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Updated: Apr 28, 2026
11:17
Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood
Published on: October 12, 2012
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[Computer aided dosage management of phenprocoumon anticoagulation therapy. Clinical validation]
R Dissmann1, L J Cromme, A Salzwedel
1Priv.-Doz. Dr. med. Rüdiger Dissmann, Medizinische Klinik II (Kardiologie und Nephrologie), 27574 Bremerhaven, Germany, Tel. 047 71/299 33 65, Fax 047 71/299 33 67,
Hamostaseologie
|June 4, 2014
Summary
The computer-aided TheMa system accurately guides phenprocoumon (PPC) anticoagulation, matching physician performance. TheMa also predicts optimal timing for procedures after stopping anticoagulation therapy.
Area of Science:
- Pharmacology
- Medical Informatics
- Clinical Medicine
Background:
- Anticoagulation therapy management is complex.
- Accurate dosing of phenprocoumon (PPC) is crucial for patient safety and treatment efficacy.
- Existing methods for guiding anticoagulation require refinement.
Purpose of the Study:
- To validate a novel multiparameter computer-aided expert system, TheMa, for guiding phenprocoumon (PPC) anticoagulation.
- To compare the accuracy of TheMa-guided anticoagulation with physician-guided therapy.
- To assess TheMa's ability to predict the optimal timing for procedures after anticoagulation interruption.
Main Methods:
- Prospective investigation involving 22 patients.
- Comparison of physician-guided PPC dosage with TheMa-recommended dosage using "twin calculation" of INR values.
- Evaluation of TheMa's prediction of INR phase-out curves after therapy discontinuation.
Main Results:
- TheMa demonstrated accuracy comparable to physician guidance across three quantitative measures: polygon integration (607.86 vs. 616.17), INR hits in target range (161 vs. 166), and time in therapeutic range (TTR) (62.40% vs. 63.91%).
- TheMa accurately predicted INR phase-out curves after anticoagulation interruption, with a prognosis of 1.8 INR and a standard deviation of 0.50 ± 0.59 days.
Conclusions:
- The multiparameter computer-aided expert system (TheMa) provides anticoagulation guidance with accuracy equivalent to physician-led therapy.
- TheMa is a valuable tool for determining optimal surgical or procedural timing following the interruption of anticoagulation therapy.
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