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AK Suspension
Overview of Transfemoral Suspension
Generic Class Suspension | Examples | Primary Indication | Major Advantages | Chief Limitations |
---|---|---|---|---|
Atmospheric pressure | Suction socket; roll on locking liner; hypobaric sock; augmented vacuum systems | Whenever clinically feasible | Minimizes pistoning; best proprioception; greatest ROM | Precise fit, consistent donning necessary; best with stable limb volume |
Anatomic | Supracondylar wedge (knee disartic) | Knee disartic or congenital malformation | Good suspension, rotational control | Suspension pressure is localized |
Straps | Silesian belt, TES belt | Residual volume change anticipated | Amputee adjustable; good aux suspension; rotational control | some pistoning, belt discomfort and cosmesis |
Hinges | Pelvic joint and belt | Short residual limb, weak abductors | Max M-L support; some rotational control | Heavy, bulky, awkward to don; pistoning; discomfort when sitting |