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AsthmaVent - Effect of Mechanical Ventilation on Asthma Control in Children (AsthmaVent)

11 maja 2016 zaktualizowane przez: University of Aarhus

AsthmaVent is a multi-center study, investigating the association between indoor air quality and childhood asthma.

In Denmark, we spend more and more time indoors. Our houses are built airtight to save energy and are difficult to ventilate. We are thus more exposed to our indoor air than ever before. We know that indoor air contains many different components that can affect our airways inappropriately and particularly children with asthma, who have sensitive airways are sensitive to these components. The AsthmaVent project examines whether increased ventilation is able to improve the indoor environment to such an extent that the asthma disease control, for children with asthma and house dust mite allergy improves, resulting in need for less medication.

Previous studies have pointed towards a beneficial effect of mechanical ventilation, on both the indoor air quality and on children's health and quality of life. There is not currently a consensus in this area, as studies so far have not been large or good enough to confidently determine the effect.

This project is big and is designed so that it takes into account the sources of error seen in previous studies on the topic.

We include, over a 3-year period (2012-2014), a total of 80 children with asthma and house dust mite allergy aged 6-18 years, from pediatric departments in Aarhus, Odense, Kolding, Randers and Herning. They are divided into two groups, receiving either active ventilation or placebo ventilation, meaning a non-functioning ventilation system that just recirculates the air in the room. Ventilation systems are installed in the fall and winter and ventilate the child's bedroom during 9 months. Indoor air quality and asthma control are assessed every 3 months, both at home visits were air quality and allergen levels of house dust mites are studies and at visits to the outpatient clinics with control of asthma parameters and quality of life.

The project involves collaboration between several institutions with an interest in indoor air quality in relation to allergies and asthma and with great expertise in the field.The project was initiated by CISBO (Centre for Indoor Environment and Health in Dwellings), a center consisting of several institutions in Denmark dealing with indoor environment: Department of Public Health at Aarhus University and University of Copenhagen, Danish Building Research Institute and the Technical University of Denmark.

Since asthma is the most common chronic childhood disease in Denmark and since the development of allergies and asthma has high social and personal costs, it is important for both society and the individual family, to find out whether simply improving the indoor air quality by increased ventilation can lead to an improvement in asthma disease control.

Przegląd badań

Status

Zakończony

Warunki

Interwencja / Leczenie

Szczegółowy opis

The aim of the project is to investigate whether increased ventilation is able to improve the indoor air quality and thereby asthma disease control for children with asthma and house dust mite allergy.

Hypotheses:

  1. An increased ventilation in the home will reduce the need for inhaled steroids in children with house dust mite allergy and asthma.
  2. An increased ventilation in the home will improve the quality of life in children with house dust mite allergy and asthma.
  3. An increased ventilation in the home will improve the indoor environment and thus improve asthma disease control in children with house dust mite allergy and asthma.

Materials and methods: The study is a randomized double-blind placebo-controlled intervention study. The intervention is balanced mechanical ventilation in the bedroom of children with asthma and house dust mite allergy during 9-months.

Population: Over 3 year period (2012-2014) 80 families with asthmatic children aged 6-18 years will be included from out-patient clinics at the children's department of the University Hospitals of Aarhus and Odense and regional hospitals in Kolding, Randers and Herning. Families will also be included from private pediatric clinics in Aarhus.

Randomization: After inclusion children are randomized to either active ventilation or placebo ventilation. Randomization is done in blocks of 4 by center.

Intervention: The ventilation units Type DUPLEX 370 EC4.D and DUPLEX 370 are installed during the fall and run continuously for 9 months. The ventilation system is placed outside the house and provides filtered conditioned air to the child's bedroom, through insulated pipes mounted in a window opening. The window opening was built specifically for this purpose in form of a thermo plate replacing the window glass. The unit provides the bedroom with at least 2-3 air changes per hour. The placebo unit (DUPLEX 370) is a completely similar installation which only recirculates the air in the room instead of replacing it. We recommend all parents to wash the duvet and pillow every 3 months.

Data collection:

Data on the children's health is collected every 3 months when the families visit the outpatient clinics. The children are seen by specialist doctors.

At home visits, also every 3 months, data concerning the indoor air quality is collected.

Typ studiów

Interwencyjne

Zapisy (Rzeczywisty)

46

Faza

  • Nie dotyczy

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Lokalizacje studiów

  • Dania
    • Region Hovedstaden
      • Herlev, Region Hovedstaden, Dania, 2730
        • Børneafdelingen Herlev Hospital
    • Region Midt
      • Aarhus, Region Midt, Dania, 8200
        • Childrens Department, Aarhus University Hospital
      • Herning, Region Midt, Dania, 7400
        • Childrens Department, Herning Hospital
      • Randers, Region Midt, Dania, 8930
        • Childrens DEpartment, Randers Hospital
    • Region Nordsjælland
      • Hillerød, Region Nordsjælland, Dania, 3400
        • Childrens Department, Hillerød hospital
    • Region Syddanmark
      • Kolding, Region Syddanmark, Dania, 6000
        • Childrens Department, Kolding Hospital
      • Odense, Region Syddanmark, Dania, 5000
        • H.C. Andersens Children Hospital, Odense University Hospital

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

5 lat do 18 lat (Dziecko, Dorosły)

Akceptuje zdrowych ochotników

Nie

Płeć kwalifikująca się do nauki

Wszystko

Opis

Inclusion Criteria:

  • Doctors diagnosed asthma
  • Need of inhaled steroid titrated down to at least 400 microg/day of Budesonide or equivalent dose of other corticosteroid
  • Skin prick test >/= 3 mm or specific IgE >/= 0,7 kU/l to house dust mites (Derm. Pteronyssinus and/or Derm. Farinae)
  • more than 500 nanog/gr dust of house dust mite allergen in the childs mattress.
  • Living in a one-family house and will allow changes of the house during the intervention period.
  • Capable of giving informed consent.

