Effect of Vasopressors on Blood Thinning in Critically Ill Patients

Anti-Xa Activity in Patients Receiving Different Vasopressors.

Observational Medical University of Gdansk · NCT06055907

This study is testing how different blood pressure medications affect blood thinning in critically ill patients who are getting a specific type of blood thinner to prevent clots.

Quick facts

Study typeObservational
Enrollment50 (estimated)
Ages18 Years to 85 Years
SexAll
SponsorMedical University of Gdansk Academic / other
Locations1 site (Gdańsk)
Trial IDNCT06055907 on ClinicalTrials.gov

What this trial studies

This observational study investigates the impact of vasopressors, specifically norepinephrine with and without argipressin, on anti-Xa activity in critically ill patients receiving subcutaneous dalteparin for thrombosis prevention. The study aims to determine if there are differences in the effectiveness of anticoagulation between these two treatment groups. By measuring serum anti-Xa activity, the research seeks to provide insights into optimizing antithrombotic therapy in patients with circulatory failure. The findings could help tailor anticoagulation strategies in critical care settings.

Who should consider this trial

Good fit: Ideal candidates include critically ill patients experiencing circulatory failure who are receiving norepinephrine alone or in combination with argipressin and are on dalteparin for VTE prevention.

Not a fit: Patients with contraindications for dalteparin, severe coagulopathy, or those who are pregnant will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance the safety and effectiveness of anticoagulation therapy in critically ill patients.

How similar studies have performed: While the specific approach of this study is novel, similar studies have explored the effects of vasopressors on anticoagulation, indicating potential for meaningful insights.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Circulatory failure
* Supported by continuous infusion of noradrenaline or noradrenaline and argipressin
* Receiving subcutaneous dalteparin for the prevention of venous thromboembolism.

Exclusion Criteria:

* Contraindications for dalteparin
* Severe coagulopathy
* Acute or subacute bacterial endocarditis
* Pregnant women
* BMI (body mass index) \> 30kg/m2
* Chronic kidney disease with eGFR (estimated glomerular filtration rate) \< 30 ml/min/1.73 m2
* Renal replacement therapy
* The patient died within 52 hours of starting VTE (venous thromboembolism) prophylaxis with dalteparin

Where this trial is running

Gdańsk

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Critical IllnessThrombosis
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.