VASS
Pronunciation: vass (rhymes with 'mass')
Also written as: VASS — Vacuum-Assisted Socket System
Vacuum-Assisted Socket System; a prosthetic suspension method that uses mechanical or electronic vacuum to create negative pressure between the residual limb and the socket.
Full Definition
VASS stands for Vacuum-Assisted Socket System and refers to a class of prosthetic suspension in which a pump—either body-powered or battery-operated—evacuates air from the socket-liner interface to maintain consistent contact and reduce pistoning. VASS is associated with improved proprioception, reduced skin breakdown, and greater user confidence during dynamic activities. Editors should expand the acronym on first use in any document and ensure it is styled in all capitals without periods. It should not be confused with simple suction suspension, which relies on a one-way valve rather than an active or passive pump.
Usage
Usage note: Always expand on first use. Style as 'VASS' (all caps, no periods). Do not conflate with passive suction sockets.
In Context
- "The study compared VASS with pin-lock systems across 42 transtibial prosthesis users over a 12-month period." — Clinical research article
- "Ensure VASS is expanded as 'Vacuum-Assisted Socket System' on first mention in the patient education leaflet." — Editorial checklist