Lab
Why do you tap the cast after filling it?
Why are plaster buildups applied?
To create a relief in the socket for pressure intolerant areas
What does PTB stand for?
Patella Tendon Bearing
Why do we use shrinkers post-op?
Reduces pain, reduces edema, aids in venous return, sized, consistent constant pressure, aids in limb desensitization, difficult to put on wrong
How do you get the heel down?
Flex the socket
Extra points: dorsiflex the foot
True or False: You should ALWAYS use a hammer to break out a plaster bucket.
False
Why is plaster removed in certain areas?
To create areas of pressure for weightbearing in pressure tolerant areas
What do the medial and lateral trim lines encompass?
The medial and lateral femoral condyles.
Define myodesis
Muscle to bone tie off during amputation
What does the Prosthetist hang his hat on?
The fit of the socket
What would you use to excavate a large area of plaster? (ex the popliteal region)
Scarpas knife
What are the pressure intolerant areas?
Distal end of tibia, distal end of fibula, fibular head, tibial crest, tibial tubercle, hamstring tendons
True or False: the distal end of the residuum is a weight-bearing surface
False (unless the case of a Symes amputation)
Bonus where is that/ what level?
Describe the Ertle procrdure.
The bone bridge between the fibula and tibia (can give the patient some end bearing capability/ but not seen often)
Is diabetes a vascular disease?
No
What's the perfect plaster consistency?
pancake batter
island technique
milkshake
What are the pressure tolerant areas?
Mid-patellar tendon, Medial flare of the tibia, M/L pre tibial area, Fibular shaft, Popliteal/ gastric
What are the components of a prosthesis?
Socket
suspension
shank
foot
True or False: we cast in 20 degrees of knee flexion to put hamstrings under tension.
False it causes the hamstrings to relax
PTB, TSB, hybrid
How do you increase the speed of a plaster reaction?
Use warm water, agitate, or add salt
Would you remove more or less plaster from your mold if you have a patient with a bony residuum?
Less plaster
What socket style would you use for a patient with medial and lateral knee instability?
Joint and thigh lacer (most stable) or
Supracondylar socket
What is bench alignment?
flexion 5
adduction 5
toe out 5-7
inset foot 1/2"
anterior socket 1/2 - 1 1/4"
What are the 6 major roles of a Prosthetist?
diagnose
measure
design
fabricate
fit
follow up