Diagnostic Testing
Transcranial Doppler (non-imaging)
A non-imaging transducer (looks like a small pencil) is used
with ultrasound gel applied to the head in four different locations. Arterial blood flow is recorded with
Doppler waveforms to assess velocities in the Circle of Willis. This exam documents flow velocities in
the subarachnoid area of the brain.
When aneurysms in these vessels rupture, the resulting bleeding can
cause arterial vasospasms.
Vasospasms may sharply reduce or completely shut off blood flow to
important areas of the brain, causing the same symptoms of a stroke. If this is diagnosed, treatment may
immediately begin to help ease and possibly eliminate the condition and
resulting symptoms.
Indications
for this exam: CVA, ruptured
aneurysm, clipped aneurysm of the brain.
Pomona Valley Hospital Medical Center - 1798 N. Garey Avenue - Pomona, CA 91767 - (909) 865-9500 - Contact Us
