This test measures the amount of lithium in the blood. Lithium is a drug that is used to treat bipolar disorder. Bipolar disorder is a mental condition that

Erythrocyte sedimentation rate (ESR) is an indirect measure of the degree of inflammation present in the body. It measures the rate of fall (sedimentation) o

The Endocrine Society recommends that a test for plasma free metanephrine or urine metanephrine be used to help detect the presence of phaeochromocytomas and

This test measures the amount of metanephrines that are excreted in the urine over a 24-hour period. Metanephrines are the inactive metabolites of the catech

Dyspepsia (indigestion) is a common symptom characterised by discomfort or pain in the upper abdomen. It typically occurs after eating or drinking. Symptoms may include early satiation, uncomfortable fullness, bloating, nausea, vomiting, belching, flatulence, heartburn, regurgitation and diarrhoea.