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Mechanisms by which thrombolytic therapy results in nonuniform lysis and residual thrombus after reperfusion
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sriram Anand Kudallur, Venkat Pitman, E. Bruce Diamond, Scott L. |
| Copyright Year | 2007 |
| Abstract | A transport reaction model describing penetration of plasmin by diffusion and permeation into a dissolving fibrin gel was solved numerically to explore mechanisms that lead to the formation and growth of dissolution fingers through blood clots during thrombolytic therapy. Under conditions of fluid permeation driven by arterial pressures, small random spatial variations in the initial fibrin density within clots (±4 to 25% peak variations) were predicted by the simulation to result in dramatic dissolution fingers that grew in time. Within vitro experiments, video microscopy revealed that the shape of the proximal face of a fibrin gel, when deformed by pressure-driven permeation, led to lytic breakthrough in the center of the clot, consistent with model predictions of increased velocities in this region leading to cannulation. Computer simulation of lysis of fibrin retracted by platelets (where more permeable regions are expected in the middle of the clot due to retraction) predicted cannulation of the clot during thrombolysis. This residual, annular thrombus was predicted to lyse more slowly, because radial pressure gradients to drive inner clot permeation were quite small. In conjunction with kinetic models of systemic pharmacodynamics and plasminogen activation biochemistry, a two-dimensional transport-reaction model can facilitate the prediction of the time and causes of clot cannulation, poor reperfusion, and embolism during thrombolysis. |
| Starting Page | 964 |
| Ending Page | 974 |
| Page Count | 11 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/BF02684132 |
| PubMed reference number | 9395042 |
| Journal | Medline |
| Volume Number | 25 |
| Alternate Webpage(s) | https://www.seas.upenn.edu/~diamond/Pubs/1997_Anand_Annals_Biomed_eng.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/BF02684132 |
| Journal | Annals of Biomedical Engineering |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
