Publications by Guillaume Cédric Yves Petitpierre

Enhanced torque steerable guidewire

Philippe Renaud, Guillaume Cédric Yves Petitpierre, Marc Jasper Boers, Colin Darbellay

The invention provides for a steerable guidewire for insertion into a body cavity, characterized in that it comprises an elongated body (101) defining a longitudinally-arranged lumen (200) comprising i) a proximal end portion (100) and ii) a distal end por ...

2020

Steerable device and system

Philippe Renaud, Guillaume Cédric Yves Petitpierre, Marc Jasper Boers

A steerable device for use as e.g. a guidewire for insertion into a subject's body is disclosed. The device features a single side deflection of a bendable portion located at its distal end by application of a longitudinally-directed force either on an inn ...

2019

A Microfluidic Brain Interface for In Vivo Recording of Neurochemical Activity

Guillaume Cédric Yves Petitpierre

Neurological disorders have a strong negative impact on the quality of life of affected patients, their close relatives as well as on the health economic system. Early diagnosis associated with better treatment outcomes remain difficult to reach. Similarly ...

EPFL2017

Endoluminal nerve modulation device and methods for using thereof

Philippe Renaud, Guillaume Cédric Yves Petitpierre

The invention provides for a device (100) for use in electrical nerve modulation in a subject, characterized in that it comprises a rotational and linear actuator (110); a tubular element (101) having a proximal end connected to the actuator (110) and a di ...

2017

In vivo neurochemical measurements in cerebral tissues using a droplet-based monitoring system

Philippe Renaud, Guillaume Cédric Yves Petitpierre, Bernard Schneider, Arnaud Bertsch, Philippe Colin, Aurélien Thomas

Direct collection of extracellular fluid (ECF) plays a central role in the monitoring of neurological disorders. Current approaches using microdialysis catheters are however drastically limited in term of temporal resolution. Here we show a functional in v ...

Nature Publishing Group2017

Droplet extraction module for the analysis of segmented flow generated by a neural probe

Philippe Renaud, Guillaume Cédric Yves Petitpierre, Arnaud Bertsch, Colin Darbellay

We recently developed a neural probe allowing to capture at high temporal resolution nano-volume droplets of interstitial fluid from the brain organized in a segmented flow. In order to enable the analysis of these small volume and low concentration drople ...

2016

Neural probe combining microelectrodes and a droplet-based microdialysis collection system for high temporal resolution sampling

Philippe Renaud, Arnaud Bertsch, Guillaume Cédric Yves Petitpierre

We propose a novel neural probe which combines microfluidic channels with recording and stimulation electrodes. The developed microfabrication approach enables the concentration of every active element such as electrodes and the sampling inlet in close pro ...

Royal Society of Chemistry2016