Peer-reviewed veterinary case report
Comparing cat urine tests from home samples and clinic cystocentesis
By Mortier, Femke et al.·Published in Journal of veterinary internal medicine·2023·Small Animal Department·View original on PubMed →
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Original publication title: Comparison of cystocentesis versus home sampling to determine urinary protein: Creatinine ratio and urine specific gravity in cats.
- Species:
- cat
Plain-English summary
A study involving 92 cats looked at how well urine samples collected at home compared to those taken in a veterinary clinic using a method called cystocentesis. The results showed that while home-collected urine was generally acceptable, there were significant differences in protein levels and urine concentration in about 28% and 18% of the cats, respectively. This means that for accurate monitoring of kidney health, it's best to stick with one method of urine collection for each cat. If you're considering collecting urine at home for your cat, it can work, but be aware of these potential differences.
People also search for: cat kidney disease urine test · how to collect cat urine at home · cystocentesis for cats · protein in cat urine · urine specific gravity in cats
Abstract
BACKGROUND: Urinalysis is necessary for the diagnostic evaluation of chronic kidney disease in cats. Performing cystocentesis is not always feasible, but data comparing urine obtained by cystocentesis in the clinic with voided samples collected at home are lacking in cats. OBJECTIVES: To compare urinary protein:creatinine ratio (UPC) and urine specific gravity (USG) and to detect clinically relevant changes in proteinuria substage or urine concentration between urine collected at home and in-clinic by cystocentesis in cats. ANIMALS: Ninety-two healthy and diseased client-owned cats. METHODS: Prospective study. Owners collected voided urine at home and within 1 to 15 hours, cystocentesis was performed in the clinic. RESULTS: In a subset of motivated owners, 55% succeeded in collecting urine at home. Overall, UPC was higher (mean ±SD difference = 0.09 ±0.22; P < .001) and USG was lower (mean ±SD difference = -0.006 ±0.009; P < .001) in cystocentesis samples than in voided urine. Substantial agreement existed between sampling methods for UPC (weighted к = 0.68) and USG (к = 0.64) categories. A different proteinuria substage (UPC < 0.2, 0.2-0.4, >0.4) was present in paired urine samples from 28% of cats. In 18% of cats, urine concentrating ability (USG < or ≥1.035) differed between both samples. CONCLUSIONS AND CLINICAL IMPORTANCE: Home sampling of urine is a valid alternative to cystocentesis in cats. However, because clinically relevant differences in UPC and USG were present in 28% and 18% of cats, respectively, by the same collection method for monitoring each cat is advised.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/37387324/