10-08-2012, 12:02 PM
Lower Limb Prosthetics Research
Lower Limb Prosthetics Research.pdf (Size: 1.68 MB / Downloads: 314)
Areas of Investigation in Lower-Extremity Prosthetics
• Amputation surgery/techniques
• Therapy/training
• Identification of clinically useful outcome measures
• Models: simulation, walking, FEA
• Osseo-integration
• Fabrication—Rapid prototyping, CAD/CAM, and
materials
• Componentry
Current Status of Lower Limb Prosthetics Research
• Unsubstantiated claims by manufacturers.
• Small sample sizes; case studies.
• Goals for what we are trying to achieve
are ill-defined: What is optimal?
Studies of Prosthetic Feet
Compared with a SACH foot, dynamic response feet:
• Have increased range of motion.
(Linden et al., 1999; Rao et al., 1998; Lehmann et al., 1993; Torburn
et al., 1994)
• Store and return more energy.
(Gitter et al., 1991; Czerniecki et al., 1991; Postema et al., 1997;
Macfarlane et al., 1997)
• Decrease impact loading to sound leg foot.
(Powers et al., 1994)
• May reduce energy required to walk.
(Schneider et al., 1993; Macfarlane et al., 1997)
Endolite Telescopic-Torsion (TT) Pylon Mercury TT Pylon
• 5-8 mm vertical travel (nominal);
13 mm travel maximum.
• 30 degrees internal and external
rotation.
• Three different stiffness springs
and torsion rods to accommodate
range of weights and activity
levels.
• Can be fit with a number of
different feet.
Prolite Smart Magnetix Knee
Utilizes Rheonetic™ MR fluid
dampers from the Lord Corp.
• Improves mobility; makes climbing
up and down stairs and inclines
much easier.
• Increases gait balance, stability and
energy efficiency.
• A fraction of the cost of other highend
knee products.
• Less costly, less complex and more
dependable than state-of-the-art,
motor-controlled, active damper
systems.