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Rheumatoid Arthritis > Prosthesis > Flashcards

Prosthesis Flashcards

1
Q

PROSTHESIS

A

A device that replaces the function of a missing part

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2
Q

Partial Foot Amputation

Transmetatarsal & tarsometatarsal (Lisfranc)

A
  • Use shoe filler & rocker bar
  • Rocker bar for roll over (push-off)
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3
Q

Partial Foot Amputation

Chopart (midtarsal amputation)

A

Preserves calcaneus & talus

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4
Q

Partial Foot Amputation

Pirogoff

A

Vertical section through calcaneus

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5
Q

Partial Foot Amputation

Boyd’s amputation

A

Talectomy; horizontal section through calcaneus

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6
Q

Syme’s

A

ankle disarticulation

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6
Q

Transtibial (BKA)

Code: “B-Cy A-Co” (Below knee cylindrical, Above knee, conical)

A

Short: <20%
Standard: 20-50%
Long: >50%

Ideal stump shape: cylindrical
Contracture: knee flexion

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7
Q

Knee disarticulation

Code: “TOT”

A

Tenoplastic (Kirk, Callender)
Osteoplastic (Gritti-Stokes)
True disarticulation

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8
Q

Tenoplastic (Kirk, Callender)

A

Sectioned femur is covered with quads tendon

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9
Q

Osteoplastic (Gritti-Stokes)

A

Arthrodesis of patella to sectioned femur

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10
Q

True disarticulation

Simplest & least traumatic

A
  • Removal of tibia, fibula, patella
  • Preserves the distal femoral condyle/epiphysis
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11
Q

Transfemoral (AKA)

A

Short: <35%
Standard: 35-60%
(other references: 33-66%)
Long: >60%*

Ideal stump shape: conical
Contracture: hip flexion & abduction

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12
Q

Single BKA/AKA

A
  • AK prosthesis length has greater trim-down
  • AK prothesis: ¼-½ inches shorter than the BK for foot clearance
  • Scuff (sumasayad): MC in AK prothesis during swing phase
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12
Q

Bilateral BKA

A

Both BK prothesis: 1 inch shorter than the preamputation legs (better balance)

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13
Q

Bilateral AKA

A
  • 1° means of ambulation: wheelchair with posterior displaced wheels (2-2.5”)
  • Reduces height of patient by 12 inches (Lower COG = more stable)
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14
Q

Bilateral AKA

Stubby prosthesis

(young & active individuals)

A

quadrilateral socket with posterior protruding rocker bars

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16
Q

Very short AKA, Hip disarticulation

A
  • Above lesser trochanter
  • Removal of femoral head from the acetabulum
  • Canadian hip disarticulation prosthesis (CDHP)
17
Q

Hemipelvectomy

A
  • Resection of the lower half of pelvis
  • Canadian hip disarticulation prosthesis
18
Q

Hemicorporectomy

A
  • Removal of pelvis, sacrum, coccyx, below L4-L5 level
  • Sitting bucket articulated to CHDP
18
Q

Below Knee Prosthesis

A

Foot-Ankle assembly
Shank
Socket
Suspension

19
Q

Above Knee Prosthesis

A

Foot-Ankle Assembly
Shank
Knee joint/assembly/mechanism
Socket
Suspension

20
Q

Foot-Ankle Assembly

Articulated Components

A
  • (+) mechanical ankle joint
  • Advantage: adjustable
  • Axes:
    Single (most common): allows DF, PF
    Polycentric: allows DF, PF, inv, ev, & slight transverse rotation
21
Q

Foot-Ankle Assembly

Non-articulated Components (8 types)

A
  • (-) mechanical ankle joint
  • Advantages: lighter and quieter
  • Prosthetic foot is directly attached to the shank
  • (+) keel (weight-supporting structure inside the prosthetic foot)
22
Q

SACH

Solid Ankle Cushion Heel (most commonly used)

A

Has wooden keel with cushion heel

23
Q

SAFE

Stationary Attachment Flexible Endoskeleton

A
  • Rigid bolt block (stationary attachment)
  • Flexible keel (flexible endoskeleton)
  • Heavier than SACH
24
Q

STEN

Stored Energy

A
  • 3 wooden keels & 2 rubber plugs
  • Heavier than SACH
24
Q

Seattle

heaviest

A
  • Has C-shaped Delrin keel that acts as a cantilever
  • Heavier than SACH
  • modified into a Seattle-lite foot
25
Q

C II

Carbon Copy II

A
  • Has 2 carbon-composite plates
  • Lightweight
26
Q

Quantum

A
  • Its keel is in the form of spring module
  • Lightweight
27
Q

Flex-Walk

A
  • Made up of carbon-graphite composites
  • Lightweight
28
Q

Flex-Foot

A
  • Distal segment similar to flex-walk
  • Proximal segment extends upward to form as the shank
  • Longer (“footLONG”), lightweight
29
Q

Foot-Ankle Assembly

A

Code: SAFE STreets in SEATTLE are heavy;

Code: “Car Quo Walks Foot
kaya lightweight”

30
Q

Shank
(Exoskeletal)

A
  • Crustacean (has outer shell)
31
Q

Shank
(Endoskeletal)

A
  • Central support/pylon
  • MC used (AKA & BKA)
32
Q

Socket

A

Encapsulates the stump

33
Q

3 Types of Socket

A
  • Patellar Tendon Bearing (PTB) socket (most common)
  • Hard Socket
  • ISNY socket
34
Q

Patellar Tendon Bearing (PTB) socket

most common

A

(+) soft insert to help control edema

35
Q

Hard Socket

A
  • (-) soft insert
  • For patients with good tissue covering & severe perspiration
36
Q

ISNY Socket

Icelandic-Swedish New York socket

A
  • Thermoplastic PTB socket
  • Advantages: thin to dissipate heat, enhances comfort, translucent & easily modified (“TETra”)

Rheumatoid Arthritis (2 decks)

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