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Direct comparison of enoxaparin and nadroparin in a rabbit model of arterial thrombosis prevention
M. Vlasin, M. Dvorak, M. Dvorakova, P. Rauser, L. Lexmaulova, Z. Gregor,
Language English Country United States
Document type Comparative Study, Journal Article
- MeSH
- Arteries MeSH
- Enoxaparin therapeutic use MeSH
- Heparin, Low-Molecular-Weight therapeutic use MeSH
- Heparin therapeutic use MeSH
- Clinical Trials as Topic MeSH
- Rabbits MeSH
- Nadroparin therapeutic use MeSH
- Thrombosis drug therapy prevention & control MeSH
- Animals MeSH
- Check Tag
- Rabbits MeSH
- Male MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Comparative Study MeSH
INTRODUCTION: The aim of the study was to evaluate and compare the efficacy of standard unfractionated heparin (UFH) and low-molecular weight heparins (LMWH's). MATERIALS AND METHODS: We modified a previously published rabbit model of arterial thrombosis prevention [1,2] to compare unfractionated heparin and two different doses of two low-molecular weight heparin fragments--nadroparin and enoxaparin. Thrombosis in the distal aorta was triggered by vessel wall injury and critical stenosis. Blood flow in the damaged arterial segment was monitored by a flow probe placed distal to the constrictor. The primary endpoints of the study were: (1) cumulative flow, (2) time to occlusion and (3) residual clot weight. Thirty six animals were split into 6 groups with six animals in each group. Control groups were given saline or heparin and four more groups were used to compare LMWH's at 2 different doses. RESULTS: In our study, all treatments were superior to the saline control group (alpha
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- $a Vlasin, Michal $u University of Veterinary and Pharmaceutical Sciences Brno, and st. Ann's Faculty Hosital Brno, Czech Republic. vlasinm@vfu.cz
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- $a Direct comparison of enoxaparin and nadroparin in a rabbit model of arterial thrombosis prevention / $c M. Vlasin, M. Dvorak, M. Dvorakova, P. Rauser, L. Lexmaulova, Z. Gregor,
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- $a INTRODUCTION: The aim of the study was to evaluate and compare the efficacy of standard unfractionated heparin (UFH) and low-molecular weight heparins (LMWH's). MATERIALS AND METHODS: We modified a previously published rabbit model of arterial thrombosis prevention [1,2] to compare unfractionated heparin and two different doses of two low-molecular weight heparin fragments--nadroparin and enoxaparin. Thrombosis in the distal aorta was triggered by vessel wall injury and critical stenosis. Blood flow in the damaged arterial segment was monitored by a flow probe placed distal to the constrictor. The primary endpoints of the study were: (1) cumulative flow, (2) time to occlusion and (3) residual clot weight. Thirty six animals were split into 6 groups with six animals in each group. Control groups were given saline or heparin and four more groups were used to compare LMWH's at 2 different doses. RESULTS: In our study, all treatments were superior to the saline control group (alpha<or=0,01). Standard heparin was inferior (alpha<or=0,05) to both low molecular weight heparins for all primary endpoints (cumulative flow, time to occlusion and residual clot weight). There were no differences between the LMWH's except for cumulative flow at high doses. CONCLUSIONS: This study revealed no relevant differences between nadroparin and enoxaparin for the primary endpoints of our model. Clinical use of each drug remains a personal preference.
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