Doc #: 60-00118 Rev. A
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Vaso-Motor Reactivity Exam
1. The Vaso-Motor Reactivity (VMR) Exam is intended to measure the cerebral vascular
reserve and generate a VMR Index.
2. This exam can be performed unilaterally with a hand-held probe or bilaterally with a
headframe and (2) monitoring probes.
3. The difference between a VMR exam and the monitoring exam is that there are pre-
defined events in the VMR exam.
4. When this exam is selected, there are three protocol options:
1. CO2 Inhalation
2. CO2 Inhalation with Hyperventilation
3. Breath Holding.
5. When the desired protocol is selected, the exam screen will be displayed. Vessels should
be located in the usual manner and the exam started with the Start Exam button.
6. When the exam is started the first pre-defined event will appear in the event text box.
When this button is clicked, a snapshot will be taken and the next event in the protocol will
appear. After the last event has been captured, the display will advance to the VMR
Review page.
Do not press the “End Exam” button to end the exam, the study will
terminate automatically.
7. From the Exam Review page, each event marker can be dragged to the exact location of
the event occurrence. The VMR index will be displayed on the right side of the trend
graph.
VMR Report
