harnessing for body powered prostheses ryan spill, cp advanced arm dynamics september 30, 2010
TRANSCRIPT
Harnessing forHarnessing forBody Powered ProsthesesBody Powered Prostheses
Ryan Spill, CPAdvanced Arm DynamicsSeptember 30, 2010
Figure 8 harness
• Suspension
• Control
Axilla loop
Inverted Y suspension
Inverted “Y” Strap for Suspension
Control Strap
Figure 9 Harness
• Provides control of TD only
• Alternate suspensory technique
Self-Suspending Socket Design with Figure 9 Harness
Custom Harness Designs
• Patient prefers suction
socket• Figure 9
harness for TD control• Distal
attachment to frame
Modified Control Cable
• Patient lives substantial
distance from office
• Heavy duty user
Alternate Control Cable
Alternate Anchor instead of Axilla Loop
Modified Triceps Cuff
Medial Cross Bar Assembly
BilateralFigure 8
Figure 8 harness
• Efficient• Suspension & Control
Suspension strap
Elbow Lock/Unlock
Elbow/TD control
Figure 8 Harness
Lock/Unlock Lock/Unlock ControlControl
Figure 8 Harness for Triple Figure 8 Harness for Triple ControlControl
Double Ring
Control Cable mounted Laterally
locklock
Control Strap Mounted Medially
Transhumeral Chest StrapTranshumeral Chest Strap
• Left Transhumeral amputee secondary to
trauma
• Contralateral hand weakness
TranshumeralTranshumeralChest StrapChest Strap
HarnessAttachmentLock/Unlock Cable
Easier for donning than
Figure 8
Control Strap
Modified Chest Strap
• Narrow Straps
• Medial lock/unlock attachment
allows locking by abduction
• Elastic suspensory
straps
• Control strap travels through
keeper attached to
elastic
Chest strap for Elbow Disarticulation
Modified Harness• Left transhumeral
amputee• Secondary to burns• Compromised hand
strength
Initial Chest Strap
Elastic Chest Strap Attached to Axilla Loop
Combination of Figure 8 and Chest Strap Designs
Socket Modification to Assist Harness
• Silicone Locking Liner• Proximal and Distal
Suspension Strap
Thank You!