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- Registro de ensayos clínicos de EE. UU.
- Ensayo clínico NCT01380418
Factors Associated With Chronic Respiratory Failure in Obesity
Factors Associated With Chronic Respiratory Failure in Obesity: A Cross-sectional Study
Some overweight individuals develop problems with their breathing such that they gradually breathe less and less. This leads to a lack of oxygen and a buildup of carbon dioxide in the blood, called ventilatory failure. As a consequence, if such a person develops a chest infection, they are more likely to become seriously ill and need intensive care. In addition they are much more likely to develop severe complications during and following operations. This problem can be treated with a machine at home used overnight to help breathing. It is interesting that ventilatory failure only happens in some overweight individuals, and the investigators do not understand what factors make this complication develop. There are a number of theories: for example the distribution of the fat, additional lung disease (such as asthma), the addition of obstructive sleep apnoea, a condition when there are periods of cessation of breathing overnight (which is more common in obese individuals), weak muscles of breathing (perhaps due to fatty infiltration of muscles or vitamin D deficiency), and other hormonal changes.
The investigators intend to measure many potential factors in a range of overweight individuals, some who have ventilatory failure, and some who do not, to try and work out which are the important factors that cause this problem. If the investigators can identify such factors, then this will help predict in advance who is at risk from chest infections and during operations; thus allowing for earlier provision of an overnight breathing machine. This should reduce complications and potentially deaths in such individuals.
Descripción general del estudio
Estado
Condiciones
Descripción detallada
Tipo de estudio
Inscripción (Actual)
Contactos y Ubicaciones
Ubicaciones de estudio
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Oxford, Reino Unido, OX3 7LJ
- Oxford Radcliffe NHS Trust Hospitals
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Método de muestreo
Población de estudio
Obese (BMI > 30kg/m2) with or without OHS (18-85yrs)
- Admitted for management of OHS
- Attending the sleep and ventilation clinic
- Being assessed for bariatric surgery
Descripción
Inclusion Criteria:
- Obese (BMI > 30) with or without obesity hypoventilation
- (OHS) (18 - 85yrs)
- Admitted for management of their OHS
- Attending the sleep and ventilation clinic
- Being assessed for bariatric surgery
- Willing and able to give informed consent for participation in the study
- Men and women aged 18 - 85 years
Exclusion Criteria:
- Respiratory acidosis pH <7.30
- Severe untreated hypothyroidism
- Current treatment with theophylline
- Current treatment with diuretics
- Severe restrictive or obstructive lung disease (<30% predicted)
- Severe comorbidities such as moderate/severe COPD, left sided heart failure, and primary CNS or neuromuscular diseases
- Contraindications to MRI scanning
- Contraindications to DXA scanning
- Previous participant in research in the last 12 months
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
Cohortes e Intervenciones
Grupo / Cohorte |
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Study group
Obese BMI>30 18-85 years old
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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To determine the physiological between obese patients with OHS and obese patients without OHS
Periodo de tiempo: 1 year
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This will be a detailed ventilatory drive measurements and muscle strength testing.
The comparison will be made within the group amongst the range of ventilatory failure
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1 year
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Colaboradores e Investigadores
Patrocinador
Investigadores
- Director de estudio: John Stradling, FRCP MBBS PHD, University of Oxford
Publicaciones y enlaces útiles
Publicaciones Generales
- Dattani RS, Swerner CB, Stradling JR, Manuel AR. Exploratory study into the effect of abdominal mass loading on airways resistance and ventilatory failure. BMJ Open Respir Res. 2016 Jun 9;3(1):e000138. doi: 10.1136/bmjresp-2016-000138. eCollection 2016.
- Manuel AR, Hart N, Stradling JR. Correlates of obesity-related chronic ventilatory failure. BMJ Open Respir Res. 2016 Feb 18;3(1):e000110. doi: 10.1136/bmjresp-2015-000110. eCollection 2016.
- Manuel ARG, Hart N, Stradling JR. Is a raised bicarbonate, without hypercapnia, part of the physiologic spectrum of obesity-related hypoventilation? Chest. 2015 Feb;147(2):362-368. doi: 10.1378/chest.14-1279.
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
- Enfermedades del Sistema Nervioso
- Enfermedades de las vías respiratorias
- Apnea
- Trastornos de la respiración
- Trastornos del Sueño Intrínsecos
- Disomnias
- Trastornos del sueño y la vigilia
- Sobrenutrición
- Trastornos Nutricionales
- Exceso de peso
- Peso corporal
- Signos y Síntomas Respiratorios
- Síndromes de apnea del sueño
- Apnea del Sueño Obstructiva
- Obesidad
- Insuficiencia respiratoria
- Hipoventilación
- Síndrome de hipoventilación por obesidad
Otros números de identificación del estudio
- 11/H0605/9
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