Overview: Deoxycorticosterone TestIntroduction: The Deoxycorticosterone Test measures deoxycorticosterone to assess adrenal disorders, causing high blood pressure or fatigue. Following 2023 Endocrine Society guidelines, it uses an immunoassay for high sensitivity, aiding in endocrine screening. This test is critical for guiding diagnosis, treatment, and improving outcomes in endocrinology for patients with suspected adrenal dysfunction.
Other Names: DOC Assay, Deoxycorticosterone Test.
FDA Status: Laboratory-developed test (LDT), meeting endocrinology standards for diagnostic accuracy.
Historical Milestone: Deoxycorticosterone testing began in the 1970s with adrenal research. Immunoassays emerged in the 1980s, and by the 2000s, high-sensitivity assays improved accuracy.
Purpose: Diagnoses adrenal disorders, guides treatment, and monitors deoxycorticosterone levels in patients with high blood pressure or fatigue.
Test Parameters: 1. Deoxycorticosterone
Pretest Condition: Fasting for 10-12 hours required to stabilize hormone levels. Collect serum or plasma in the morning. Report symptoms like high blood pressure or fatigue, and list medications.
Specimen: 2-5 mL serum (SST) or 2-4 mL plasma (EDTA). Centrifuge within 1 hour. Transport in a biohazard bag within 8 hours.
Sample Stability at Room Temperature: 8 hours
Sample Stability at Refrigeration: 7 days
Sample Stability at Frozen: 6 months
Medical History: Document high blood pressure, fatigue, or history of adrenal disorders. Include current medications, especially steroids or antihypertensives.
Consent: Written consent required, detailing the tests purpose, diagnostic implications, and potential need for adrenal therapy.
Procedural Considerations: Uses an immunoassay to measure deoxycorticosterone levels. Results are available in 3-5 days, enabling clinical decisions.
Factors Affecting Result Accuracy: Non-fasting, stress, or medications can affect results. Hemolysis may degrade samples.
Clinical Significance: Elevated deoxycorticosterone levels suggest adrenal disorders (e.g., CAH), prompting treatment. Normal levels may require further testing.
Specialist Consultation: Consult an endocrinologist for result interpretation.
Additional Supporting Tests: ACTH stimulation test, cortisol levels, or adrenal imaging to confirm adrenal disorders.
Test Limitations: Results may be affected by stress or medications. Clinical correlation is required.
References: Endocrine Society Adrenal Guidelines, 2023; Journal of Clinical Endocrinology, Nieman LK, 2022.
