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BK Suspension
Overview of Transtibial Suspension
Generic Class Suspension | Examples | Primary Indication | Major Advantages | Chief Limitations |
---|---|---|---|---|
Atmospheric Pressure | Roll on locking liners; hypobaric socks; augmented vacuum systems; elastomeric knee sleeves | Whenever clinically feasible | Minimizes pistoning; best proprioception; greatest ROM | Precise fit so consistent donning necessary; best with stable limb volume |
Anatomic | Supracondylar, supracondylar suprapatellar, removable medial wedge | To increase knee stability, for short limb or ligamentous laxity | Easy to don and doff even with dexterity or vision problems; M-L stability; suprapatellar limits hyperextension | Restricts full knee flexion; suspension pressure is localized |
Straps | Cuff; cuff + waist belt; fork strap + waist belt | Residual limb volume changes anticipated | Amputee adjustable; good aux. suspension | Some pistoning; discomfort from waist belt; tight cuff may inhibit circulation |
Hinges | Thigh corset (joints and lacer) | Damaged knee or residual limb; previous successful user | Max M-L and A-P stability; partial unloading of residual limb | Heavy, bulky, awkward to don; allows significant pistoning |