SafeTex (asker) Dec 5, 2021:

@ Liz Hello

Your late disagree surprised me but I now realise that I should have perhaps said that my phrase was "Coque ou corset siège"

Therefore,as I already have "body brace", which I believe is the equivalent of "custom Sitting Support Orthosis (SSO)" - your answer -, I thought that I needed something that was specifically the seat, as opposed to a body brace to help you stay in a sitting position.

But now I'm wondering if an anatomic seat can indeed by used on an aeroplane as it would have to be attached to the normal seat so I will ask the client

so your disagree did get me to look at this again and seek confirmation

Thanks

liz askew Dec 3, 2021:

Here we are:

Sitting Support Orthosis (SSO)
Home / Your Visit / Patient Education / Sitting Support Orthosis (SSO)
A custom Sitting Support Orthosis (SSO) is a molded polypropylene shell mounted in a lightweight but rigid base. It’s covered with fabric and vinyl. An SSO is custom-made and specifically designed to meet each person’s needs. The shell’s anterior support (which could be a chest strap, shoulder straps or a vest) and the pelvic belt help keep people correctly positioned in the SSO, providing maximum support.

liz askew Dec 3, 2021:

custom-made brace?

liz askew Dec 3, 2021:

https://www.specialisedorthoticservices.co.uk/products/custo...

Samuël Buysschaert Dec 3, 2021:

Just a thought Maybe something along the lines of shape/custom molded/moulded seating (system), as it seems to be an important aspect of the seat.

From your link
"Le corset siège est une installation anatomique adaptée au patient handicapé.
Il est destiné à apporter un soutien et une correction au corps déficient en position assise. Il est aussi appelé siège moulé. "