Evidence map›Paper›PMID 42353962›Full record

ArticleChildren (Basel, Switzerland)2026

Assessment of Anti-Factor Xa Levels in Children Receiving Low-Molecular-Weight Heparin for Treatment and Prophylaxis.

Margarita Panova, Maria Spasova, Snezhana Stoencheva, Teodora Dimcheva, Iglika Sotkova-Ivanova, Pamela Boykova

Abstract read
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Article in Children (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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2 · The registry

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Margarita PanovaDepartment of Pediatrics "Prof. Dr. Ivan Andreev", Medical University Plovdiv, 4002 Plovdiv, Bulgaria.
Maria SpasovaDepartment of Pediatrics "Prof. Dr. Ivan Andreev", Medical University Plovdiv, 4002 Plovdiv, Bulgaria.
Snezhana StoenchevaDepartment of Clinical Laboratory, Medical University Plovdiv, 4002 Plovdiv, Bulgaria.
Teodora DimchevaDepartment of Medical Informatics, Biostatistics and E-Learning, Medical University Plovdiv, 4002 Plovdiv, Bulgaria.ORCID 0000-0003-1508-6647
Iglika Sotkova-IvanovaDepartment of Medical Genetics, Medical University Plovdiv, 4002 Plovdiv, Bulgaria.
Pamela BoykovaDepartment of Pediatrics "Prof. Dr. Ivan Andreev", Medical University Plovdiv, 4002 Plovdiv, Bulgaria.

Funding

Medical University Plovdiv Project No. HO-21/2023
6 · The paper itself

Abstract

backgroundThe use of low-molecular-weight heparins (LMWH) for the treatment and prevention of thromboembolic diseases in pediatric patients is increasing, although optimal dosing and monitoring strategies remain insufficiently defined.

methodsThis study was conducted at the Clinic of Pediatrics, University Hospital "St. George", and included 26 hospitalized patients aged 0-18 years with confirmed arterial or venous thrombosis receiving treatment or prophylaxis with enoxaparin. A total of 42 samples were analyzed. Anti-factor Xa activity was measured using an LMWH-calibrated anti-FXa assay (Innovance Heparin, Siemens Healthineers) on a Sysmex CS-2500 analyzer. Therapeutic and prophylactic dosing followed CHEST 2012 guidelines. The study evaluated age- and weight-based dosing, the number of dose adjustments required to achieve target Anti-Xa levels, and the relationship between Anti-Xa levels and anticoagulant response.

resultsThe mean baseline Anti-Xa level achieved with the initial weight-based dose (1.0 mg/kg/12 h) was significantly lower in children aged 1-2 years compared with older age groups. Older children, as well as patients with oncological and nephrological diseases, achieved higher anticoagulant levels with standard prophylactic dosing. Age under 1 year, oncological disease, and baseline Anti-Xa level < 0.3 IU/mL were identified as independent predictors of the need for more frequent dose adjustments to achieve a therapeutic response.

conclusionsMonitoring of Anti-factor Xa levels is essential in pediatric patients receiving LMWH for both treatment and prophylaxis. Standard dosing regimens may be insufficient in younger children and specific clinical subgroups, supporting the need for individualized dosing strategies.

Indexed as

anticoagulationanti-factor Xaenoxaparinlow-molecular-weight heparinmonitoringpediatric thrombosis

Identifiers

PMID42353962
PMCPMC13298179

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