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Ureteral Papilla Implantation as a Technique for Neoureterocystostomy in Cats

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Objective

To evaluate ureteral papilla implantation for neoureterocystostomy in cats. Study Design

Experimental study. Animals

Five domestic shorthair cats. Methods

The ureteral papilla was resected and the ureter isolated to the level of the renal hilus. The ureter was reimplanted into the apex of the bladder and the contralateral kidney was removed. Serum creatinine concentrations were measured daily for 7 days, then every other day from days 7–14, then every 3rd day until day 35. Ultrasound examination (once during the first 4 days, then again on day 35) and intravenous pyelography (day 35) were performed to assess ureteral patency. Histologic examination of the anastomosis was performed on day 35. Results

Serum creatinine concentration remained within reference range for all cats except for a transient (<24 hour) increase (2.2, 2.3, and 3.6 mg/dL respectively) in 3 cats. Ultrasound examination and intravenous pyelography revealed no evidence of ureteral obstruction. Histologic examination revealed complete mucosal epithelialization of the anastomosis, moderate inflammation localized to residual suture material, and no evidence of vascular compromise of the ureteral papilla. Conclusion

Implantation of the ureteral papilla is a viable technique for neoureterocystostomy in cats. Clinical Relevance

Advantages of ureteral papilla neoureterocystostomy include the technical ease of suturing the ureteral papilla, reduced risk of ureteral obstruction because sutures are not placed directly within the ureteral lumen and a more secure anastomosis because a complete 2-layer closure is performed.
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Keywords: cats; kidney transplantation; neoureterocystostomy; ureteral anastomosis; ureteral papilla; ureteroneocystostomy

Document Type: Research Article

Affiliations: From the University of Wisconsin, School of Veterinary Medicine, Departments of Surgical Sciences and Pathobiological Sciences, Madison, WI and Medtronic Physiological Research Laboratories, Minneapolis, MN.

Publication date: July 1, 2005

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