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[Piezo-electric lithotripsy technic with echographic guidance (EDAP LT 01)]
G Vallancien1, J Dory, B Veillon
1Département d'Urologie, Centre Médical Chirurgical de la Porte de Choisy, Paris.
Annales D'Urologie
|January 1, 1987
Summary
Piezo-electric extracorporeal lithotripsy utilizes ultrasonography for precise stone localization and fragmentation. This minimally invasive treatment, requiring patient confidence and urologist expertise, offers high success rates with few complications.
Area of Science:
- Utilizes piezo-electric elements and 5 MHz ultrasonography for stone fragmentation.
- Achieves high pressure (900 bars) at the focal point (15 mm x 5 mm) for effective stone destruction.
Context:
- Extracorporeal lithotripsy (ECL) is a non-invasive procedure for kidney stone removal.
- Ultrasonographic detection is crucial for accurate stone localization, with a reported miss rate of only 1% for intrarenal stones.
Purpose:
- To describe the material and technique for piezo-electric extracorporeal lithotripsy with ultrasonographic guidance.
- To highlight the efficacy, safety, and procedural requirements of this lithotripsy method.
Summary:
- The procedure employs a mobile firing head with a 5 MHz transducer and 320 piezo-electric elements for stone localization and fragmentation.
- Requires precise ultrasonographic stone localization and patient cooperation, enabling treatment without anesthesia.
- Optimal fragmentation necessitates a prolonged firing time (45-60 minutes), with a 26% retreatment rate and rare secondary complications (3%).
Impact:
- This technique is suitable for 90% of cases on an outpatient basis, reducing healthcare costs.
- Successful implementation requires urologist expertise in stone pathology and management of potential complications.
- Offers a minimally invasive alternative to endoscopic or surgical treatments for kidney stones.