| Material | serum or EDTA plasma or heparin plasma 0.5 ml |
| Method | photometry |
| Duration | 1 day |
| Remark | - In addition to SDMA, creatinine is the most specific indicator for renal function. However, due to the reserve capacity of the kidneys, elevated levels only occur if the kidney damage exceeds 70%. Lipaemia and haemolysis can cause false elevation of values. In well-muscled or trained dogs, creatinine may be increased physiologically, without there being a renal dysfunction.
- Protein/creatinine-ratio in the urine (midstream urine or urine from cystocentesis) and SDMA serve the early detection of renal dysfunction.
- Cattle: increase of creatinine is an important indicator for insufficient feed intake/body weight loss.
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