Purpose of the Evaluation
- Differentiate between Central and Nephrogenic Diabetes Insipidus.
- Distinguish Polyuria-Polydipsia syndrome from Primary Polydipsia.
- Assess the pituitary gland's ability to secrete Antidiuretic Hormone (ADH).
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Identify the root cause of excessive thirst and frequent urination using advanced Copeptin testing. This evaluation accurately differentiates between types of Diabetes Insipidus and primary polydipsia, ensuring a precise clinical diagnosis.
Scientific name: Diabetes Insipidus Evaluation (Copeptin & Osmolality)
This evaluation measures Copeptin levels and urine osmolality to assess fluid regulation. It effectively differentiates central or nephrogenic Diabetes Insipidus from primary polydipsia, facilitating accurate management and treatment.
Service type
Specialized laboratory test
Duration
15-30 minutes
Fasting
8-12 hours fasting
Included Services
- Copeptin measurement
- Urine osmolality test
- Plasma osmolality test
Medical Service Information
When to Perform This Test
- Unexplained excessive thirst despite high fluid intake.
- Frequent and excessive urination (large volumes).
- Persistent nocturia (waking up at night to urinate).
- Suspicion of posterior pituitary dysfunction.
Interpreting Results
- Low Copeptin levels typically suggest Central Diabetes Insipidus.
- High Copeptin levels relative to osmolality may indicate Nephrogenic Diabetes Insipidus.
- Normal levels help confirm Primary Polydipsia (psychogenic thirst).
Conditions & Notices
- Inform the doctor about all current medications
- Restrict fluid intake for a specific period as directed by the physician
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