Hemodynamics, fluids & transfusion

A retrospective Cohort study on the effect of the LOw-molecular weighT heparin (LMWH) nadroparin dose on anti-XA levels in a mixed medical-surgical ICU population: CLOT-Xa

J Crit CarePublished Retrospective cohort study

Authors' conclusion

We found a clear dose-response relationship between nadroparin dose and anti-Xa levels.

Study context

Population
Critically ill adults in a mixed medical-surgical ICU receiving ≥3 SC injections of nadroparin1,520 anti-Xa measurements
Participants
327 adults
Exposure
Nadroparin dose categories vs anti-Xa level
Outcome
Dose-response relationship between nadroparin dose and anti-Xa activity
Methodological detailsmixed-effects logistic regression
  • Mixed-effects logistic regression

Main finding

As reported in the abstract

Median anti-Xa level by nadroparin dose

0-37 IU/kg/day

<0.1

median · IU/mL

>85 IU/kg/day

0.6

median · IU/mL

P < 0.01

Observational data: associations, not effects.

Further findings

Anti-Xa in desired range — 38-85 IU/kg
73 %
Anti-Xa in desired range — All measurements in desired range
859 (57 %) of 1520

Anti-Xa in desired range

Best adequacy of anti-Xa levels at 38-85 IU/kg

Safety

No differences in the odds of bleeding events or venous thromboembolism (VTE) between anti-Xa levels

Original publication

A retrospective Cohort study on the effect of the LOw-molecular weighT heparin (LMWH) nadroparin dose on anti-XA levels in a mixed medical-surgical ICU population: CLOT-Xa. J Crit Care. Published 17 December 2024. doi:10.1016/j.jcrc.2024.154991

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