Intravenous iodinated contrast media transiently increases urine specific gravity and pH without affecting other urinalysis parameters after computed tomography examination in dogs.

Iopromide administration in dogs undergoing CT scans transiently increases urine specific gravity and pH without affecting other urinalysis parameters.

The study by Barthe et al. investigated the immediate effects of iopromide, a nonionic iodinated contrast medium, on urinalysis parameters in dogs undergoing computed tomography (CT) scans. The researchers focused on urine specific gravity (USG), urine dipstick parameters, urinary sediment, and the urine protein-to-creatinine ratio (UPCR). The findings revealed that intravenous administration of iopromide led to a transient increase in USG and urine pH without significantly affecting other urinalysis parameters. This suggests that while iopromide may cause temporary changes in urine concentration and acidity, it does not substantially alter other aspects of urine composition in the short term following CT imaging. These results are consistent with previous studies that have observed similar transient effects of contrast media on urine specific gravity in dogs. For instance, Feeney et al. reported significant alterations in urine specific gravity following intravenous administration of triiodinated contrast medium, with changes primarily related to pre-injection USG values rather than the dosage of contrast medium. ([pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov/7429935/?utm_source=openai)) Additionally, Katzberg et al. observed a decrease in glomerular filtration rate (GFR) in dogs after contrast media administration, indicating potential renal effects. ([pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov/3080383/?utm_source=openai)) However, the current study by Barthe et al. did not find significant changes in other urinalysis parameters, suggesting that the transient increases in USG and urine pH may not be clinically significant. Veterinary professionals should be aware of these transient changes when interpreting urinalysis results in dogs that have recently undergone CT imaging with iodinated contrast media.

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