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Prosthetics and Orthotics (Spring 2017) > Orthotics Lab 2: Knee Orthoses (2/10/17) > Flashcards

Orthotics Lab 2: Knee Orthoses (2/10/17) Flashcards

1
Q

when considering the characteristics of KOs, it is helpful to classify the orthoses as…

A

flexible, semi-rigid, rigid

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2
Q

is an elastic knee orthosis flexible, semi-rigid, or rigid

A

flexible

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3
Q

are there any motions which are limited or restricted by an elastic knee orthosis

A

no movement is limited or restricted with this

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4
Q

what is the function of an elastic knee orthosis

A

it retains heat in the area, may reduce edema, and provide proprioceptive feedback

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5
Q

what are typical indications for an elastic knee orthosis

A

patients with arthritis in the knee, edema, knee sprains

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6
Q

is an elastic KO with medial lateral support flexible, semi-rigid, or rigid

A

semi-rigid

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7
Q

are there any motions restricted by the elastic KO with medial lateral support

A

valgus and varus are somewhat controlled

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8
Q

why is varus and valgus controlled by Elastic KO with Medial Lateral Support

A

medial and lateral vertical bars

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9
Q

does a true three point pressure system that uses rigid bars and bands exist for an Elastic KO with Medial Lateral Support

A

no

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10
Q

what is the function of an Elastic KO with Medial Lateral Support

A

the same as an elastic KO (retains heat, reduce edema, provide proprioceptive feedback)

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11
Q

what are typical indications for an Elastic KO with Medial Lateral Support

A

patients with knee arthritis, edema, and minor knee sprains

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12
Q

is the Knee Immobilizer flexible, semi-rigid, or rigid

A

semi-rigid

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13
Q

what is the optimum fit of the Knee Immobilizer

A

it should extend superiorly to the upper third of the thigh and inferiorly to approximately 1-1.5 inch above the malleoli

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14
Q

the anterior cut of the Knee Immobilizer should be positioned…

A

over the patella

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15
Q

are there any motions restricted by the Knee Immobilizer

A

some say 3 point pressure system limits knee flexion, extension, varus, and valgus

full restriction of movement is questionable because of semi-rigid design

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16
Q

what is the function of the Knee Immobilizer

A

may be used to decrease movement at the knee post-surg or post trauma

or to assist with upright postural control when there is weakness at the knee (ex-stroke)

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17
Q

what are typical indications for the Knee Immobilizer

A

patient with TKR, acute knee trauma, or weakness at the knee

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18
Q

what are advantages of the Knee Immobilizer over the Elastic KO

A

longer leverage and vertical bars (stays) provide greater support to knee

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19
Q

is the Adjustable Knee Immobilizer flexible, semi-rigid, or rigid

A

semi-rigid

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20
Q

are any motions restricted by the Adjustable Knee Immobilizer

A

it provides tactile cues/increase kinesthetic awareness which may decrease all motions at the knee (hyperextension, flexion, valgus, varus)

questionable because of the semi-rigid design

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21
Q

if motions are restricted what component parts must be present (Adjustable Knee Immobilizer)

A

horizontal bands

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22
Q

3 point pressure system for hyperextension for the Adjustable Knee Immobilizer

A

secondary: combined anterior directed force originating posteriorly from the supra and infra popliteal margins
primary: posterior directed forces originating anteriorly at the superior and inferior margins of the brace

23
Q

3 point pressure system for valgus for the Adjustable Knee Immobilizer

A

a laterally directed force originating from the central portion of the medial bar is balanced by medially directed forces originating from the superior and inferior portion of the lateral bar

24
Q

3 point pressure system for varus for the Adjustable Knee Immobilizer

A

a medially directed force originating from the central portion of the lateral bar balanced by laterally directed forces originating from the superior and inferior portion of the medial bar

25
Q

what are normal indications for the Adjustable Knee Immobilizer

A

it is recommended acutely for post operative or post-traumatic management of the knee

26
Q

what are advantages of the Adjustable Knee Immobilizer over the Elastic KO/Elastic KO with medial/lateral support

A

the adjustable knee immobilizer is more restrictive because of increased length and rigid construction (if horizonatal hardware is present)

27
Q

is the Resting/Positional Splint for the Knee flexible, semi-rigid, or rigid?

