Dried solidified blood calculi in the urinary tract of cats.

摘要: We have noted an increased number of calculi submitted to the Gerald V. Ling Urinary Stone Analysis Laboratory, University California, Davis, that do not contain crystalline material but appear be composed dried solidified blood (DSB). Canine and feline laboratory records from 1986-2003 were reviewed for samples >99% DSB. No dogs found, specimens 49 cats DSB, which almost half (n = 22) had been after 2001. The DSB removed surgically or by postmortem examination all areas upper lower urinary tract. All well formed could divided in with Rongeur forceps. Detailed case information was available 12 cats. Urinalyses 9 cats, mean specific gravity 1.017 (range, 1.009-1.032). Red cells reported sediment most containing >100 RBC/hpf. Ureteral obstructions no radio-opaque visible radiography, including radiographic contrast studies. Reports ultrasound examinations 10 discrete recorded. In addition polarized light microscopy, infrared spectroscopy electron probe microanalysis performed on a subset 6, calculi; n 3, control calculi) samples. Significantly more carbon, nitrogen, sulfur (P .012, P .02, respectively) present elemental analysis than calculi, suggesting are primarily organic material. At this time, we uncertain why these become solidified, recommend both formalin preservative free further investigate their etiology.