Early morphological disorders in the wall of urinary bladder and ureter in eugamic dogs after contact electroimpulse action

The aim of our study was to study morphology of bladder wall and ureter in dogs after contact electroimpulse action (CEIA), and to detect harmless limits of the method for following electoimpulse lithotripsy in man. 23 eugamic dogs underwent CEIA performed to bladder walls and ureter using electroimpulse lithotripter (Urolith105М, Lithotech Medical, Israel & MedLine, Russian Federation). Contact action was performed with impulse energy from 0.1 to 0.7 J with step of 0.1 J in 2 dogs on each step, and with impulse energy of 0.8-1.0 J in 3 dogs on each step. The wall fragments were off taken by biopsy right after and on the 1st, 6th and 14th days after procedure. CEIA with impulse energy from 0.1 to 0.7 J was a cause of an aseptic inflammation and fragmental epithelial necrosis, and it did not induce total wall damage of urinary bladder and ureter. Increase in threshold of CEIA over 0.7 J was a cause of macrofocal damage in all wall layers including adventitia, and ureter rupture was observed in 3 dogs subjected to the procedure with energy of 0.9-1.0 J by 1-3 day. Conclusion: CEIA with impulse energy from 0.1 to 0.5 J for ureter and from 0.1 to 0.7 J for bladder is harmless.