Genioglossus Muscle Training for Snoring and Obstructive Sleep Apnea

Not Applicable

Completed

• Conditions: Sleep Apnea, Obstructive; Snoring
• Interventions: Device: Genioglossis Strength Trainer; Device: Placebo Genioglossis Strength Trainer

• Registration Number: NCT02834767
• Lead Sponsor: University of Florida

Brief Summary

Obstructive sleep apnea (OSA) carries serious health consequences for patients. Evidence exists that some behavioral (e.g. exercise based) therapies may assist in lessening the severity of this disorder. The proposed investigation will examine the effects of eight weeks of genioglossus muscle strength training on measures of snoring and OSA severity as well as genioglossus protrusive muscle strength.

Detailed Description

Obstructive sleep apnea (OSA) is a common disorder characterized by intermittent narrowing or closure of the upper airway during sleep. Loss of muscle tone with sleep onset and decreases in ventilatory drive following the loss of the wakefulness stimuli to breathe combine to result in upper airway closure in patients with structurally susceptible upper airways. The genioglossus (GG, tongue) muscle plays an important role in maintaining upper airway patency. The GG is responsible for tongue protrusion and stiffens the tongue and prevents posterior tongue displacement and upper airway closure. The GG is a phasic respiratory muscle. One can demonstrate inspiratory bursts in GG EMG activity slightly preceding the onset of inspiratory activity of respiratory pump muscles. The inspiratory bursts of GG activity also increase in response to negative pressure in the upper airway to help maintain upper airway patency. In some OSA patients this response is blunted. While one study did not find a difference in protrusion muscle strength between a group of OSA patients (apnea hypopnea index, AHI = 20/hour) and normal controls (Mortimore et al) there was wide variability in muscle strength at similar AHI values. Another study (Oh et al) did find a correlation between tongue protrusion strength and the apnea index (lower strength, higher apnea index). It is hypothesized that strength training of the GG will reduce snoring and sleep apneas by augmenting the resting GG tone and enhancing the ability of the muscle to respond to negative upper airway pressure. Training of upper airway muscles including the tongue is often used in rehabilitation of patients with prior cerebrovascular accidents or damage due to surgical resection for cancer. Typically, the patient presses the tongue against the back of the upper teeth (direction both upward and forward). However, it is believed that tongue protrusion is best trained by active forward protrusion of the tongue between the teeth under load. To facilitate GGs training participants will push a spring loaded piston forward with the tongue. The piston fits inside an outer chamber. The piston can also be connected to a force measuring device to estimate protrusive tongue force.

Two groups of participants will be examined: Group 1: primary snoring and Group 2: mild to moderate OSA patients (apnea-hypopnea index \< 30/hour) who are not severely obese (BMI \< 40 Kg/M2) and do not have significant structural abnormalities of the upper airway or muscle dysfunction. This preliminary investigation consists of a randomized controlled trial (training versus sham training) with two months of daily training (5 out of 7 days each week). A home sleep study (including EEG) will be performed before and following the training. The change in the apnea-hypopnea index adjusted for sleep stage and body position will be compared. Use of home sleep studies will dramatically reduce the cost of the study. A sleep technologist will educate subjects on performance of training maneuvers and meet with them weekly to observe the subject's technique and measure tongue strength. A training log will be kept by the subjects using training schedule sheets and training will be directly monitored at least 2 times weekly through with a study clinician (electronically via facetime, skype or by direct observation).

Study Timeline

• Study First Submitted: 2016-07-13
• Study First Submitted QC: 2016-07-14
• Study First Posted: 2016-07-15
• Study Start: 2016-10
• Primary Completion: 2019-05-04
• Study Completion: 2019-05-04
• Status Verified: 2020-02
• Last Update Submitted: 2020-02-04
• Last Update Posted: 2020-02-06

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 23

Inclusion Criteria

• Snoring + AHI < 5/hr (primary snoring group)
• AHI ≥ 5/hour and less than 30/hour (OSA group)
• Ability to understand and perform training.
• Ability to return to the UF Health Sleep Center 1X per week for the (8 week) duration of the study.

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Exclusion Criteria

• Pregnancy
• Prior Upper airway surgery (nasal surgery is allowed)
• Severe nasal obstruction
• BMI > 40 kg/M2
• Use of CPAP > 12 cm H2O *
• Use of potent narcotics
• History of arrhythmia (other than PACs and PVCs)
• Coronary artery disease or congestive heart failure (patients with controlled hypertension will be included),
• Moderate to severe lung disease
• History of pneumothorax.
• severe daytime sleepiness (falling asleep while driving or Epworth Sleepiness Scale > 14),
• History of chronic short sleep duration (< 5 hours).

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Group 1 Primary Snoring Treatment	Genioglossis Strength Trainer	Intervention: Eight weeks of supervised use of the genioglossus muscle strength trainer. Training will occur 5 days per week for 8 weeks. Each daily training regimen to consist of 5 sets of 5 repetitions (25 repetitions total daily) of tongue contractions using the device.
Group 2 Primary Snoring Placebo	Placebo Genioglossis Strength Trainer	Intervention: Eight weeks of supervised use of the placebo genioglossus muscle strength trainer. Training will occur 5 days per week for 8 weeks. Each daily training regimen to consist of 5 sets of 5 repetitions (25 repetitions total daily) of tongue contractions using the device.
Group 3 Primary OSA Treatment	Genioglossis Strength Trainer	Intervention: Eight weeks of supervised use of the genioglossus muscle strength trainer. Training will occur 5 days per week for 8 weeks. Each daily training regimen to consist of 5 sets of 5 repetitions (25 repetitions total daily) of tongue contractions using the device.
Group 4 Primary OSA Placebo	Placebo Genioglossis Strength Trainer	Intervention: Eight weeks of supervised use of the placebo genioglossus muscle strength trainer. Training will occur 5 days per week for 8 weeks. Each daily training regimen to consist of 5 sets of 5 repetitions (25 repetitions total daily) of tongue contractions using the device.

Primary Outcome Measures

Name	Time	Method
Maximum Tongue Pressure Force (MTPF)	Pre to post treatment (approximately 10 weeks)	Maximum pressure generated (in Newtons) during tongue protrusion

Secondary Outcome Measures

Name	Time	Method
Snoring Severity	Pre to post treatment (approximately 10 weeks)	Snoring sensor recording snoring frequency and amplitude during sleep
Apnea-Hypopnea Index	Pre to post treatment (approximately 10 weeks)	Episodes of apnea and/or hypopnea scored during the course of sleep study

Trial Locations

Locations (1)

University of Florida Sleep Center; 🇺🇸 Gainesville, Florida, United States