Pharmacokinetic Profiles of Subcutaneous Enoxaparin for Thromboprophylaxis in Critically Ill Patients With Renal Failure Treated or Not With Continuous Veno-veinous Hemofiltration.
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Anti-Xa profiles after the subcutaneous administration of a prophylactic dose of enoxaparin.
- Who it may be relevant to
- Registry conditions: Thromboprophylaxis, Critical Illness, Intensive Care (ICU). Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Center list to be confirmed — check the primary protocol.
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
Thromboprophylaxis is recommended for critically ill patients without contraindications and is usually achieved by the subcutaneous daily administration of a low dose of low molecular weight heparin (LMWH). The efficacy of this measure can be assessed by measuring the anticoagulation level obtained in the blood by dosing the anti-Xa activity. However, multiple studies have shown that anti-Xa activities in critically ill patients in the intensive care unit (ICU) are much lower, and below the desired range, than their ward counterparts. LMWH elimination depends on kidney function and reduced dosing is recommended for patients with renal failure, treated or not with renal replacement therapy (continuous veno-venous hemofiltration (CVVH)). However, some scarce data suggest that even critically ill patients with renal failure treated with reduced or even with standard doses of LMWH, also have lower anti-Xa activities (below the desired range). If confirmed, this finding may suggest that reduced or even standard dosing of LMWH for thromboprophylaxis in critically ill patients with renal failure should be replaced by another dosing regimen or another route of administration. Therefore, this study aims to better characterize the pharmacokinetic profiles of LMWH after administration of a prophylactic dose of enoxaparin daily in patients with renal failure treated or not with CVVH, and to compare them to patients with no renal failure.
Interventions
- Diagnostic test Anti-Xa profiles after the subcutaneous administration of a prophylactic dose of enoxaparin
Monitoring of the antifactor Xa activity will be performed immediately before (H0), 4(H4), 8(H8), 12 (H12), and 24 (H24) hours after up to 3 doses of LMWH administration.
Primary outcome measures
- mean peak anti-Xa activity [Time frame: 4 hours after the subcutaneous administration of a prophylactic dose of enoxaparin]
Secondary outcome measures (2)
- Mean area under the curve (AUC) (0-24 hours) of anti-Xa activity [Time frame: 0-24 hours after the subcutaneous administration of a prophylactic dose of enoxaparin]
- Trough value of anti-Xa activity [Time frame: Trough value of anti-Xa activity 24 hours after the injection of a prophylactic dose of enoxaparin.]
Eligibility criteria
Inclusion criteria
- Age > 18 year old
- Hospitalized in the ICU.
- Equiped with an arterial line.
- Indication for thromboprophylaxis with a daily prophylactic dose of enoxaparin.
- Additionnally:
- For cohort 1: severe renal failure (KDIGO stage ≥2) without CVVH AND SOFA score ≥4.
- For cohort 2: severe renal failure (KDIGO stage ≥2) with CVVH AND sequential organ failure assessment (SOFA) score ≥4.
- For cohort 3: no renal failure (creatinine clearance > 60 ml/min)
Exclusion criteria
- Platelet count < 50 000/μl.
- CHILD PUGH stage C cirrhosis.
- Known coagulation disorder.
- Patient treated in the last 3 days with direct oral anticoagulants.
- Patient treated in the last 24h with LMWH before enrollment.
- High bleeding risk with contra indication for standard dose of LMWH prophylaxis, as per investigator judgment
- Indication for therapeutic anticoagulation (including CVVH with systemic heparin anticoagulation).
- Body weight < 50 kg or > 120 kg.
- Evidence of recovery of renal function before enrollment, based on investigator judgement.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- N/A
- Model
- Single group
- Masking
- Open label
- Primary purpose
- Prevention
Study locations
Center list to be confirmed — check the primary protocol.
Identifiers
NCT: NCT07384598 · AKI-ENOXA