Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 18 and up

Using Nadroparin to Improve Outcomes in Patients with Aneurysmal Subarachnoid Hemorrhage

Official title: Improving Outcome in Subarachnoid Hemorrhage wIth Nadroparine

Run by Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) · NCT04507178 · Data updated 2026-11-12

This study is testing if giving higher doses of Nadroparin can help patients who have had an aneurysmal subarachnoid hemorrhage live longer and have better recovery outcomes compared to standard doses.

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment100 (estimated)
SponsorAcademisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)
Academic / other
Locations1 site (Amsterdam)
StatusRecruiting
StartedFebruary 2, 2022
Main results expectedAugust 1, 2026
Study endsApril 1, 2027
Registry record updatedJanuary 29, 2025
Trial IDNCT04507178 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults diagnosed with aSAH who have undergone coiling of the aneurysm within 72 hours of the initial hemorrhage.

Probably not a fit

Patients with contraindications for low-molecular weight heparin or those who have undergone stent-assisted coiling may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial investigates the effects of therapeutic low-molecular weight heparin (Nadroparin) on patients who have experienced an aneurysmal subarachnoid hemorrhage (aSAH). The study aims to determine if higher doses of Nadroparin can reduce the 30-day mortality rate compared to standard prophylactic doses. It also seeks to explore differences in clinical outcomes related to delayed cerebral ischemia (DCI) in these patients. Participants will be monitored for their response to treatment following the coiling of the causative aneurysm.

Why it matters

Potential benefit: If successful, this treatment could significantly lower mortality rates and improve recovery outcomes for patients with aSAH.

How similar studies have gone: Previous studies have indicated potential benefits of therapeutic LMWH in similar patient populations, suggesting this approach may be promising.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* SAH confirmed by CT or lumbar puncture with the causative aneurysm confirmed by CT-A and/or digital subtraction angiography
* Coiling of the causative aneurysm within 72 hours of initial SAH
* Informed consent within 24 hours after coiling

Exclusion Criteria:

Stent-assisted coiling

* Use of anticoagulant medication post-coiling for other reasons
* Contra-indications for LMWH:

  * Previous history of history of heparin-induced thrombocytopenia
  * (Suspicion of) active arterial or venous bleeding
  * Previous history of hemorrhagic diathesis due to coagulation disorders (with the ex-ception of disseminated intravascular coagulation)
  * Severe hypertension: uncontrolled hypertension with a mean arterial pressure \>135mmHg
  * Previous history of hypertensive or diabetic retinopathy
  * Previous history of active infectious endocarditis
  * Severe renal impairment (creatinine clearance \<30 mL / min)
* No proficiency of Dutch or English language

Where it's running

  • Amsterdam University Medical Centers
    Amsterdam, Netherlands
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 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.