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Thromb Haemost 1973; 30(02): 352-362
DOI: 10.1055/s-0038-1649085
Original Article
Schattauer GmbH

Formation and Embolization of Thrombi after Electrical Stimulation

On the Method and Evaluation of Drugs
B. A Spilker   *
1   Department of Pharmacology, B. V. Philips-Duphar, Weesp, The Netherlands
,
H van Balken
1   Department of Pharmacology, B. V. Philips-Duphar, Weesp, The Netherlands
› Author Affiliations
Further Information

Publication History

Received for publication 30 March 1973

Accepted for publication 30 May 1973

Publication Date:
30 June 2018 (online)

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Summary

Characteristics of thrombi produced upon electrical stimulation of mesentery and brain vessels were studied in five species. Parameters for measuring drug effects were also evaluated to determine which were sensitive to platelet aggregation inhibitors. The current required to cause vasoconstriction in 50% of the rat mesentery arteries stimulated was increased by vasodilators, but not by inhibitors of platelet aggregation. The threshold of current necessary to cause thrombus formation was increased by Imipramine in both acute and chronic experiments and by aspirin and papaverine in chronic experiments. Since these were the only agents tested which inhibit platelet aggregation there appears to be a relationship between this property and the threshold of current necessary to cause thrombus formation. This parameter may possibly be used to differentiate between platelet aggregation inhibitors and streptokinase-like or heparin-like agents. Changes in mean embolization time under present conditions were not related to activity in inhibiting platelet aggregation.

* Present address : Dept. of Pharmacology, Sterling-Winthrop Research Institute, Rensselaer, New York 12144.


 

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