Correlation between Activated Clotting Time and Activated Partial Thromboplastin Times
| Autor: | Sandra N. Nowak, Maureen A. Smythe, Robert L Begle, Joan C. Mattson, Mamtha Balasubramaniam, John M. Koerber, Susan J. Westley |
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| Rok vydání: | 2002 |
| Předmět: |
Whole Blood Coagulation Time
Databases Factual medicine.drug_class Activated clotting time Pharmacology 03 medical and health sciences 0302 clinical medicine medicine Humans Thromboplastin Pharmacology (medical) 030212 general & internal medicine Retrospective Studies Dose-Response Relationship Drug medicine.diagnostic_test Heparin business.industry Anticoagulant Anticoagulants 030208 emergency & critical care medicine Clotting time Therapeutic drug monitoring Anesthesia Partial Thromboplastin Time business circulatory and respiratory physiology Partial thromboplastin time medicine.drug |
| Zdroj: | Annals of Pharmacotherapy. 36:7-11 |
| ISSN: | 1542-6270 1060-0280 |
| DOI: | 10.1345/aph.1a141 |
| Popis: | OBJECTIVE: To evaluate the correlation between clotting time tests and heparin concentration, the correlation between activated clotting time (ACT) and activated partial thromboplastin time (aPTT) results, and to compare the clinical decisions based on ACT results with those based on aPTT results. METHODS: Retrospective evaluation of a large database containing heparin concentrations, ACT results (1 device), and aPTT results (3 different instruments: 2 bedside, 1 laboratory-based). Correlations between heparin concentrations and clotting time tests and between ACT results and aPTT results were determined. Clinical decisions regarding heparin dosage adjustments based on ACT results were compared with those based on aPTT results. RESULTS: Correlations between clotting time tests and heparin concentrations were r = 0.72 for ACT and r = 0.74–0.86 for the aPTT instruments. The laboratory-based aPTT had the highest correlation to heparin concentrations. The correlation between ACT and aPTT results ranged from r = 0.64–0.67. Heparin dosage adjustment decisions based on ACT results agreed with decisions based on aPTT results 59–63% of the time. CONCLUSIONS: The laboratory-based aPTT has a stronger correlation to heparin concentration than the bedside-based aPTT and ACT. The correlation between ACT and aPTT was similar among 3 different aPTT instruments. Decisions to adjust heparin therapy based on ACT results differed from decisions based on aPTT results more than one-third of the time. |
| Databáze: | OpenAIRE |
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