• Journal of Veterinary Clinics
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• v.21 no.2
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• pp.205-208
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• 2004

A 9 year-old male Maltese with dysuria, pollakiuria, and stranguria was brought to the Veterinary Teaching Hospital, Chonnam National University. A right lateral abdominal radiograph was shown that 3 uroliths existed at the caudal aspect of the os penis and 5 uroliths existed in the passage of os penis. Uroliths were extracted by voiding urohydropropulsion and cystotomy in Maltese dog. The complication of cystotomy was hematuria, which might persist up to 2 days postoperatively but dysuria was not observed. So we applied voiding urohydropropulsion and cystotomy, and got a good prognosis. Gross examination of extracted uroliths were separated one from another but it was identified the same componet of calcium oxalate by stone quantitative analysis.

• Journal of Veterinary Science
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• v.23 no.5
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• pp.65.1-65.10
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• 2022

Background: Persistent uroliths after a cystotomy in dogs are a common cause of surgical failure. Objectives: This study examined the following: the success rate of retrograde urohydropropulsion in male dogs using non-enhanced computed tomography (CT), whether the CT mean beam attenuation values in Hounsfield Units (mHU) measured in vivo could predict the urolithiasis composition and whether the selected reconstruction kernel may influence the measured mHU. Methods: All dogs and cats that presented with lower urinary tract uroliths and had a non-enhanced CT preceding surgery were included. In male dogs, CT was performed after retrograde urohydropropulsion to detect the remaining urethral calculi. The percentage and location of persistent calculi were recorded. The images were reconstructed using three kernels, from smooth to ultrasharp, and the calculi mHU were measured. Results: Sixty-five patients were included in the study. The success rate of retrograde urohydropropulsion in the 45 male dogs was 55.6% and 86.7% at the first and second attempts, respectively. The predominant components of the calculi were cystine (20), struvite (15), calcium oxalate (8), and urate (7). The convolution kernel influenced the mHU values (p < 0.05). The difference in mHU regarding the calculus composition was better assessed using the smoother kernel. A mHU greater than 1,000 HU was predictive of calcium oxalate calculi. Conclusions: Non-enhanced CT is useful for controlling the success of retrograde urohydropropulsion. The mHU could allow a prediction of the calculus composition, particularly for calcium oxalate, which may help determine the therapeutic strategy.

• Journal of Veterinary Clinics
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• v.26 no.4
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• pp.331-335
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• 2009

This paper was performed to investigate the propensity of the diameter of maximum distended urethra from urethra to os penis in mature male dogs of 25 male dogs of different breeds. The measured sites of urethras were divided into 7 regions, i.e. prostate, membrane, isthmus, perineum, scrotum, prescrotum and os penis. By using the inflated balloon catheter filled with contrast medium, the maximum diameter of the distended urethras of each region was recorded and compared among regions. The mean diameter of the lumen from the prostatic urethra to the os penis urethra was gradually narrowed except for the isthmus portion, with a sense of resistance for retraction being noted at the level of ischiatic arch in 22 dogs. Proposed results from this should be utilized as a predictor of a treatment plan for the removal of urethroliths using an urohydropropulsion.