Intracranial Doppler flow diagram (TCD)

Intracranial Doppler flow imaging (TCD) has a certain diagnostic value for intracranial stenosis. Measurement of blood flow parameters of various blood vessels, including peak flow velocity, end-diastolic flow velocity, average flow velocity, and resistance index, can be used as early screening. Sexual diagnosis method. Wash the hair with shampoo the day before the test (do not rub the hair gel, head oil), rest well before the test, do not take sleeping, analgesic, sedative. Patients who take anti-epileptic drugs can not stop taking drugs, but tell the doctor. Basic Information Specialist Category: Cardiovascular Examination Category: CT Applicable gender: whether men and women apply fasting: not fasting Tips: Wash your hair with shampoo the day before (do not rub the hair gel, head oil). Normal value The blood flow rate is normal and there is no abnormal blood flow. Clinical significance Abnormal result The following checks have abnormalities that are morbid (1) The local blood flow velocity is increased or there is a large lateral difference (>2S) at the stenosis. (2) The pulsation is reduced in the area after the stenosis. (3) Abnormal blood flow that causes spectrum broadening in any area. (4) The rapid increase of blood flow velocity in the posterior communicating artery or anterior communicating artery suggests a collateral circulation. (5) The ratio of blood flow in the "unbalanced" brain artery; for example, the blood flow velocity of the posterior cerebral artery exceeds that of the middle cerebral artery. (6) cerebral vasospasm caused by stenosis, such as subarachnoid hemorrhage, blood flow velocity increased by 50% or middle cerebral artery blood flow velocity reached 120CM / S. Need to check population epilepsy, intracranial tumors, intracranial inflammation, cerebrovascular disease, brain trauma, encephalopathy, mental function, brain resuscitation, sleep disorders and so on. Precautions Taboo before the test: Wash the hair with shampoo the day before the test (do not rub the hair gel, head oil), rest well before the test, do not take sleeping, analgesic, sedative. Patients who take anti-epileptic drugs can not stop taking drugs, but tell the doctor. Do not wear jewelry. Eat before eating, it is not appropriate to check on an empty stomach. Requirements for inspection: Actively cooperate with the doctor. Turn off the phone and BP power switch when checking. Inspection process The patient was observed in the brain before sitting in front of the TCD. Not suitable for the crowd Inappropriate people: those with brain injury.