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Symptoms » Polyuria » Diagnostic Tests

Diagnostic Tests for Polyuria

Diagnostic Test list for Polyuria:

The list of diagnostic tests mentioned in various sources as used in the diagnosis of Polyuria includes:

  • Physical examination
    • Examine state of hydration
    • Blood pressure
    • Examine for signs of complications of Diabetes mellitus including cataracts, diabetes retinopathy, hypertension, ischemic heart disease, stroke, peripheral vascular disease, Candida skin and genital infections, peripheral neuropathy
  • Blood tests
    • Full blood count and ESR
    • Renal function tests, electrolytes including calcium levels (elevated levels of calcium may cause Polyuria)
    • Thyroid function tests
    • Pituitary hormones (LH, FSH, TSH, ACTH, prolactin, GH), if suspect pituitary diabetes insipidus
    • High plasma osmolality and high plasma sodium in diabetes insipidus
    • Low plasma osmolality in habitual overdrinking
    • Plasma ADH, if suspect Diabetes insipidus
    • Fasting blood sugar level. Diagnosis of Diabetes mellitus requires fasting blood sugar level to be greater or equal to 7.0 mmol/L
    • Random blood sugar level. Diagnosis of Diabetes mellitus requires random blood sugar level to be greater or equal to 11.1 mmol/L and the person must also have symptoms of elevated blood sugar including frequent urination, excessive thirst and unexplained weight loss
    • 2 hour post 75g Oral glucose tolerance test for diagnosis of Diabetes mellitus in borderline cases or for diagnosis of gestational diabetes with a blood glucose level of greater or equal to 11.1 mmol/L
    • HbA1C - measures the average blood glucose level over the past 3 months.
    • PTH level - If increased this would suggest parathyroid tumor, parathyroid hyperplasia or ectopic PTH secretion.
  • Urine tests
    • Urinalysis will help determine if there is glucose in the urine and thus may suggest diabetes, chronic nephritis, hyperthyroidism or Fanconi syndrome
    • Urine sample for microscopy and culture
    • 24 hour urine volume and 24 hour fluid intake should be measured to determine if urine volume is substantially increased or normal
    • Low urine osmolality in diabetes insipidus
    • Spot urine sodium
    • Water deprivation test, if suspect diabetes insipidus
    • 24 hour urinary calcium level
  • Radiological investigations
    • X-Ray of the skull
    • CT Brain , if suspect pituitary diabetes insipidus
    • Parathyroid ultrasound scan may detect larger parathyroid tumors
    • CT Scan or MRI parathyroid are more sensitive with detecting parathyroid tumors
    • Renal biopsy - may be necessary if suspect kidney disease.

Home Diagnostic Testing

These home medical tests may be relevant to Polyuria causes:

Conditions listing medical symptoms: Polyuria:

The following list of conditions have 'Polyuria' or similar listed as a symptom in our database. This computer-generated list may be inaccurate or incomplete. Always seek prompt professional medical advice about the cause of any symptom.

Select from the following alphabetical view of conditions which include a symptom of Polyuria or choose View All.

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