Abstract: A device for the electrolytic dissolution of urinary calculi in patients affected by urinary calculosis, the particularity whereof consists of the fact that it has: a tubular sleeve which is meant to be inserted in the urinary cavities of a patient, a cathode electrode accommodated in the sleeve, and at least one anode electrode which can slide within the sleeve so as to protrude, in an active position, from the sleeve in order to make contact with a calculus and dissolve it electrolytically in association with the cathode electrode.

Abstract: A two ballooned catheter device comprising an inner catheter and an outer catheter slidable one with respect to the other, and a coaxial conduit connected to the proximal end of the outer catheter, a lateral conduit being connected to the outer catheter for introduction of a fluid into a periferal annular space in communication with the balloon of the outer catheter, the inner catheter being connected to the other ballon, and the central annular space between the inner catheter and the outer catheter being in communication with the coaxial conduit, so that a fluid under pressure can be selectively introduced into each balloon and the space between the balloons through the central annular space. The device can be used for confining a sector of a duct or vessel of the body between the two balloons to convey a medicinal or diagnostic fluid into the confined sector or operating through dilation and relaxation of the sector of duct, particularly for the extraction of calculi (FIG. 2).