Obstructive sleep apnea syndrome (OSA) is a sleep-related breathing disorder defined by repetitive episodes of apnea and hypopnea. These traits include anatomical (narrow/crowded/collapsible upper airway) and nonanatomical (waking up too easily during airway narrowing \[a low respiratory arousal threshold\], ineffective or reduced pharyngeal dilator muscle activity during sleep, and unstable ventilatory control \[high loop gain\]) components. Oropharyngeal training reduces the snoring times, Apnea-hypopnea Index (AHI) and daytime sleepiness. There is lack of good evaluating tools to distinguish different phenotypes of OSA and the efficacy of combined therapy. The purposes of our study are (1) to evaluate OSA patient by using Polysomonogrphy (PSG), force sensing resistor (FRS), Drug induce sleep endoscopy (DISE) and CT and muscle strength testing, (2) to know the exercise times by using FSR and (3) the efficacy of exercise in different groups.
Subjects who are newly diagnosed with mild to severe OSA (AHI \>5/h), and the physician will explain the treatment programs to every subject. By the result of muscle strength testing, the subjects will be classified as low muscle strength and normal groups. The myofunctional therapy program will begin at 6 week after surgery, and subjects will undergo 12 weeks of the home-based oropharyngeal myofunctional therapeutic training. During the training intervention period, subjects will be interviewed one time per week for adjusting the treatment intensity. Expected results：The hypothesis of this study is the efficacy of exercise would be less in the low muscle strength OSA patient than normal.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
28
Tongue base reduction surgery which remove the extra soft tissue of the base of the tongue and soft palate in this study
National Cheng Kung University Hospital
Tainan, Please Select, Taiwan
Change from Baseline Apnea and Hypopnea index (AHI) at post op 6 weeks and 18 weeks
Polysomnography included electroencephalographic, electro-oculographic, thoracic and abdominal respiratory inductance plethysmography and body position sensor to confirm the sleeping stage in one-night observation. Above measurements will be aggregated to arrive AHI.
Time frame: through study completion, an average of 18 weeks
Change from Baseline Volume from hard palate to the base of epiglottis in computer tomography (CT) at post op 6 weeks and 18 weeks
All patients underwent CT in a supine position. Each patient was instructed to maintain his/her tongue in the resting position, without swallowing, during CT. Volume from hard palate to the base of epiglottis was measured.
Time frame: through study completion, an average of 18 weeks
Change from Baseline Cross section area on the tip of epiglottis in computer tomography (CT) at post op 6 weeks and 18 weeks
All patients underwent CT in a supine position. Each patient was instructed to maintain his/her tongue in the resting position, without swallowing, during CT. Cross section area on the tip of epiglottis was measured.
Time frame: through study completion, an average of 18 weeks
Change from Baseline Anterior to posterior distance on the tip of epiglottis in computer tomography (CT) at post op 6 weeks and 18 weeks
All patients underwent CT in a supine position. Each patient was instructed to maintain his/her tongue in the resting position, without swallowing, during CT. Anterior to posterior distance on the tip of epiglottis was measured.
Time frame: through study completion, an average of 18 weeks
Change from Baseline Lateral distance on the tip of epiglottis in computer tomography (CT) at post op 6 weeks and 18 weeks
All patients underwent CT in a supine position. Each patient was instructed to maintain his/her tongue in the resting position, without swallowing, during CT. Anterior to posterior distance on the tip of epiglottis was measured.
Time frame: through study completion, an average of 18 weeks
Change from Baseline Drug-induced sleep endoscopy (DISE) at post op 6 weeks and 18 weeks
DISE was carried out by an experienced ENT surgeon in a semi-dark and quiet operating room with the patient supine lying on a hospital bed. Artificial sleep was induced by intravenous injection of propofol and midazolam (bolus injection of 1.5 mg) through a target-controlled infusion system (1.5 to 3.0 lg/mL), intending to the transition to unconsciousness with beginning of snoring and with the examiner evaluating decreased muscle reflexes of the eyelid. The severity of collapse in the upper airway was assessed by the surgeon.
Time frame: through study completion, an average of 18 weeks
Change from Baseline Muscle Strength of Jaw at post op 6 weeks and 18 weeks
Muscle strength of jaw was measured with a 'handheld' dynamometer (MicroFET○R2, Hoggan Scientific, USA) mounted on an adapted ophthalmic examination frame, to avoid alterations in chin and head position and to ensure consistent compression.
Time frame: through study completion, an average of 18 weeks
Change from Baseline Muscle strength of tongue at post op 6 weeks and 18 weeks
The muscle strength of the tongue was evaluated by the IOPI system, model 2.2 (Northwest, Co., LLC, Carnation, WA, USA).
Time frame: through study completion, an average of 18 weeks
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