Preventing kidney injury during anaesthesia in the dog with CKD
12-year-old dog with IRIS stage 2 chronic kidney disease (creatinine 1.9 mg/dL), scheduled for a dental cleaning with extractions and removal of a skin mass.
Which approach is most effective for preventing perioperative acute kidney injury?
chevron_right Show answer and explanation
A. Monitor and maintain blood pressure throughout anaesthesia, provide appropriate fluid therapy, avoid NSAIDs and other nephrotoxins and recheck creatinine afterwards
Correct. Anaesthetic hypotension is a classic cause of hospital-acquired kidney injury. Keep mean pressure at around 60–70 mmHg or above (systolic ≥ 90), use opioids and local blocks for analgesia and recheck renal function afterwards.
B. Give furosemide at premedication to ensure urine output during surgery
The diuretic reduces circulating volume just when anaesthetics cause vasodilation and hypotension: it increases the risk of kidney injury rather than reducing it.
C. Withhold water for 12 hours beforehand to reduce the risk of regurgitation
Withholding water is unnecessary, and in a dog with CKD, which relies on drinking to compensate for polyuria, it promotes dehydration before anaesthesia.
D. Give meloxicam before surgery as pre-emptive analgesia, since creatinine is below 2 mg/dL
NSAIDs inhibit the renal prostaglandins that maintain filtration when blood pressure falls. Combined with anaesthetic hypotension they are a typical cause of acute kidney injury, especially with pre-existing CKD.
lightbulb Key takeaway
Preventing kidney injury in hospital is easier than treating it: identify at-risk patients (CKD, age, heart disease, dehydration), avoid combining NSAIDs, ACE inhibitors and diuretics, review doses of renally excreted drugs and correct hypotension as soon as it appears.
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Updated: October 31, 2026 · Educational content for veterinary professionals. It does not replace current clinical guidelines or the judgement of the attending veterinarian.