Growth Hormone Stimulation Test (by L-DOPA/CarbiDOPA)

Specimen Required

5 Clotted Blood Samples

Fasting Required

Purpose of the Test

The Growth Hormone Stimulation Test (by L-DOPA/CarbiDOPA) is usually performed to diagnose growth hormone deficiency or to confirm acromegaly (excess growth hormone production).

When this test is required

The Growth Hormone Stimulation Test (by L-DOPA/CarbiDOPA) is typically ordered when a person is suspected of having growth hormone deficiency or excess growth hormone production. This may include children who are not growing at a normal rate or adults who have symptoms of growth hormone deficiency or excess growth hormone production.

What the Test Detects

The Growth Hormone Stimulation Test (by L-DOPA/CarbiDOPA) measures the ability of the body to produce growth hormone in response to a stimulation agent. L-DOPA and carbidopa are given to stimulate the release of growth hormone from the pituitary gland.

Preparation for the Test

The person being tested should avoid eating or drinking for at least 10-12 hours before the test. They should also avoid strenuous exercise for 24 hours before the test. It is important to inform the healthcare provider of any medications the person is taking, as some medications may interfere with the results of the test.

Sample Requirements

The Growth Hormone Stimulation Test (by L-DOPA/CarbiDOPA) typically requires a blood sample. The sample may be drawn from a vein in the arm or from a fingerstick.

Additional Notes

The results of the Growth Hormone Stimulation Test (by L-DOPA/CarbiDOPA) must be interpreted by a healthcare provider in the context of the person’s medical history and other laboratory tests. It is also important to note that the test may not be accurate in people who are taking certain medications or who have certain medical conditions.

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