Brain ultrasound, also known as transcranial Doppler diagnostic instrument, transcranial Doppler diagnostic instrument shows fast flow rate may be caused by vasospasm, stenosis and other reasons.
Transcranial Doppler diagnostic instrument shows fast flow rate, divided into the whole brain flow rate increase, single branch or individual 1~2 branches of blood flow rate increase.
Increased blood flow velocity in the whole brain may be caused by cerebral vasospasm due to hyperthyroidism, anemia, fatigue, etc. Cerebral vasospasm is a functional change due to increased excitability of cerebral vascular adrenergic nerves and increased α-receptor excitability, which leads to excessive contraction of cerebral blood vessels and caliber, resulting in an increase in blood flow velocity.
Increased blood flow velocity in a single branch or individual 1~2 branches is usually caused by cerebrovascular stenosis, which is an organic lesion, such as the elderly population, due to atherosclerosis, resulting in thickening of the inner wall of the blood vessel, narrowing of the lumen, and the blood flow has not changed, but there will be an increase in blood flow velocity when passing through the lumen of the narrowing of the blood vessel.
If the transcranial Doppler diagnostic instrument shows a fast flow rate, accompanied by other discomforts, it is important to consult a doctor in time to clarify the cause and then target treatment.