Assessing the Symptoms of Obstructive Sleep Apnea (OSA)
16 июня 2014 г. обновлено: Bangor University
Association of Health Outcomes With Severity of OSA Symptomatology- a Correlation Study.
The purpose of this study is to investigate the correlation between health outcomes associated with the severity of obstructive sleep apnea (OSA) symptomatology, the findings will guide the design of interventional studies.
Обзор исследования
Статус
Завершенный
Условия
Подробное описание
Obstructive sleep apnea is a condition characterised by periods of narrowing of the pharyngeal airways during sleep causing hypoxic and hypercapnic episodes with the cessation of ventilation.
Considering the high number of overweight and obese individuals in Western society the understanding of the pathomechanisms behind OSA are important.
This observational study aims to investigate the correlations between the severity of Obstructive Sleep Apnea assessed by the apnea-hypopnea index (AHI) and different health outcomes associated with the OSA.
Тип исследования
Наблюдательный
Регистрация (Действительный)
66
Контакты и местонахождение
В этом разделе приведены контактные данные лиц, проводящих исследование, и информация о том, где проводится это исследование.
Места учебы
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Gwynedd
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Bangor, Gwynedd, Соединенное Королевство, LL57 2PW
- Betsi Cadwaladr University Health Board
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Критерии участия
Исследователи ищут людей, которые соответствуют определенному описанию, называемому критериям приемлемости. Некоторыми примерами этих критериев являются общее состояние здоровья человека или предшествующее лечение.
Критерии приемлемости
Возраст, подходящий для обучения
От 18 лет до 70 лет (Взрослый, Пожилой взрослый)
Принимает здоровых добровольцев
Нет
Полы, имеющие право на обучение
Мужской
Метод выборки
Невероятностная выборка
Исследуемая популяция
Mild to severe recently diagnosed Obstructive Sleep Apnea patients selected by physician who have not received any treatment for their condition.
Selected from Ysbyty Gwynedd in North Wales.
Описание
Inclusion Criteria:
- Body Mass Index ≤39
- Not received any treatment for Obstructive Sleep Apnea.
- Is a non-smoker
- Is not epileptic
- Epworth Sleepiness Scale ≥ 10.
- Patient's on Statins or antihypertensive drugs are included as so frequent in OSA.
Exclusion Criteria:
- Body Mass Index ≥ 39.
- Presence of significant or unstable Renal, Liver or Heart Failure.
- Receiving anti-diabetic treatment.
- Is a smoker.
- Is epileptic
- Presence of significant or unstable psychological morbidities.
Учебный план
В этом разделе представлена подробная информация о плане исследования, в том числе о том, как планируется исследование и что оно измеряет.
Как устроено исследование?
Детали дизайна
Когорты и вмешательства
Группа / когорта |
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No treatment, OSA (AHI >15)
Patients with OSA recruited prior to receiving NHS treatment.
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Что измеряет исследование?
Первичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
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Apnea-Hypopnea Index (AHI)
Временное ограничение: one night within four weeks of study.
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AHI refers to how is the number of apneas and hypopneas per an hour of sleep.
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one night within four weeks of study.
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Вторичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
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Residual volume
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Volume of air remaining in lungs after full expiration
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Within four weeks of recruitment prior to CPAP treatment
|
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Functional residual volume
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Air present in lungs at the end of passive expiration
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Within four weeks of recruitment prior to CPAP treatment
|
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Total lung capacity
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Total volume of lungs
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Within four weeks of recruitment prior to CPAP treatment
|
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Forced Vital capacity
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
|
Maximum amount of air which can be expired from the lungs following a full inspiration
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Within four weeks of recruitment prior to CPAP treatment
|
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Forced expiratory volume in one second (FEV1)
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Maximum amount of air which can be expired from the lungs in one second.
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Within four weeks of recruitment prior to CPAP treatment
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Airway Resistance
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Opposition of flow caused by forces of friction.
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Within four weeks of recruitment prior to CPAP treatment
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Plasma 2-arachidonoylglycerol (2-AG)
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment.
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Ligand of the G-protein coupled CB1 and CB2 receptors, has been found to be correlated with Oleylethanolamide (OEA) in OSA patients have various effects on energy metabolism.
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Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment.
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Plasma Anandamide (ANA)
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
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Ligand of the G-protein coupled CB1 and CB2 receptors, found to be correlated with blood pressure in OSA after the adjustment of confounding variables.
Have various effects on energy metabolism.
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Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
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Plasma oleoylethanolamine (OEA)
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
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A lipid mediator which acts as an anorexigenic (appetite suppressant), and is elevated with sleep deprivation.
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Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
|
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Plasma Leptin
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
|
Circulating protein produced in adipose tissue.
Elevated in OSA and obesity.
Leptin may reduce respiratory depression.
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Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
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Plasma Adiponectin
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
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Hormone secreted by adipocytes (Fat cells).
Adiponectin is closely linked to metabolism and may have anti-inflammatory properties.
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Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
|
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Plasma C-reactive Protein
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
|
Marker of inflammation.
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Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
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Insulin
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
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Hormone which causes liver and muscle and fat cells to take up glucose to convert to glycogen.
OSA is associated with insulin resistance.
