Study – Impact of the Japet.W exoskeleton on intradiscal pressure

Result of the study conducted by Japet on the impact of the Japet.W exoskeleton on intradiscal pressure within the area of the lumbar spine.


In order to assess the exoskeleton’s impact on the lumbar pressure, intradiscal pressure measurements are collected, on an inert subject set up with the device.


A pressure sensor was placed in the area of the lumbar intervertebral discs, allowing a continuous measurement of the intradiscal pressure. The recording was started with the exoskeleton turned off. After a few seconds, the exoskeleton was turned on, then turned off again after 2 minutes of acquisition.

Pressure sensors


Numerical and cadaveric studies have shown a decrease in the intradiscal pressure by applying a traction force through the exoskeleton.

We can conclude from this study that wearing the Japet.W exoskeleton makes it possible to reduce the intradiscal pressure in the lumbar discs by up to 40% compared to its initial pressure.


Fahed Zairi1 , Mélissa Moulart2 , Christian Fontaine3 , Régis Logier4 , Vincent Tiffreau5 , Fahmi Zairi6

1 Department of neurosurgery, Hôpital Privé le Bois, Ramsay Général de santé, Lille France 2 Japet Medical Device, Lille France
3 Department of Anatomy, Lille University Hospital, Lille France
4 CIC-IT, Lille University Hospital, Lille France
5 Rehabilitation Unit, Lille University Hospital, Lille, France;
6 Lille University, Civil Engineering and geo-Environmental Laboratory (EA 4515 LGCgE), 59000 Lille, France


Subscribe to our newsletter to receive the latest news.