This study is currently recruiting participants.
Number
000844-H
Sponsoring Institute
National Heart, Lung and Blood Institute (NHLBI)
Recruitment Detail
Type: Participants currently recruited/enrolled Gender: Male & Female Min Age: 18 Years Max Age: 100 Years
Referral Letter Required
No
Population Exclusion(s)
Children
Keywords
Hemodynamic; Six-Minute Walk Test
Recruitment Keyword(s)
None
Condition(s)
SCD
Investigational Drug(s)
Investigational Device(s)
Intervention(s)
Diagnostic Test: Non-Invasive Infrared Spectroscopy
Supporting Site
National Heart, Lung, and Blood Institute
Objective:
To test NIRS as a tool for measuring oxygen levels, blood flow, and the makeup of skin and muscle in patients with SCD.
Eligibility:
People aged 18 years and older with SCD. Healthy volunteers are also needed as a comparison for the changes in SCD patients.
Design:
Participants will be screened. They will have a physical exam, and 1 teaspoon of blood will be drawn.
Participants will have NIRS testing on their second visit. Probes will be placed on their skin. A blood pressure cuff will be placed on their arm. The cuff will be filled with air for up to 5 minutes and then released. Participants may be asked to breathe at a certain rate or hold their breath during these measurements.
At this visit, participants will also have an ultrasound exam to get images of their heart. They will be monitored while they walk for 6 minutes. They will have 1 tablespoon of blood drawn. Their height, weight, and vital signs will be measured.
Participants may be asked to return for up to 4 additional visits for NIRS testing within 120 days, but this is optional. The visits must be at least 3 days apart. Each visit will last up to an hour.
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INCLUSION CRITERIA: Sickle Cell Disease -Individuals with confirmed sickle cell disease (HbSS and S beta 0 genotypes) -18 years of age and older -Willingness and capacity to provide informed consent -Individuals must be on stable does of Hydroxyurea for 90 days prior to baseline visit Ethnically matched controls -Individuals with HbAA genotype -18 years of age and older -Willingness and capacity to provide informed consent EXCLUSION CRITERIA: Sickle Cell Disease -Pain crisis requiring parenteral treatment within 4 weeks of screening/enrollment -Blood transfusion within 60 days or exchange transfusion within 90 days of screening/enrollment -Use of Oxbryta (voxelotor), Adakveo (crizanlizumab), and/or Endari (L-glutamine) within the 12 weeks prior to signing consent -Women who are currently pregnant -Presence of an arterial-venous shunt, recent axillary node dissection, or any deformity or surgical history that interferes with proper access for brachial cuff occlusion procedure of the extremities -Mobility difficulties causing the inability to complete 6-minute walk test Ethnically matched controls -Women who are currently pregnant -Presence of an arterial-venous shunt, recent axillary node dissection, or any deformity or surgical history that interferes with proper access for brachial cuff occlusion procedure of the extremities -Mobility difficulties causing the inability to complete 6-minute walk test -Blood transfusion within 60 days or exchange transfusion within 90 days of screening/enrollment
Sickle Cell Disease
-Individuals with confirmed sickle cell disease (HbSS and S beta 0 genotypes)
-18 years of age and older
-Willingness and capacity to provide informed consent
-Individuals must be on stable does of Hydroxyurea for 90 days prior to baseline visit
Ethnically matched controls
-Individuals with HbAA genotype
EXCLUSION CRITERIA:
-Pain crisis requiring parenteral treatment within 4 weeks of screening/enrollment
-Blood transfusion within 60 days or exchange transfusion within 90 days of screening/enrollment
-Use of Oxbryta (voxelotor), Adakveo (crizanlizumab), and/or Endari (L-glutamine) within the 12 weeks prior to signing consent
-Women who are currently pregnant
-Presence of an arterial-venous shunt, recent axillary node dissection, or any deformity or surgical history that interferes with proper access for brachial cuff occlusion procedure of the extremities
-Mobility difficulties causing the inability to complete 6-minute walk test
Principal Investigator
Referral Contact
For more information: