Adrenaline (Epinephrine) Sample Type: Plasma

Adrenaline (Epinephrine) – Plasma Test (Summary): This test measures adrenaline levels in plasma to assess adrenal function and diagnose conditions like pheochromocytoma or autonomic disorders. Adrenaline is a hormone involved in the "fight or flight" response, affecting heart rate, blood pressure, and glucose levels. The test requires the patient to rest beforehand, and the sample is collected in a chilled EDTA tube. Elevated levels may indicate stress, tumors, or heart issues, while low levels can point to autonomic failure.

By Allschoolabs · August 4, 2025 · 36 views

Adrenaline (Epinephrine) – Plasma Test
Sample Type: Plasma

Purpose:
This test measures the concentration of adrenaline (epinephrine) in the plasma to assess adrenal medulla function, diagnose catecholamine-secreting tumors (e.g., pheochromocytoma), or investigate unexplained hypertension and stress-related disorders.

About Adrenaline:
Adrenaline is a catecholamine hormone and neurotransmitter produced mainly by the adrenal medulla. It plays a critical role in the body's "fight or flight" response, increasing heart rate, blood pressure, and blood glucose levels.

Indications for Testing:

Suspected pheochromocytoma or paraganglioma

Episodes of sudden high blood pressure, palpitations, sweating, or headaches

Autonomic dysfunction evaluation

Monitoring stress responses in critically ill patients

Preparation & Collection:

The patient should rest quietly for at least 15–30 minutes before sample collection.

Avoid caffeine, nicotine, and strenuous activity prior to the test.

Blood is drawn into a tube containing EDTA, kept chilled, and plasma is separated and frozen promptly.

Normal Reference Range (may vary by lab):
< 100 pg/mL (can vary depending on posture and stress levels)

Clinical Significance:

Increased Levels: Pheochromocytoma, severe stress, hypoglycemia, acute heart failure, trauma

Decreased Levels: Autonomic failure, certain adrenal insufficiencies