Microvascular and Cardiac Dysfunction in Paroxysmal Nocturnal Hemoglobinuria and Sickle Cell Disease

October 27, 2014 updated by: Jonathan R. Lindner, MD, Oregon Health and Science University
The purpose of this study is to examine how abnormal blood flow in the small vessels (microvessels) of the heart, muscle and kidney in paroxysmal nocturnal hemoglobinuria (PNH) or sickle cell disease leads to poor functioning of the heart and kidney. To test this question, the investigators will perform imaging tests (contrast ultrasound perfusion imaging) to look at the flow and function of these microvessels and compare this information to heart and kidney function. To further look at this question, patients who have PNH will be studied before and after starting a new drug (Soliris) that decreases damage to blood cells. In patients with sickle cell disease, patients will be studied at baseline (not during a pain crisis) and also during a pain crisis if one develops.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

6

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Oregon
      • Portland, Oregon, United States, 97239
        • Oregon Health & Science University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

19 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Patients with SCD or PNH who are seen in the OHSU Hematology clinic and are asked to participate

Description

Inclusion Criteria:

  • Established diagnosis of PNH or SCD Age > 18 years old

Exclusion Criteria:

  • Pregnant or lactating women Presence of significant right to left shunting Allergy to ultrasound contrast agent Reactive airways disease Significant peripheral or coronary artery disease

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Control
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Control
Age matched healthy subjects
Other: Imaging
Contrast ultrasound perfusion imaging and complete echocardiography
Sickle Cell Patients
Patients with established SCD
Other: Imaging
Contrast ultrasound perfusion imaging and complete echocardiography
Paroxysmal Nocturnal Hemoglobinuria patients
Patients with PNH
Other: Imaging
Contrast ultrasound perfusion imaging and complete echocardiography

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Microvascular perfusion
Time Frame: 1 hour
  1. Myocardial microvascular blood flow (MBF) and capillary blood velocity (CBV) on study day.
  2. Renal MBF on study day
  3. Skeletal muscle MBF and CBV on study day
  4. Myocardial MBF and CBV during hyperemia
  5. Skeletal muscle CBV during hyperemia
1 hour

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Oregon Health and Science University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

February 1, 2011

Primary Completion (Actual)

October 1, 2014

Study Completion (Actual)

October 1, 2014

Study Registration Dates

First Submitted

February 11, 2011

First Submitted That Met QC Criteria

February 11, 2011

First Posted (Estimate)

February 14, 2011

Study Record Updates

Last Update Posted (Estimate)

October 28, 2014

Last Update Submitted That Met QC Criteria

October 27, 2014

Last Verified

October 1, 2014

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRB00006948

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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