TF Suspension

Question 1

Atmospheric pressure

Ex: suction socket with valve; locking liner, hypobaric sock; augmented vacuum

Answer 1

Ind: whenever feasible
And: mini pistoning; best proprioception; greatest range of motion
Dis: precise fit, consistent donning necessary, works best with stable RL volume

Question 2

Anatomic

Ex: supracondylar wedge for knee disarticulation

Answer 2

Ind: KD, congenital malformations
Adv: good suspension; rotation control
Dis: suspension pressure localized

Question 3

Straps

Ex: Silesian belt variants; prefabricated elastic suspension belt

Answer 3

Ind: RL volume changes anticipated
Adv: amputee-adjustable; good auxiliary suspension, control rotation
Dis: some pistoning belt may be uncomfortable; donning properly takes skill

Question 4

Hinges

Ex: pelvic joints and belt

Answer 4

Ind: short RL or weak hip abductors
Adv: max m/l support partial rotational control
Dis: heavy, bulky awkward to don; allows significant pistoning; can be uncomfortable when sitting