Exclusion Criteria:

  • Other clinically relevant allergies to tree pollen or animals present in the house.
  • Other diseases or treatments, as for example immunotherapy, which could influence the results.

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

  • Główny cel: Leczenie
  • Przydział: Randomizowane
  • Model interwencyjny: Przydział równoległy
  • Maskowanie: Poczwórny

Broń i interwencje

Grupa uczestników / Arm
Interwencja / Leczenie
Aktywny komparator: Ventilation
Increased ventilation in the childs bedroom to at least 2-3 air changes pr hour.
Urządzenie: Ventilation
The ventilation system is placed outside the house and provides filtered conditioned air to the child's bedroom, through insulated pipes mounted in a window opening. The window opening was built specifically for this purpose in form of a thermo plate replacing the window glass. The unit provides the bedroom with at least 2-3 air changes per hour
Inne nazwy:
  • Ventilation units Type DUPLEX 370 EC4.D
Komparator placebo: Placebo ventilation
Ventilation system that recirculates the air in the childs bedroom
Urządzenie: Placebo Ventilation
The placebo unit (DUPLEX 370) is a completely similar installation to the active ventilation unit, but it only recirculates the air in the room instead of replacing it with fresh conditioned air.
Inne nazwy:
  • Placebo ventilation unit type DUPLEX 370

Co mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Opis środka
Ramy czasowe
Changes in dose of inhaled corticosteroid
Ramy czasowe: Baseline, 3 months, 6 months and 9 months
Measured in micrograms of a specific inhaled corticosteroid
Baseline, 3 months, 6 months and 9 months
Changes in particle concentration in child bedroom
Ramy czasowe: baseline, 3 months, 6 months and 9 months
Measured as particles pr. m3
baseline, 3 months, 6 months and 9 months

Miary wyników drugorzędnych

Miara wyniku
Opis środka
Ramy czasowe
FEV1
Ramy czasowe: Baseline, 3,6 and 9 months
Forced Expiratory Volume after 1 second
Baseline, 3,6 and 9 months
FeNO
Ramy czasowe: Baseline, 3,6 and 9 months
Forced Expiratory Nitric Oxide
Baseline, 3,6 and 9 months
Quality of Life
Ramy czasowe: Baseline, 3,6 and 9 months
Pediatric Asthma Quality of Life Questionaire
Baseline, 3,6 and 9 months
Standard Skin-prick-test and Specific IgE- phadiatop
Ramy czasowe: Baseline and 9 months
Reduction in diameter of skin-prick-test for standard inhalant allergens and reduction in specific IgE for standard inhalant allergens measured in kU/l.
Baseline and 9 months
Asthma Symptoms
Ramy czasowe: During 14 days at baseline, 3, 6 and 9 months
Assessed from a Symptom score scheme
During 14 days at baseline, 3, 6 and 9 months
Peakflow variability
Ramy czasowe: Baseline, 3, 6 and 9 months
Baseline, 3, 6 and 9 months
Ventilation rate
Ramy czasowe: Baseline, 3, 6 and 9 months
Ventilation rate in the childs bedroom and in the Whole house
Baseline, 3, 6 and 9 months
Physical conditions in the child bedroom and whole house
Ramy czasowe: baseline, 3 6 and 9 months
Changes in temperature and humidity
baseline, 3 6 and 9 months
Allergens in child mattress and airborne in child bedroom
Ramy czasowe: baseline, 3, 6 and 9 months
Reduction in allergen levels.
baseline, 3, 6 and 9 months

Współpracownicy i badacze

Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.

Sponsor

University of Aarhus

Śledczy

  • Dyrektor Studium: Torben Sigsgaard, Professor, Aarhus University, Department of Public Health, Section for Environment, Occupation and Health
  • Główny śledczy: Nina V Hogaard, MD, Aarhus University, Dept. of Public Health, Section for Environment, Occupation and Health

Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów

1 sierpnia 2012

Zakończenie podstawowe (Rzeczywisty)

1 lutego 2016

Ukończenie studiów (Rzeczywisty)

1 lutego 2016

Daty rejestracji na studia

Pierwszy przesłany

19 lutego 2014

Pierwszy przesłany, który spełnia kryteria kontroli jakości

19 lutego 2014

Pierwszy wysłany (Oszacować)

21 lutego 2014

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Oszacować)

12 maja 2016

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

11 maja 2016

Ostatnia weryfikacja

1 maja 2016

Więcej informacji

Terminy związane z tym badaniem

Słowa kluczowe

Dodatkowe istotne warunki MeSH

Inne numery identyfikacyjne badania

  • AstmaVen - 1101

Te informacje zostały pobrane bezpośrednio ze strony internetowej clinicaltrials.gov bez żadnych zmian. Jeśli chcesz zmienić, usunąć lub zaktualizować dane swojego badania, skontaktuj się z register@clinicaltrials.gov. Gdy tylko zmiana zostanie wprowadzona na stronie clinicaltrials.gov, zostanie ona automatycznie zaktualizowana również na naszej stronie internetowej .

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