Electronic device to improve the efficiency of extracorporeal lithotripters
The design and construction of autonomous electronic instrumentation to generate fast high voltage discharges (6to 10 kV) on a piezoelectric crystal array, in order to produce underwater shock waves, is described. If properlyfocused, hundreds of these shock waves are capable of destroying renal and...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2004 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:47420208 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=47420208 |
| Access Level: | acceso abierto |
| Palabra clave: | Ingeniería ESWL Cavitation Tandem shock waves Piezoelectric shock wave generation |
| Sumario: | The design and construction of autonomous electronic instrumentation to generate fast high voltage discharges (6to 10 kV) on a piezoelectric crystal array, in order to produce underwater shock waves, is described. If properlyfocused, hundreds of these shock waves are capable of destroying renal and ureteral calculi. This clinicaltreatment, developed more than 20 years ago, is known as extracorporeal shock wave lithotripsy (ESWL). Incontrast to standard devices, our system produces two, rather than just one, shock waves with an adjustable delaybetween 50 and 950 µsec. The objective is to enhance cavitation-induced damage to the kidney stone withoutincreasing tissue trauma. Kidney-stone model fragmentation tests, obtained with the novel system, were comparedto those achieved with a conventional piezoelectric shock wave generator, showing a 20% increase infragmentation efficiency. Initial in vivo studies with animals have shown reduced tissue trauma. |
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