Liner
A flexible sleeve, typically made of silicone, polyurethane, or thermoplastic elastomer, worn directly over the residual limb to provide cushioning, suspension, and skin protection within a prosthetic socket.
Full Definition
In prosthetics, a liner (also called a prosthetic liner or socket liner) is the interface material placed between the residual limb and the rigid prosthetic socket. Liners serve multiple functions: they distribute mechanical stress, protect skin integrity, provide suspension via pin-lock or lanyard mechanisms, and can incorporate antimicrobial properties. Editorial accuracy requires distinguishing the liner from the socket itself, from shrinker socks, and from prosthetic socks used for volume management. Clinical documentation frequently specifies liner material, thickness, and suspension type, all of which have distinct HCPCS billing implications.
Usage
Usage note: Always qualify with material type (e.g., 'silicone liner,' 'polyurethane liner') in clinical and funding documents to support billing specificity.
In Context
- "The prescription specified a 6 mm cushion liner with a locking pin to provide suspension for the transtibial prosthesis." — Prosthetic device prescription
- "Editors should note that 'liner' and 'prosthetic sock' are not interchangeable; liners are made of elastomeric materials and serve a suspension function that socks do not." — Prosthetics product catalog editorial note