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Within four weeks of recruitment prior to CPAP treatment and after four weeks of CPAP treatment
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Neck circumference
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Within four weeks of recruitment prior to CPAP treatment
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Waist circumference
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
|
Within four weeks of recruitment prior to CPAP treatment
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Hip circumference
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Within four weeks of recruitment prior to CPAP treatment
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Weight
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Within four weeks of recruitment prior to CPAP treatment
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Fat-free mass
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Non-fat components of the human body estimated non-invasively using a bioimpedance measurement system.
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Within four weeks of recruitment prior to CPAP treatment
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Fat mass
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Fat components of the human body estimated non-invasively using bioimpedance measurement system.
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Within four weeks of recruitment prior to CPAP treatment
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Maximal Inspiratory pressure
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
|
Measured at residual volume, reflects the strength of the diaphragm and other inspiratory muscles.
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Within four weeks of recruitment prior to CPAP treatment
|
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Rate of inspiratory muscle fatigue
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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The decline in maximal inspiratory pressure following inspiration against a resistance.
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Within four weeks of recruitment prior to CPAP treatment
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Chest RPE
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Rating of perceived exertion in the chest and associated airways during the inspiratory fatigue protocol.
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Within four weeks of recruitment prior to CPAP treatment
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Dyspnea
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Rating of breathlessness half way through fatigue protocol and at the end of protocol.
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Within four weeks of recruitment prior to CPAP treatment
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Ventilation with 25% O2/ 6% CO2
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Measures the breathing response to high oxygen and high CO2 therefore assessing the central chemoreceptors response only.
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Within four weeks of recruitment prior to CPAP treatment
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Ventilation with 13% O2
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
|
Measures the breathing response to low oxygen.
Designed to Assess the response to the peripheral chemoreceptors.
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Within four weeks of recruitment prior to CPAP treatment
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Ventilation with 13% O2 / 6% CO2
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
|
Measures the breathing response to low oxygen and high CO2.
Designed to assess the response of the sum of the peripheral and central chemoreceptors
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Within four weeks of recruitment prior to CPAP treatment
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Mean RR interval
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Time domain measure: Average time interval between the heart beats R waves
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Within four weeks of recruitment prior to CPAP treatment
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SDNN
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Time domain measure: The standard deviation of all RR intervals
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Within four weeks of recruitment prior to CPAP treatment
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NN50 count
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Time domain measure: The number of pairs of adjacent RR intervals differing by more than 50 ms in the entire analysis interval.
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Within four weeks of recruitment prior to CPAP treatment
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NN50 of total HR (%)
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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Time domain measure: NN50 count divided by total number of all RR intervals.
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Within four weeks of recruitment prior to CPAP treatment
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HRV triangular index
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment
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The total number of RR intervals divided by maximum height of the histogram excluding boundaries.
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Within four weeks of recruitment prior to CPAP treatment
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Low frequency domain
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment.
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Frequency domain analysis: represents 0.04-0.15
Hz reflecting sympathetic activity.
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Within four weeks of recruitment prior to CPAP treatment.
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High frequency domain
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment.
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Frequency domain analysis: represents 0.15-0.40
Hz reflecting parasympathetic activity.
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Within four weeks of recruitment prior to CPAP treatment.
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LF/HF ratio
Временное ограничение: Within four weeks of recruitment prior to CPAP treatment.
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The ratio of low frequency (0.04 - 0.15 Hz) to high (0.15-0.40 Hz) frequency recordings.
|
Within four weeks of recruitment prior to CPAP treatment.
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Соавторы и исследователи
Здесь вы найдете людей и организации, участвующие в этом исследовании.
Спонсор
Следователи
- Главный следователь: Christopher MN Earing, MSc, School of Sport, Health and Exercise Sciences, Bangor University
Даты записи исследования
Эти даты отслеживают ход отправки отчетов об исследованиях и сводных результатов на сайт ClinicalTrials.gov. Записи исследований и сообщаемые результаты проверяются Национальной медицинской библиотекой (NLM), чтобы убедиться, что они соответствуют определенным стандартам контроля качества, прежде чем публиковать их на общедоступном веб-сайте.
Изучение основных дат
Начало исследования
1 ноября 2011 г.
Первичное завершение (Действительный)
1 июня 2014 г.
Завершение исследования (Действительный)
1 июня 2014 г.
Даты регистрации исследования
Первый отправленный
24 ноября 2011 г.
Впервые представлено, что соответствует критериям контроля качества
24 ноября 2011 г.
Первый опубликованный (Оценивать)
29 ноября 2011 г.
Обновления учебных записей
Последнее опубликованное обновление (Оценивать)
17 июня 2014 г.
Последнее отправленное обновление, отвечающее критериям контроля качества
16 июня 2014 г.
Последняя проверка
1 июня 2014 г.
Дополнительная информация
Термины, связанные с этим исследованием
Ключевые слова
Дополнительные соответствующие термины MeSH
Другие идентификационные номера исследования
- REC No: 11/WNo:01/2
- Earing 11/WNo01/2 (Другой идентификатор: North West Wales Research Ethics Committee)
Эта информация была получена непосредственно с веб-сайта clinicaltrials.gov без каких-либо изменений. Если у вас есть запросы на изменение, удаление или обновление сведений об исследовании, обращайтесь по адресу register@clinicaltrials.gov. Как только изменение будет реализовано на clinicaltrials.gov, оно будет автоматически обновлено и на нашем веб-сайте. .