Transcranial Doppler ultrasound is a noninvasive, portable, and repeatable method for monitoring blood velocities in large intracranial arteries.
May support bedside TCD monitoring in cerebrovascular disease; leaves open need for standardized protocols and outcome trials.
Summary and critique. Advantages of method. TCD is a noninvasive test effective in monitoring blood velocities in large intracranial arteries. It uses small, potentially portable, relatively inexpensive equipment. The test can be repeated and therefore allows the detection of changes over time and after various physiologic studies or pharmacologie intervention, and during various postural and positional changes. TCD can also be used to monitor changes during surgery or other interventions.
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Caplan et al. (1990) studied this question.
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