Evaluation of Pulmonary Perfusion Heterogeneity and Compliance in Patients With Pulmonary Hypertension Using Positron Emission Tomography Imaging
Evaluation of Pulmonary Perfusion Heterogeneity and Compliance in Patients With Pulmonary Arterial Hypertension Using Functional Positron Emission Tomography Imaging
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
Massachusetts
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Boston, Massachusetts, Forenede Stater, 02114
- Massachusetts General Hospital
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
General
- A signed and dated written informed consent is obtained from the subject.
- The subject is capable of giving informed consent, which includes compliance with the requirements and restrictions listed in the consent form.
- Available to complete the study.
- Able to lie flat and able to perform a 30 second breath hold.
Patients with Pulmonary Hypertension
- Subject is male or female aged = or > 18 years of age and < or = 70 years.
- Subject is diagnosed with pulmonary arterial hypertension (WHO Group I, by right heart catheterization, mean PA pressure > 25 and PCWP < 15) or exercise-induced pulmonary hypertension (by right heart catheterization + Level III cardiopulmonary exercise testing, mean PAP > 30 and PCWP < 20 during exercise, but normal at rest), with the most recent of above diagnostic tests taking place within 12 months of study entry.
- If patient has been on PAH-specific therapy, the therapy (agent and dose) has been unchanged for at least 3 months.
Exclusion Criteria:
General
- FEV1 and/or TLC < 70% predicted
- PCWP > 15 mm Hg
- Inability to perform the study (by primary MD or investigator assessment)
- Subjects who have a past or present disease, which as judged by the Investigators may affect the outcome of this study
- The subject has suspected history of drugs or alcohol abuse within the six months prior to the screening visit.
- The subject has a positive pregnancy test.
- The subject is unable to perform the respiratory manoeuvres necessary for the exam.
- The subject has been exposed to a radiation dose over the past year that, when added to the radiation dose expected in this study, would exceed permissible yearly exposure as determined by the MGH radiation safety committee.
Subjects with Pulmonary Hypertension
- Subject with clinical instability in the judgment of the investigator, or hospitalization for progression of pulmonary hypertension or right heart failure in the three months prior to the study.
- Subjects in whom PAH therapy has been escalated (additional agent started) within 3 months of enrolment.
- Subject with diagnosis of active tuberculosis, lung cancer, clinically overt bronchiectasis, allergic rhinitis, asthma, or COPD.
- Subject that had a respiratory tract infection in the 4 weeks prior to the screening visit and throughout the duration of the study.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Andet
- Tildeling: Ikke-randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Eksperimentel: pulmonary hypertension
Patients with Group I pulmonary arterial hypertension and exercise-induced pulmonary hypertension to undergo CT imaging, functional PET imaging
|
Physiology study using CT and functional PET imaging with 13NN and 11CO as radiotracers; images obtained before and after administration of inhaled nitric oxide and balance 80% oxygen as pulmonary vasodilators
|
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Aktiv komparator: healthy controls
healthy adults to serve as controls and to undergo the same study procedures: CT imaging, functional PET imaging
|
Physiology study using CT and functional PET imaging with 13NN and 11CO as radiotracers; images obtained before and after administration of inhaled nitric oxide and balance 80% oxygen as pulmonary vasodilators
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Coefficient of variation of perfusion
Tidsramme: One imaging visit lasting up to 3 hours
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Images will be generated with positron emission tomography that will be used to calculate the degreee to which the blood flow in the lung is patchy rather than smooth.
The statistical measure of this is called the coefficient of variation.
|
One imaging visit lasting up to 3 hours
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Vascular compliance
Tidsramme: One imaging visit lasting up to 3 hours
|
Positron emission tomography images will be obtained during different phases of the heart beat that will show how the blood vessels in the lung stretch with ejection of blood from the heart.
The change in volume of the blood vessels is called vascular compliance and is a measure of blood vessel stiffness.
|
One imaging visit lasting up to 3 hours
|
|
Perfusion gradient
Tidsramme: One imaging visit lasting up to 3 hours
|
From the images of blood flow in the lung, the change in mean blood flow from the bottom of the lung to the top will be calculated.
Normally, there is more blood flow at the bottom of the lung compared to the top, but this can be changed with lung disease.
|
One imaging visit lasting up to 3 hours
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: R. Scott Harris, M.D., Massachusetts General Hospital
Datoer for undersøgelser
Studer store datoer
Studiestart
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- 2011-P-001880/1
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