Hemodynamics, fluids & transfusion

Preliminary insights into monitoring bivalirudin anticoagulation: A retrospective cohort study of activated partial thromboplastin time (aPTT) versus a chromogenic anti-IIa assay

J Clin AnesthPublished Retrospective cohort study

Authors' conclusion

These findings suggest that the anti-IIa assay provides more reliable bivalirudin monitoring than aPTT, with a significant reduction in minor bleeding.

Study context

Population
Adults receiving bivalirudin anticoagulation127 samples
Participants
11 adults
Exposure
Anti-IIa assay vs aPTT
Outcome
Correlation between bivalirudin dose and aPTT or anti-IIa assay
Methodological detailsretrospective comparative cohort
  • Retrospective comparative cohort

Main finding

As reported in the abstract

Correlation of bivalirudin dose with assay

Dose-response slope CV

OutcomeAnti-IIa assayaPTT
r20.650.08

Observational data: associations, not effects.

Further findings

Time in therapeutic range

P < 0.001

Original publication

Preliminary insights into monitoring bivalirudin anticoagulation: A retrospective cohort study of aPTT versus a chromogenic anti-IIa assay. J Clin Anesth. Published 16 April 2025. doi:10.1016/j.jclinane.2025.111836

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