Primary Care II Senior Dog Care Exam 2 Practice

IRIS Stage 1 CKD in dogs is characterized by a creatinine level of _____.

Less than 1.4 mg/dL 1.5-2.5 mg/dL 2.0-3.0 mg/dL Greater than 3.5 mg/dL

Correct Answer:

Less than 1.4 mg/dL

Explanation:

Creatinine is used as a proxy for glomerular filtration rate (GFR) in IRIS CKD staging. In dogs, Stage 1 CKD corresponds to normal or near-normal kidney function, so the creatinine level is still below 1.4 mg/dL. This means the kidneys aren’t yet filtering at a reduced rate, even though there may be signs of kidney damage or risk factors present. As creatinine rises above that threshold, stages indicate progressively worse kidney function. So a value under 1.4 mg/dL best fits Stage 1.

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