Week 3 Flashcards
What are the socket design goals?
Contouring for functioning muscles
Stabilize skeletal structures
Broad pressure over neuro-vascular bundles
Forces distributed over wide area
What are the gluteal region muscle compartments?
Gluteus Maximus Gluteus medius Gluteus minimus Tensor fasciae latae 6 deep lateral rotators
What are the characteristics of the quadrilateral socket design?
Four well defined walls
Rectangular in shape
Ischial-gluteal weight bearing
What are the characteristics of the ischial containment socket?
Femur help in adduction
Very intimate fit
Triangular shape
What are the advantages of the quadrilateral socket design?
Well documented
Consistent procedure for fabrication
What are the disadvantages of the quadrilateral socket design?
Not custom shape
Femur not held in adduction
Lack of support in medial wall
What are the advantages of the ischial containment socket?
Enhanced biomechanical stability
Increased medial wall support
Strong gluteal and hydrostatic loading
Restoration of pelvic-femoral angle
What are the disadvantages of the ischial containment socket?
Too many inconsistent designs
Requires skill to fabricate
Suction suspension is indicated for?
Long limbs Stable volume Good skin integrity Good upper limb strength Majority of patients
What are the contraindications for suction suspension?
Patients with volume fluctuation
Short residual limbs
Severe scarring
Upper extremity involvement
Who is silicone suction indicated for?
Longer residual limbs
Stable limb volume (can add socks)
No upper limb involvement
What are the contraindications for silicone suction?
Unstable limb volume
Upper limb involvement
Skin sensitivity to material
What are the advantages of silicone suction?
Provides positive suction suspension
Does not limit range of motion
Reduces shear forces
What are the disadvantages of the silicone suction?
Difficult to don
Skin reaction to material
Rotation control
The True Silesian Belt has a double or single anterior attachment?
Double anterior attachment
Modified Silesian Belt has a double or single anterior attachment?
Single anterior attachment
What are the indications of the Silesian Belt?
Auxiliary suspension is required Rotational control needed When suction can't be used May aid in coronal control Patient security
What are the contraindications of the Silesian belt?
When there is no need for frontal plane control (long limbs with good strength primary)
What are the advantages of the Silesian belt?
Easy to don
May add coronal stability
Adjustable
What are the disadvantages of the Silesian belt?
Increased straps and buckles
Increased bulk around waist
Where is the pelvic band located?
Between the iliac crest and trochanter
The Hip Joint & Pelvic band are indicated for?
Maximum ML control
Weak hip abductors or short residuum
Ease of donning is important, previous wearers
What is a contraindication of the Hip joint & pelvic band?
When not needed/indicated
What are the advantages of the Hip joint & pelvic band?
Easy to don, good swing phase control, increased ML stability
What are the disadvantages of the hip joint & pelvic band?
Extremely bulky
Inherent pistoning
Increased weight
What are the indications of suspenders?
Last resort
Previous wearer
Need to reduce forces around pelvis
Patient with abdominal scarring
What is a contraindication of suspenders?
Whenever anything else will do
What are the two most important factors of the knee system?
Voluntary control
Inherent stability
What are the knee friction goals?
Primarily for swing phase
To control knee friction
Limit heel rise
Prevent terminal impact
What are the knee friction types?
Mechanical friction
Fluid friction
Outside friction
Mechanical friction knee is?
Simple in design Adjustable Constant friction Static resistance to force Offers no stance phase stability
Fluid friction knee is?
Complex in design Heavier, more maintenance Dynamic resistance to force Offers some stance phase stability Smooth gait Patients with varying cadence
