Polydipsia and Polyuria in Dogs

Polydipsia and Polyuria (excessive drinking and urinating) in Dogs

By: PetPlace Veterinarians

Section: Diagnosis In-depth

Diagnostic tests used to determine the cause of polyuria and polydipsia should be considered based on results of a complete medical history and thorough physical examination. Baseline diagnostic tests that your veterinarian may request to evaluate a pet with polydipsia may include:

  • Measurement of water intake at home by the owner (to document the presence of polyuria).

  • Complete Blood Count (CBC)

  • Serum chemistry tests (including electrolytes)

  • Urinalysis

  • Urine culture and sensitivity

    Depending on the clinical situation, your veterinarian might recommend additional diagnostic tests to further investigate the cause of polyuria and polydipsia and provide optimal medical care for your pet. Examples of other tests that may be requested include:

  • Plain abdominal X-ray

  • 24-hour creatinine clearance to evaluate the filtering function of the ki
    dneys

  • Water deprivation testing and anti-diuretic hormone response test

  • Adrenocorticotropin response test, dexamethasone suppression test (low dose and high doses), and urine cortisol-to-creatinine ratio to evaluate for hyperadrenocorticism in dogs

  • Serum parathyroid hormone measurement

  • Abdominal ultrasound exam

  • Chest X-rays, cytological evaluation of lymph node and bone marrow aspirates to evaluate for the cancer lymphosarcoma in pets with hypercalcemia (high blood calcium concentration)

  • Special dye contrast study of the kidneys (called intravenous pyelography or excretory urography) to evaluate for pyelonephritis.

     
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