Abstract
Transcranial Doppler (TCD) ultrasound monitors change in cerebral perfusion. This is accomplished through noninvasive continuous measurement of blood flow-velocity within the largest intracranial blood vessels. Since normative velocity values may vary widely, the primary monitoring objective generally is the trending of relative velocity. Changes in blood flow and flow-velocity are proportional as long as blood viscosity and vessel diameter remain constant [1].
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Edmonds, H.L. (2012). Transcranial Doppler. In: Koht, A., Sloan, T., Toleikis, J. (eds) Monitoring the Nervous System for Anesthesiologists and Other Health Care Professionals. Springer, Boston, MA. https://doi.org/10.1007/978-1-4614-0308-1_11
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