The use of echo-doppler in the study of renal damage sustained during percutaneous manoeuvres and extracorporeal lithotriptic treatments

The echo-doppler is a non-invasive diagnostic method that makes evaluation of the morphology and the renal intraparenchymal vessel flow possible. Due to the development and spread of percutaneous methods and to the large number of patients who undergo extracorporeal lithotripsy, the renal parenchyma suffers traumas of which neither the short no long term consequences are yet fully understood. We calculated the Resistive Index using echo-doppler in 10 pts. who underwnt extracorporeal lithotripsy and we looked for the possible presence of arteriovenous fistulae in 10 pts. who underwent percutaneous manoeuvres (nephrostomy, litholapaxy and endopyelotomy). The results showed an increased R.I. in all patients at the end of the treatment, and in only one patient was this elevated R.I. maintained at the follow-up after 30 days. Arteriovenous fistulae were not found in any of the other patients.