A

rigid

28
Q

describe the optimum fit of the Resting/Positional Splint for the Knee

A

the longer the brace, the greater the leverage to maintain ROM at the knee.

this orthosis should extend superiorly to the upper 1/3rd of the thigh and inferiorly to approx. 1-1.5 inches above the malleoli

29
Q

what motions restricted by the Resting/Positional Splint for the Knee

A

flexion, extension, valgus, varus

30
Q

LOOK AT THE 3 POINT PRESSURE SYSTEM PAGE 7

A

yings

31
Q

what is the function of the Resting/Positional Splint for the Knee

A

maintain/increase ROM at the knee

32
Q

when might the Resting/Positional Splint for the Knee be worn

A

night use to gain ROM

don’t want to restrict LE function during the day

33
Q

what are the typical indications for the Resting/Positional Splint for the Knee

A

knee flexion contractures

34
Q

is the Knee Orthosis with Hyperextension Control - Swedish Knee Cage flexible, semi-rigid, or rigid

A

rigid

35
Q

are there any motions controlled at the knee with the Resting/Positional Splint for the Knee

A

hyperextension

36
Q

LOOK AT THE HYPEREXTENSION 3 POINT PRESSURE SYSTEM ON PAGE 8

A

hi

37
Q

what are typical indications for the Resting/Positional Splint for the Knee

A

people with mild hyperextension at the knee

stroke, arthritis, hypotonia

38
Q

disadvantages of the Resting/Positional Splint for the Knee

A

cosmetics - it is bulky and protrudes when sitting

39
Q

is the Knee Orthosis with Hyperextension, Medial-Lateral Control-Three Way Knee Stabilizer flexible, semi-rigid, or rigid

A

rigid

40
Q

what motions are controlled/restricted by the Knee Orthosis with Hyperextension, Medial-Lateral Control-Three Way Knee Stabilizer

A

hyperextension, valgus, varus

41
Q

SEE PAGE 9 FOR 3 POINT PRESSURE SYSTEM

A

yings

42
Q

what are typical indications for Medial-Lateral Control-Three Way Knee Stabilizer

A

for mild hyperextension, valgus, or varus at the knee

43
Q

why would the Medial-Lateral Control-Three Way Knee Stabilizer be preferred over the Swedish Knee Cage

A

the Medial-Lateral Control-Three Way Knee Stabilizer is more cosmetically acceptable and additionally controls medial/lateral motion

44
Q

is the Knee Orthosis with Hyperextension, Medial-Lateral Control-Molded Plast Solid Knee Orthosis flexible, semi-rigid, or rigid

A

rigid

45
Q

are there any motions restricted by the Knee Orthosis with Hyperextension, Medial-Lateral Control-Molded Plast Solid Knee Orthosis

A

hyperextension, valgus, and varus

46
Q

LOOK AT PAGE 10 FOR VARIOUS 3 POINT PRESSURE SYSTEMS

A

yup

47
Q

what are typical indications for Knee Orthosis with Hyperextension, Medial-Lateral Control-Molded Plast Solid Knee Orthosis

A

for mild hyperextension, valgus, or varus at the knee

48
Q

is the Knee Orthosis with Anterior-Posterior, Medial-Lateral, and Rotary/Translation Control flexible, semi-rigid, or rigid

A

rigid

49
Q

describe the position of Knee Orthosis with Anterior-Posterior, Medial-Lateral, and Rotary/Translation Control for optimal fit

A

it extends to the middle third of the thigh superiorly and the middle third of the lower leg inferiorly

50
Q

are there any motions controlled by the Knee Orthosis with Anterior-Posterior, Medial-Lateral, and Rotary/Translation Control

A

hyperextension, valgus, varus, rotation/translation

51
Q

page 12, 3 point system

A

yings

52
Q

what type of knee joint is found on Knee Orthosis with Anterior-Posterior, Medial-Lateral, and Rotary/Translation Control

A

a polycentric knee (as opposed to a single axis knee) joint

53
Q

what does the polycentric knee joint allow for

A

flexion and extension around an instantaneous axis of rotation (which more closely resembles knee)

54
Q

typical indications for Knee Orthosis with Anterior-Posterior, Medial-Lateral, and Rotary/Translation Control

A

when there is significant ligamentous damage to the knee and the individual still wishes to stay active

also post surgical in the sub-acute/chronic phase

Prosthetics and Orthotics (Spring 2017) (14 decks)

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