New: Accurate Noninvasive Recording of the Arterial
Blood Pressure Wave:
Read more ..
Latest TCD News:
the first study (3) using ambulatory transcranial Doppler
monitoring equipment was
reported in the January 2004 issue of Stroke. (The link should take you
ot the abstract of the article)
New from Hemodynamics AG: Ambulatory TCD Monitoring
using Microrobotic technology - The problem of probe fixation and
maintaining Doppler signal has hampered the more general use of TCD for
monitoring purposes, even with the use of dedicated TCD probe headgear. At the
7th Meeting of the ESNCH, in Bern, May 26 - 28, 2002 we first
demonstrated a possible way to solve these problems.
This consists of a very compact instrument with matching headgear. Not only is
it so small and uses so little power that it can be carried like a Holter ECG;
in addition, its microrobotic probe automatically locks on to the Doppler
signals. The same unit, when connected to a laptop, can perform like a
'high-end' investigative TCD unit, recording the full Doppler data for later
scientific analysis. The first study using the ambulatory TCD monitoring
equipment was recently
reported in Stroke.
History: the 'UrDoppler' -- the first
dedicated Transcranial Doppler instrument (1) was designed
and constructed by Dr. Rune Aaslid in 1981- 82 at the then new Vascular
Laboratory of the Neurosurgical Department of Inselspital in Bern, Switzerland.
It is still going strong and is in daily routine use.
Later, in 1989 - 91, it was complemented by the first dual-channel TCD
instrument (2) which was used extensively for scientific
work, and monitoring in the ICU.
However, we're definitely not at the end of the road for dedicated TCD machines
-- in spite of the recent development of Imaging and Power TCCD. For embolus
monitoring, and for functional, autoregulatory and other cerebral hemodynamic
studies, dedicated TCD instruments are still superior to their larger (and more
expensive) TCCD counterparts.