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RESULT (REflux Surgery in Lung Transplantation) Preliminary Study Protocol (RESULT)

10 de septiembre de 2014 actualizado por: Duke University

Prospective and Retrospective Study to Develop a Multi-center Randomized Study, to Determine if Prevention of GERD Related Aspiration by Surgical Fundoplication Improves Lung Allograft Function

The purpose of the prospective study is to collect information surrounding lung transplant in order to develop a randomized study to determine if prevention of gastroesophageal reflux disease (GERD) related aspiration (stomach acid coming up from the stomach into the esophagus) by surgical fundoplication improves lung rejection. Lung transplantation has evolved into an effective treatment for patients with end-stage lung disease; however, a significant limitation to long-term survival is patients develop a condition of scarring known as chronic lung rejection, which can cause lung function to deteriorate, thereby reducing a patient's chances for survival. Preliminary research has shown a correlation between the presence of gastroesophageal reflux disease (GERD) and impaired early lung rejection as assessed by a breathing test, FEV1 (the amount of forced expired air volume in 1 second).

The Investigator is interested in learning more about this condition and the potential for aspiration (inhaling fluid) injury. The primary goal of this preliminary study will be to identify aspiration markers that are correlated with adverse clinical outcomes (increased early rejection, decreased FEV1) that may be used as inclusion criteria for the future randomized trial.

The purpose of the retrospective study is to collect information surrounding lung transplant in order to develop a randomized study to determine if prevention of gastroesophageal reflux disease (GERD) related aspiration (stomach acid coming up from the stomach into the esophagus) by surgical fundoplication improves lung rejection.

The goal of this retrospective data collection is to review the following:

  1. subject outcome event rates for subjects with and without gastroesophageal reflux disease (GERD) for survival, Bronchiolitis Obliterans Syndrome (BOS), acute rejection and Forced Expiratory Volume in the first second (FEV-1),
  2. the estimated treatment effect of fundoplication on the above event rates,
  3. a threshold effect for Bronchiolitis Obliterans Syndrome (BOS) and/or death are more likely to occur at higher or more proximal acid or non-acid contact times.

This data will be collected in order to better design and coordinate a multicenter prospective study.

Descripción general del estudio

Descripción detallada

Prospective Group: Approximately 125 Bronchoalveolar Lavage (BAL) samples will be collected from eligible subjects at the time of clinical bronchoscopies and will be within 2 weeks of their esophageal study. The Bronchoalveolar Lavage (BAL) samples will be assayed for bile acids; pepsin, pepsinogen I and II; trypsin; gastrin, and Lipopolysaccharide (LPS) content. Short-term clinical outcome measures including acute rejection episodes, and Forced Expiratory Volume in the first second (FEV-1) at one year will be collected. Correlation between markers of reflux and aspiration will be analyzed.

Retrospective Group: Up to 800 charts within the past 5 years will be reviewed for 1) subject outcome event rates for subjects with and without Gastroesophageal Reflux Disease (GERD) for survival, Bronchiolitis Obliterans Syndrome (BOS), acute rejection and Forced Expiratory Volume in the first second (FEV-1), 2) what is the estimated treatment effect of fundoplication on the above event rates, 3) is there a threshold effect such that events such as BOS and death are more likely to occur only at higher or more proximal acid or non-acid contact times. This review will better address the role of Gastroesophageal Reflux Disease (GERD) in lung allograft failure, the clinical utility of surgical fundoplication in preventing lung allograft injury, and the role that acid and non-acid reflux as related to aspiration causes lung allograft injury as it relates to a wider population.

Tipo de estudio

De observación

Inscripción (Actual)

647

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

    • Ontario
      • Toronto, Ontario, Canadá, M5G2C4
        • University of Toronto
    • Maryland
      • Baltimore, Maryland, Estados Unidos, 21287
        • Johns Hopkins University School Of Medicine
    • North Carolina
      • Durham, North Carolina, Estados Unidos, 27710
        • Duke University Medical Center
    • Ohio
      • Cleveland, Ohio, Estados Unidos, 44195
        • Cleveland Clinic

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

16 años y mayores (Niño, Adulto, Adulto Mayor)

Acepta Voluntarios Saludables

No

Géneros elegibles para el estudio

Todos

Método de muestreo

Muestra no probabilística

Población de estudio

Male or non-pregnant female subject ≥16 years of age with a double-lung transplant who have undergone a 24-hour esophageal pH and/orimpedance probe study within 12 months prior to transplant and/or within 12 months following transplantation.

