Study of cystine urinary calculi in dogs.

Abstract

The composition and structure of 48 canine cystine urinary stones were determined by infrared spectroscopy, scanning electron microscopy and electron dispersive X-ray analysis. The infrared analysis showed that about 45% of the specimens were composed of pure cystine. The remainder also contained calcium oxalate (mono and/or dihydrate), magnesium ammonium phosphate hexadydrate (struvite), calcium hydrogen phosphate dihydrate (brushite) and complex urates (ammonium, ammonium potassium and/or potassium enriched ammonium urate). The infrared study of several samples heated at 620 degrees C and 750 degrees C revealed the presence of apatitic calcium phosphate. This compound was difficult to detect in the spectrum of the original samples due to the small proportion of phosphate contained in the calculi and to band overlapping. The examination of a series of selected samples by means of scanning electron microscopy and energy dispersive X-ray analysis complemented the infrared results.

• Authors: E Escolar, J Bellanato, M Rodriquez
• Journal: Canadian journal of veterinary research = Revue canadienne de recherche veterinaire (Can J Vet Res) Vol. 55 Issue 1 Pg. 67-70 (Jan 1991) ISSN: 0830-9000 [Print] Canada
• PMID: 1884286 (Publication Type: Journal Article)

Chemical References

• Apatites
• Calcium Phosphates
• Magnesium Compounds
• Phosphates
• Calcium Oxalate
• Uric Acid
• Cystine
• Struvite
• Magnesium
• calcium phosphate, dibasic, dihydrate

Topics

• Animals
• Apatites (analysis)
• Calcium Oxalate (analysis)
• Calcium Phosphates (analysis)
• Cystine (analysis)
• Dog Diseases (diagnosis)
• Dogs
• Electron Probe Microanalysis
• Magnesium (analysis)
• Magnesium Compounds
• Male
• Microscopy, Electron, Scanning
• Phosphates (analysis)
• Spectrophotometry, Infrared
• Struvite
• Uric Acid (analysis)
• Urinary Calculi (chemistry, ultrastructure, veterinary)