Urethral blockage due to bladder stone/s is relatively common in cats and dogs. In this case, there was a bladder stone found in the bladder and another stone within the urethra. Urinary catheterization was performed to push the urethral stone back into the bladder and negative contrast was used to highlight the number of stones. Surgical removal of the stones was then performed.
Placement of urinary catheter provides a guideline of the position of the urethra and it can assist to locate lesion/s within the urethra
Negative/positive constrast is useful to highlight pathology within the bladder and urethra .
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