Descripción

Inclusion Criteria:

  1. Male or non-pregnant female subject
  2. 16 years of age
  3. Recipient of a double-lung transplant
  4. Previously have a 24-hour esophageal pH and/or impedance probe study within 12 months prior to transplant and/or within 12 months following transplantation. If the subject expired prior to 12 months from transplant date, they must have had a 24-hour esophageal pH and/or impedance probe study to be eligible in the study.

Exclusion Criteria:

  1. Recipient of a single-lung transplant
  2. Recipient of a re-do lung transplant
  3. Recipient of a double-lung/heart or double-lung/ other organ transplant
  4. Do not have a 24-hour esophageal pH and/or impedance probe study within 12 months pre-transplant or within 12 months following transplantation. The subject expired less than 12 months post transplant without having a 24-hour esophageal pH and/or impedance probe study
  5. No Spirometry data is available for the subject
  6. Subject who is participating in any other interventional clinical study
  7. Unable to provide written informed consent or participate in long-term follow-up

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

Cohortes e Intervenciones

Grupo / Cohorte
Prospective Group
Those patients that will be consented and data collected prospectively
Retrospective Group
Those charts that will be utilized to collect retrospective data, waiver of consent will be granted by the IRBs.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
BAL aspiration markers
Periodo de tiempo: 1 year
For the prospective study analysis, we will be assessing the relationship of gastroesophageal reflux and aspiration post lung transplantation with the occurrence of lung allograft dysfunction by reviewing BAL samples prospectively collected in approximately 125 subjects. These BAL samples will be assayed for bile acids; pepsin, pepsinogen I and II; trypsin; gastrin, and LPS content. The correlation of the aspiration biomarkers to acute rejection, BOS, death and FEV-1 at one year will be assessed.
1 year
Death
Periodo de tiempo: 1 year
For the retrospective study, the first specific goal of data collection is outcome event rates for subjects with and without GERD for survival and the estimated treatment effect of fundoplication on the above event rates. A threshold effect for death is more likely to occur at higher or more proximal acid or non-acid contact times. Up to 5 years of follow-up data will be available for analysis with the primary comparison at one year. These data will be used to better design and coordinate a multicenter prospective study.
1 year
BOS
Periodo de tiempo: 1 year
For the retrospective study, the second specific goal of data collection is event rates for subjects with and without GERD for BOS and the estimated treatment effect of fundoplication on the above event rates. A threshold effect for BOS is more likely to occur at higher or more proximal acid or non-acid contact times. Up to 5 years of follow-up data will be available for analysis with the primary comparison at one year. These data will be used to better design and coordinate a multicenter prospective study.
1 year
FEV-1
Periodo de tiempo: 1 year
For the retrospective study, the third goal of data collection is evaluation of FEV-1 changes for subjects with and without GERD and the estimated treatment effect of fundoplication. Up to 5 years of follow-up data will be available for analysis with the primary comparison at one year. Data will be used to design a multicenter prospective study, address the role of GERD in lung allograft failure, the clinical utility of surgical fundoplication in preventing lung allograft injury, and the role that acid and non-acid reflux as related to aspiration causes lung allograft injury.
1 year
Acute Rejection
Periodo de tiempo: 1 year
For the retrospective study, the final goal of data collection is evaluation of acute rejection episodes for subjects with and without GERD and the estimated treatment effect of fundoplication. Up to 5 years of follow-up data will be available for analysis with the primary comparison at one year. Data will be used to design a multicenter prospective study and to address the role of GERD in lung allograft failure, the clinical utility of surgical fundoplication in preventing lung allograft injury, and the role that acid and non-acid reflux as related to aspiration causes lung allograft injury.
1 year

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Investigadores

  • Investigador principal: Robert D. Davis, MD, Duke University

Publicaciones y enlaces útiles

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Publicaciones Generales

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio

1 de septiembre de 2011

Finalización primaria (Actual)

1 de junio de 2013

Finalización del estudio (Actual)

1 de agosto de 2013

Fechas de registro del estudio

Enviado por primera vez

28 de junio de 2011

Primero enviado que cumplió con los criterios de control de calidad

29 de julio de 2011

Publicado por primera vez (Estimar)

1 de agosto de 2011

Actualizaciones de registros de estudio

Última actualización publicada (Estimar)

12 de septiembre de 2014

Última actualización enviada que cumplió con los criterios de control de calidad

10 de septiembre de 2014

Última verificación

1 de septiembre de 2014

Más información

Términos relacionados con este estudio

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