Inferior Petrosal Sinus Sampling

Inferior petrosal sinus sampling is often used in patients diagnosed with Cushing’s syndrome. This is a minimally invasive test that is performed to help test the source of the abnormal hormone levels associated with the disease. A catheter is placed in the inferior petrosal sinus where blood samples are taken. Hormones are injected and samples are taken to measure the pituitary’s response to the injected hormones to test its function.