various consistencies but with mod

    Measured: T0 preoperative, T1 6 weeks after surgery, T2 3 months after surgery, T3 6 months after surgery, T4 1 year after surgery

  2. Speech

    The Cleft Audit Protocol for Speech - Adult (CAPS-A) is a standardized assessment tool designed to evaluate speech outcomes in individuals with cleft lip and/or palate. It focuses on identifying speech characteristics commonly affected by cleft conditions, such as resonance, nasal emission, articulation, and overall speech intelligibility.

    What CAPS-A measures:

    Resonance: The degree of nasal quality in the voice (e.g., hypernasality or hyponasality).

    Nasal Emission: The presence of air escaping through the nose during speech, which can affect clarity.

    Articulation: Accuracy and clarity of speech sounds, especially those that may be distorted due to structural or functional issues.

    Overall Intelligibility: How well the speech can be understood by listeners.

    Outcome measures:

    CAPS-A uses a 5-point scale to rate the severity of certain speech characteristics, such as resonance and nasal emission, ranging from no impairment to severe impairment.

    Additionally, the presence or absen

    Measured: T0 preoperative, T1 6 weeks after surgery, T2 3 months after surgery, T3 6 months after surgery, T4 1 year after surgery

  3. Subjective outcomes: The Functional Outcomes of Sleep Questionnaire (FOSQ)

    Functional Outcomes of Sleep Questionnaire (FOSQ)

    The Functional Outcomes of Sleep Questionnaire (FOSQ) is a patient-reported outcome measure designed to assess the impact of excessive daytime sleepiness on daily activities and quality of life. It evaluates how sleep disorders affect a person's ability to carry out routine tasks and engage in social and occupational activities.

    What it measures:

    The FOSQ covers multiple domains including general productivity, activity level, vigilance, social outcomes, and intimacy/sexual relationships.

    It reflects the functional limitations caused by sleepiness rather than just sleep symptoms alone.

    Outcome measures:

    The FOSQ produces a total score and subscale scores for each domain. Scores typically range from 0 to 4 or 5 per item, with higher scores indicating better functional status and less impact of sleepiness.

    The total score summarizes overall functional status related to sleepiness, with lower scores reflecting greater impairment.

    Measured: T0 preoperative, T1 6 weeks after surgery, T2 3 months after surgery, T3 6 months after surgery, T4 1 year after surgery

  4. Subjective outcome: Neuro Sensory Disturbance Questionnaire

    Neuro Sensory Disturbance Questionnaire

    The Neuro Sensory Disturbance Questionnaire is used to assess sensory symptoms related to neurological conditions, such as numbness, tingling, burning, or altered sensation. It helps to quantify the presence and severity of sensory disturbances that may affect daily functioning.

    What it measures:

    The questionnaire evaluates the type, frequency, and intensity of sensory symptoms.

    It may also include questions on the impact of these symptoms on daily activities and quality of life.

    Outcome measures:

    Scores are often based on ordinal scales (e.g., 3- or 5-point scales) rating severity or frequency of symptoms.

    The questionnaire may provide subscale scores for different sensory modalities (e.g., pain, numbness).

    A total score can be calculated to reflect overall neuro-sensory disturbance, with higher scores indicating more severe or frequent symptoms.

    Measured: T0 preoperative T1 +6 weeks post op T2 +3 months post op T3 +6 months post op T4 +12 months post op

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted24 Dec 2025
  2. Study start1 May 2026 (estimated)
  3. Primary completion1 Dec 2027 (estimated)
  4. Study completion1 Dec 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Cohort
Time perspective
Prospective
Enrolment
28 participants (estimated)
Target duration
2 Years
IDs, dates and publications
ClinicalTrials.gov ID
NCT07301021
Sponsor's protocol ID
NL83076.018.23
Acronym
VPIMMA
Status last verified
Mar 2026
First submitted
30 Jul 2025
Last updated
20 Mar 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: The IPD will be shared with other researches: speech therapist and my supervisor.

Publications

  • Kummer AW, Marshall JL, Wilson MM. Non-cleft causes of velopharyngeal dysfunction: implications for treatment. Int J Pediatr Otorhinolaryngol. 2015 Mar;79(3):286-95. doi: 10.1016/j.ijporl.2014.12.036. Epub 2015 Jan 5.

    PubMed 25604261
  • Li KK, Troell RJ, Riley RW, Powell NB, Koester U, Guilleminault C. Uvulopalatopharyngoplasty, maxillomandibular advancement, and the velopharynx. Laryngoscope. 2001 Jun;111(6):1075-8. doi: 10.1097/00005537-200106000-00027.

    PubMed 11404624
  • Kummer AW. Types and causes of velopharyngeal dysfunction. Semin Speech Lang. 2011 May;32(2):150-8. doi: 10.1055/s-0031-1277717. Epub 2011 Sep 26.

    PubMed 21948641

Questions about this trial

What is this clinical trial studying?

An observational study of Velopharyngeal Insufficiency and Swallowing, run by Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) at 1 site in Netherlands.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: opening soon, as of the sponsor's last update on 20 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Netherlands. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Misha Tan, PhD student (+31613125803, m.l.tan@amsterdamumc.nl), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Nasality (time frame: Timpoints: T0 preoperative, T1 6 weeks after surgery, T2 3 months after surgery, T3 6 months after surgery, T4 1 year after surgery). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07301021, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 20 Mar 2026.

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