Antidiuretic hormone (ADH)

Antidiuretic hormone (ADH), also known as vasopressin, plays a crucial role in regulating water balance in the body.

Here's a structured overview of key aspects regarding ADH:

What is analysed?

ADH levels in the blood or urine are analysed to assess its concentration and function.

What does the result mean?

The result indicates the concentration of ADH in the body and its efficiency in regulating water balance.

Why undergo the analysis?

Analysis of ADH levels helps diagnose conditions related to water balance such as diabetes insipidus or syndrome of inappropriate antidiuretic hormone secretion (SIADH).

When to undergo the analysis?

The analysis is typically recommended when symptoms suggestive of water balance disorders, such as excessive thirst or urination, are present.

What sample is required?

Blood or urine samples may be required for ADH analysis.

Is any prior preparation necessary?

In most cases, no special preparation is required. However, it's essential to follow any specific instructions provided by the healthcare provider.

How is it used?

ADH analysis aids in diagnosing and monitoring conditions affecting water balance and kidney function.

What are the normal values?

Normal ADH levels in the blood typically range between 1 to 5 picograms per millilitre (pg./mL). In urine, normal levels are usually less than 4 picograms per millilitre (pg./mL).

ADH Values Reference Table

Test

Normal range (pg/mL)

Blood ADH 1 - 5 Urine ADH < 4

 

This table provides a reference for the normal ranges of ADH levels in blood and urine, aiding in the interpretation of test results.

What do altered values signify?

Elevated ADH levels may indicate conditions like SIADH, while low levels may suggest diabetes insipidus or other related disorders.