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- W2049539947 abstract "The standard methods for recanalyzing thrombosed vessels are vascular stenting or administration of thrombolytic drugs. However, these methods suffer from uncertain success rate and side-effects. Therefore, minimally-invasive ultrasound methods have been investigated. In this article, we propose to use shockwaves after pre-exposure to fibrinolytic agent for disrupting thrombus. Shockwaves were delivered by an extracorporeal piezocomposite generator (120 mm in diameter, focused at 97 mm, pulse length = 1.4 μs). In vitro blood clots, made from human blood, were placed at the focal point of the generator. The clots were exposed to shockwaves either with or without prior immersion in a solution of streptokinase. The percentage of lysed clot was determined by weighing the clot before and after treatment. The proportion of lysed clot increased with the pressure at the focus and with the number of shocks. A mean clot reduction of 91% was obtained for 42 MPa in 4-min treatment duration only, without using streptokinase. For a treatment of 2 min at 29 MPa, the clot reduction increased significantly (p < 0.01) from 47% without streptokinase to 82% when streptokinase was used prior to shockwaves. These results also showed no significant damage to streptokinase due to exposure to shockwaves. This study suggests that extracorporeal shockwaves combined with streptokinase is a promising pharmaco-mechanical method for treating occlusive thrombus, and should be confirmed by in vivo trials. Additional studies must also be conducted with other fibrinolytic agents, whose abilities to penetrate clots are different. (E-mail: [email protected])" @default.
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- W2049539947 date "2009-06-01" @default.
- W2049539947 modified "2023-10-16" @default.
- W2049539947 title "Blood Clot Disruption in vitro Using Shockwaves Delivered by an Extracorporeal Generator after Pre-Exposure to Lytic Agent" @default.
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- W2049539947 doi "https://doi.org/10.1016/j.ultrasmedbio.2008.11.016" @default.
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