The Transcranial Doppler Simulator - M-mode now included

Screenshot of M-mode Transcranial Doppler

The TCD Simulator is based on a comprehensive mathematical model of the anatomy and physiology of the cerebral circulation. The ultrasound insonation and the Doppler signals are realistically simulated. With this program you can practice the different TCD approaches on your computer and examine a wide variety of cerebral circulatory pathology. More...

Ongoing Research: A highly Accurate Method for Noninvasive Arterial Blood Pressure Recording

Flow restriction principle for noninvasive blood pressure recording

The flow restriction principle [1] is based on using the arterial wall as a sensor. If this wall is balanced (partially collapsed, hence restricting the flow) between the pressure inside (ABP) and the pressure in the cuff, these pressures should be approximately equal. By using a very fast pneumatic servo system, the artery can be kept in this state throughout the heart cycle. The waveform recorded from the cuff is then a very accurate representation of the arterial blood pressure. While the study cited below was based on 1970'ties analog technology, we are now developing a superior device based on modern digital technology.

1. Aaslid R, Brubakk AO: Accuracy of an ultrasound Doppler servo method for noninvasive determination of instantaneous and mean arterial blood pressure. Circulation 1981;64:753-9 Abstract Full text (PDF)

Page Updated: 2022-10-24