Role of flow velocity and transient hyperemic response evaluated by transcranial doppler for assesing brain autoregulation in mild traumatic brain injury: a case report

I Gede Patria Demoina , Made Wiryana, Putu Pramana Suarjaya, Adinda Putra Pradhana

I Gede Patria Demoina
Departement of anesthesiology and intensive care sanglah general hospital denpasar. Email:

Made Wiryana

Putu Pramana Suarjaya

Adinda Putra Pradhana

Online First: August 30, 2019 | Cite this Article
Demoina, I., Wiryana, M., Suarjaya, P., Pradhana, A. 2019. Role of flow velocity and transient hyperemic response evaluated by transcranial doppler for assesing brain autoregulation in mild traumatic brain injury: a case report. Bali Journal of Anesthesiology 3(2). DOI:10.15562/bjoa.v3i2.174

Head injuries are a common case throughout the world, based on data from the Centers for Disease Control, emergency cases, hospitalization cases, and also deaths due to head injuries have increased in the decade 2001-2010. Cerebral autoregulation (CA) is a mechanism for cerebral blood flow (CBF) regulation if there is a change from cerebral perfusion pressure (CPP). The mechanism of brain autoregulation is negative feedback that holds back the increase in mean arterial pressure (MAP) by reducing the diameter of blood vessels so that CBF returns to normal, whereas if MAP falls, brain autoregulation tends to widen blood vessel diameter so that CBF is normal. Transcranial doppler examination can be one of the modalities of investigation that is very useful in patients with head injuries. Transcranial doppler in patients with a head injury can be used to measure mean flow velocity of cerebral artery media and transient hyperemic response test, both of which can assess the prognosis of a course of head injury.


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