Clinical trials
Blood Circulation clinical trials
Below are recruiting blood circulation clinical trials, each written for real people, not researchers. We’re tracking 63 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06629090RecruitingPhase 2
Brain blood vessel responses to blood flow changes: younger adults
This study looks at how the brain's blood vessels respond to changes in blood flow in healthy younger adults. It helps researchers understand normal brain aging.
Madison, WisconsinAges 20–40 - NCT07745530Recruiting
How platelets affect HIV reservoirs in the blood
This study looks at how platelets (small blood cells that help with clotting) might influence the hidden HIV that remains in your body even when your viral load is undetectable. The goal is to understand why some people's immune systems don't fully recover despite effective HIV treatment.
TourcoingAges 18 years+ - NCT06784440Recruiting
Finding noninvasive markers of graft injury after heart transplant
This study looks for noninvasive markers (like blood or urine tests) that can show if a heart transplant is being injured. It aims to make monitoring safer and easier for children and adults with congenital heart disease who have had a transplant.
BolognaAges Up to 44 years - NCT04966663RecruitingPhase 2
Using blood DNA tests to guide lung cancer treatment
This study uses a blood test called ctDNA to look for leftover lung cancer after surgery. Based on that result, the trial will help decide which treatment approach is best for you and may catch cancer returning earlier.
Toronto, OntarioAges 18 years+ - NCT06610851Recruiting
Monitoring low-grade brain tumors with a blood test
This study is looking at whether a simple blood test that checks for tiny molecules (called miRNAs) can help monitor people with slow-growing brain tumors. If you had surgery for a grade 2 or 3 glioma at Caen University Hospital and are still being followed there, this study might be for you.
CaenAges 18 years+ - NCT05227534Recruiting
Test for early cancer signals in people without symptoms
This trial checks whether a blood test can detect early signs of multiple cancers in people who feel well. It may help find cancer earlier, when treatment is more likely to work.
Chengdu, SichuanAges 40–75 - NCT06048835Recruiting
Studying tumor cells in breast cancer patients
This trial looks at tumor cells in the blood of women with breast cancer to understand them better. It may help doctors learn more about how the disease spreads.
Pavia, LombardyAges 18–90 - NCT07685405Recruiting
Biomarker study for Ewing sarcoma
This study looks for special markers called 'biomarkers' in the blood of people with Ewing sarcoma and compares them to people without cancer. It aims to find new ways to understand and potentially monitor this tumor using tiny particles in the blood.
Bologna, BOAges Any age - NCT06244355Recruiting
Study of immune cells in lung cancer and COPD
This study examines how certain white blood cells behave in people with lung cancer or COPD. It aims to better understand the immune response, which could help develop new treatments.
Paris, Île-de-France RegionAges 18 years+ - NCT04814407Recruiting
Test blood and other markers to detect early lung cancer
This study looks for new “epigenetic” signals in blood (signals about how genes are turned on/off) to help detect lung cancer early. You might be able to join if you are being evaluated for possible lung cancer or have small, unclear spots on a lung CT scan.
TaipeiAges 20 years+ - NCT07084558Recruiting
Testing treatment guided by tumor DNA for hormone positive breast cancer
This trial tests whether using a blood test (circulating tumor DNA) can help guide chemo and hormone therapy for early-stage, hormone receptor positive and HER2 negative breast cancer. The goal is to tailor treatment to your tumor's response, potentially reducing unnecessary side effects.
Vienna, AustriaAges 18–100 - NCT06809673Enrolling by invitation
Blood markers in head and neck cancer surgery
This study looks at whether certain blood tests can help predict how head and neck cancer will respond to treatment. If you are planning surgery for squamous cell cancer of the throat, voice box, or mouth, this trial may offer more information about your outlook.
GenoaAges 18 years+ - NCT05505669Recruiting
Blood test study to track markers in diabetes
This study measures “circulating biomarkers” (blood-based signals) in people with type 1 or type 2 diabetes, and in some people without diabetes who test positive for certain diabetes antibodies. The goal is to understand what these blood signals can tell us about diabetes development and progression.
Duarte, CaliforniaAges Any age - NCT05082961Recruiting
Blood immune markers and brain radiation after head/neck surgery
This study looks at immune system signals in your blood during and after postoperative radiation therapy for certain head and neck cancers involving the brain or skull base. Researchers want to see whether these “immune markers” relate to treatment response or side effects.
CaenAges 18 years+ - NCT06071286Recruiting
Study tracking DNA from tumors in advanced ovarian cancer
This study looks for cancer DNA in your blood to understand advanced ovarian cancer better. It helps doctors see how the disease changes over time and may improve future treatments.
RomaAges 18–80 - NCT06863805Recruiting
Blood markers in advanced thyroid cancer
This study is looking at how certain substances in the blood (called biomarkers) can help doctors understand and treat advanced thyroid cancer. It is for people who are about to start their first systemic therapy (medication that works throughout the body) for advanced thyroid cancer, and who have already had a genetic test on their tumor.
BolognaAges 18 years+ - NCT07663994Recruiting
Blood test validation study for healthy volunteers
This study tests a new method for analyzing DNA in blood to make sure it works correctly. It needs healthy volunteers from the hospital staff to donate a blood sample.
ToulouseAges 18 years+ - NCT03825458Recruiting
Study tracking hepatitis B viral RNA in blood
This study builds a group of people to measure small hepatitis B “viral RNA” signals in the blood. The goal is to see if these measurements could help researchers find a functional cure and better understand who may respond over time.
LyonAges 18 years+ - NCT06606366Recruiting
Genetic tumor testing using a blood test to guide treatment
This study uses a simple blood test to look at the genetic makeup of your tumor. The results may help your doctors choose the best treatment for you. You will need to provide a tumor sample or have a biopsy.
NiceAges 18 years+ - NCT03818412Recruiting
Liquid biopsy for soft tissue sarcoma
This study checks if a blood test can detect DNA from soft tissue sarcomas. The goal is to see if circulating tumor DNA can help doctors monitor the disease and plan treatment.
Toronto, OntarioAges 18 years+ - NCT06754709Recruiting
Protein Changes in Children Having Heart Surgery
This study looks at a specific protein change in blood and heart tissue of children having heart surgery with a heart-lung machine. The goal is to understand how this protein might affect recovery.
NantesAges Up to 17 years - NCT06989814Recruiting
Liquid biopsy test for Lynch syndrome cancer patients
This trial tests a simple blood test to measure tumor DNA in people with Lynch syndrome who have been newly diagnosed with cancer but haven't started treatment yet. It aims to see if this test can help monitor the cancer.
Leiden, South HollandAges 18 years+ - NCT07401316Recruiting
Tracking germ cell tumors with a blood test for cancer DNA
This trial looks for signs of cancer DNA in your blood (circulating tumor DNA) to see if it can help track germ cell tumors. It may help doctors find out if your cancer is coming back earlier.
Indianapolis, IndianaAges 18 years+ - NCT04065321Recruiting
Blood test for tumor cells in certain early breast cancers
This trial looks at a blood test that may detect “circulating tumor cells” (cancer cells that can travel in the bloodstream) in people with a specific type of breast cancer. It may help doctors better track the disease and guide treatment for people whose tumors have certain hormone and growth-factor features.
Shenyang, LiaoningAges 18–60
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Common questions
- Are there clinical trials for blood circulation?
- Yes. Clin2 currently lists 63 recruiting blood circulation studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a blood circulation trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a blood circulation trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.