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Nonsurgical removal of urethral uroliths using a self-retaining retractor with elastic stays in female guinea pigs (Cavia porcellus): 16 Cases (2006–2019)

Abstract Sixteen cases of client-owned female guinea pigs (Cavia porcellus) involved urethrolith removal directly from the urinary orifice or urethra with the aid of a lightweight self-retaining retractor ring with elastic stays. The procedure was performed in fifteen guinea pigs and repeated once due to reoccurrence of urolith formation. Urethrolithiasis was diagnosed by direct palpation of the urethrolith, and in all but one case confirmed radiographically. Uroliths were removed whole or in sections after direct visualization with the help of the retractor. Only minor complications associated with the procedure were observed and most patients survived to discharge. This is the first case series to describe the use of a self-retaining retractor to facilitate simple non-surgical removal of urethroliths in female guinea pigs. This procedure is rapid, minimally invasive, technically simple and cost effective in female guinea pigs with uroliths in the urinary orifice or distal urethra.