Other

Eth Zurich

Unversität Zürich

Eidgenossische Technische Hochschule Zurich

Peter Niederer

Markus Hugo Muser

Hans Jörg Häuselmann

Erik Hedbom

Emanuela Keller

Andreas Nadler

Martin Stoddart

Emmanuela Keller

The invention concerns a method and an apparatus for mechanical stimulation in vitro of tissue, wherein tissue patches () are retained in a tissue carrier (), thereby presenting first surfaces () to be stimulated in a plane (X) and wherein a roller () having a second surface () arranged at its periphery is moved parallel to said plane (X), thereby imposing selected forces on said first surfaces () by said second surface () for stimulating the tissue patches (). By presenting the surfaces () to be stimulated in a common plane (X) and by moving the roller () parallel to said common plane (X) of the first surfaces (), serving several tissue carriers () with one roller () is made easy, thus integration into an industrial production is made practicable.

Method and apparatus for mechanical stimulation of tissue in vitro

A device has a source for emitting near infrared radiation into cerebral tissue, a sensor for detecting radiation exiting from the tissue, and an evaluation unit which detects the exiting radiation as an input signal having pulsatile and non-pulsatile components and is programmed to determine the concentration of an injected indicator in the tissue from the non-pulsatile signal component, iteratively determine an inflow function characterizing cerebral blood flow by varying a mean transit time until reaching a stop criterion, determine indicator concentration relative to cerebral blood volume from the inflow function and the pulsatile signal component, calculate cerebral blood volume by dividing indicator concentration in the tissue by indicator concentration relative to cerebral blood volume, calculate cerebral blood flow by dividing the cerebral blood volume by the mean transit time when the stop criterion has been reached, and scale the inflow function using values determined from the pulsatile signal component.

Device and method for measuring blood flow in an organ

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Zurich, Switzerland

Peter Niederer