ICU blood test may predict deadly clots
NCT ID NCT06357403
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This observational study will follow 1300 critically ill adults in intensive care to see if a blood test called anti-factor Xa activity can predict dangerous blood clots (deep vein thrombosis or pulmonary embolism). Researchers will also track bleeding risks, quality of life, and survival. The goal is to better understand how to prevent clots in very sick patients.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 1,300 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2024
- Expected to finish
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Aug 2027
An estimate. End dates often move.
- Lead sponsor
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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
Adult patients admitted to an surgical or medical intensive care unit who do not receive therapeutic anticoagulation
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Age over 18 years at the time of intensive care unit admission * Admission to a participating intensive care unit within the last 24 hours * Expected discharge is later than 48 hours after enrolment Exclusion Criteria: * Therapeutic anticoagulation, defined as enoxaparin dose of at least 100 IE/kg when given twice daily or of at least 150 IE/kg when given once daily * Extracorporeal membrane oxygenation in place or planned within 48 hours of study enrolment * Planned regular administration of vitamin K antagonists, unfractionated heparin, low molecular weight heparin other than enoxaparin, thrombin inhibitors or factor X inhibitors within the observation period * Estimated life expectancy below 48 hours or comfort terminal care order in place * Previously diagnosed heparin-induced thrombocytopenia * Pre-operative admission for elective surgery * Previous enrolment in the study
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
3 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Department of Anaesthesia, Intensive Care Medicine and Pain Medicine, Medical University of Vienna
RECRUITINGVienna, 1090, Austria
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Department of Internal Medicine, Medical University of Graz
RECRUITINGGraz, Styria, 8063, Austria
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Division of Intensive Care and Emergency Medicine, Department of Internal Medicine, Medical University Innsbruck
RECRUITINGInnsbruck, Tyrol, 6020, Austria
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Other studies related to the condition(s) this trial covers.
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