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Can kids regain full fitness after a blood clot? new study investigates

NCT ID NCT04583878

Knowledge-focused Sponsor: University of Texas Southwestern Medical Center Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at why some children and teens feel short of breath or have trouble exercising after their first blood clot in the leg (deep vein thrombosis) or lung (pulmonary embolism). Researchers will measure exercise capacity and breathing using special tests. The goal is to better understand these long-term effects, not to test a new treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

115 people

The number who actually took part.

Started

Dec 2020

Expected to finish

Mar 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Study population will include children (defined as persons who have not attained the legal age for consent to treatments or procedures involved in the research, under the applicable law of the jurisdiction in which the research will be conducted), and patients (defined as individuals in a clinical setting with whom there is a treatment relationship). Participants must meet the eligibility criteria in order to participate in this trial.

Ages

8 to 21 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Ages 8 to ≤ 21 years * Participant must be able to speak and understand English * Be willing to participate and able to comply with the study protocol * For participants with PE: Children with acute, radiologically confirmed pulmonary embolism (PE) with our without DVT * For control group: Cohort 1: Children who are prescribed physical activity restrictions for 2 up to 12 weeks following any minor outpatient surgery or, minor injury (surgery or injury is referred to as "diagnosis" hereafter) Cohort 2: Children who are not prescribed physical activity restrictions and are otherwise considered to be healthy. Exclusion Criteria: * Congenital heart disease with abnormal pulmonary circulation or with in-situ pulmonary artery thrombosis * Chronic kidney disease * Chronic inflammatory or an autoimmune disorder (such as systemic lupus erythematosus, juvenile rheumatoid disorder, inflammatory bowel disease, and sickle cell disease) * A metabolic or endocrinological disorder such as diabetes mellitus or thyroid disorder * History of or active cancer * Pregnant * Musculoskeletal limitations to exercise expected to be present uptil 4 months post-diagnosis * Weight ≥ 300 lbs * Contraindications to magnetic resonance imaging * Frequent severe exacerbations of asthma defined by two or more bursts of systemic glucocorticoids (more than three days each) in the previous year or at least one hospitalization, intensive care unit stay or mechanical ventilation in the previous year. Patients should also be excluded if there are daily symptoms of asthma requiring daily use of short-acting bronchodilators such as albuterol or levalbuterol administration. The use of controller medications such as daily inhaled corticosteroids for mild persistent asthma is not exclusionary. * Has any other medical condition, which in the opinion of the investigator may potentially compromise the safety or compliance of the patient or may preclude the patient's successful completion of the clinical study Additional exclusion criteria for participants with PE: * Prior history of DVT or PE (upper extremity, cerebral sinus venous thrombosis and abdominal thromboses encountered as a neonate are not exclusion criteria) * Lack of anticoagulant treatment for the acute VTE due to contraindications

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Conditions

The condition(s) this trial relates to.

pulmonary embolism venous thromboembolism Venous Thrombosis

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Deep venous thrombosis Pulmonary embolism

Contacts and locations

Locations

  • Ann & Robert H. Lurie Children's Hospital of Chicago

    Chicago, Illinois, 60611, United States

  • Arkansas Childrens Research Institute (ACRI)

    Little Rock, Arkansas, 72202, United States

  • Boston Children's Hospital

    Boston, Massachusetts, 02115, United States

  • Central Michigan University

    Mount Pleasant, Michigan, 48859, United States

  • Children's Hospital of Philadelphia

    Philadelphia, Pennsylvania, 19146, United States

  • Childrens Mercy Hospital

    Kansas City, Missouri, 64108, United States

  • Cincinnati Childrens Hospital

    Cincinnati, Ohio, 45229, United States

  • Cook Childrens Medical Center

    Fort Worth, Texas, 76104, United States

  • Emory University / Children's Heathcare Atlanta

    Atlanta, Georgia, 30329, United States

  • Johns Hopkins All Childrens Hospital

    St. Petersburg, Florida, 33701, United States

  • Nationwide Children's Hospital

    Columbus, Ohio, 43205, United States

  • Texas Children's Hospital

    Houston, Texas, 77030, United States

  • UT Southwestern Medical Center / Children's Medical Center

    Dallas, Texas, 75235, United States

  • University of Oklahoma Health Sciences Center

    Oklahoma City, Oklahoma, 73104, United States

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