Limb Deficiencies

Question 1

Limb development starts at __ weeks gestation.

Answer 1

4 weeks

Then 3 extra weeks for buds to differentiate into limbs

Question 2

Proximal femoral focal deficiency is hypoplasia of proximal femur with affected leg held in what position and foot at what level compared to opposite knee?

Answer 2

Hip flex/ABD/ER and knee flex

Foot at level of contralateral knee

Question 3

Rudimentary fingers are called what?

Answer 3

Nubbins

Question 4

Two types of primary bone cancer that can result in amputations

Answer 4

Ewigs sarcoma and Osteosarcoma

Question 5

In osteosarcoma, what part of bone is common site of tumor

Answer 5

Metaphysical portion

Distal femur, prox tib, and prox humerus most common site

Question 6

Common sites of Ewigs sarcoma tumor (5)

Answer 6

Pelvis
Ribs
Femur
Tibia
Humerus

Question 7

What age range is peak time for primary bone cancer incidence

Answer 7

Puberty growth spurt

Peak height velocity?

Question 8

Is osteosarcoma or Ewigs more responsive to radiation.

Answer 8

Ewigs

Question 9

Side effects of of radiation

Answer 9

Devolving tissues 
Mouth sores
Red skin
N/V
Fibrosis of soft tissue 
Growth disturbances 
Fracture and osteoporosis

Question 10

Possible complication of limb amputation in long bones

Answer 10

Spikey bine overgrowth from periosteum at end

Question 11

Common surgery performed in PFFD cases

Answer 11

Rotationplasty

Ankle becomes knee joint

Question 12

Do limb replanting surgeries happen more in UE/LE or and is more successful in proximal/distal limbs.

Answer 12

More common in UE

More successful in distal

Question 13

What does SACH stand for?

Answer 13

Solid Ankle Heel Cushion

Question 14

Pressure in prosthetic knee joint needs to be anterior/posterior to knee to prevent buckle.

Answer 14

Anterior

Question 15

Two functional outcome measures for prosthetics

Answer 15

Child Amputee Prosthetics Project-Functional Status Inventory

Functional Mobility Assessment (6 items)

Question 16

What 2 hip contracture need to be prevented in PFFD and why

Answer 16

Hip flexion and ABD

And to not impede prosthetic use

Question 17

What age do kids with prosthetics get a knee joint?

Answer 17

3 yoa

Question 18

Rule of 5s

Answer 18

Pelvis needs 5 deg movement in all planes to walk

Question 19

What do people need to be able to do before walking in a prosthetic

Answer 19

Don and doff prosthetic

Question 20

Lateral trunk lean when walking with prosthetic can be sign of insignificant strength of what muscle group and tightness of what two muscles?

Answer 20

Contralateral glut weakness

Tight hip flex or ABD

Question 21

Uneven step length in people with prosthetic leg caused by contracture of what 2 muscle groups

Answer 21

Hip flex

Knee flex

Question 22

Lateral thrust cause by weakness of what two muscle groups

Answer 22

Adductors

Quads

Question 23

Lateral whip caused by weakness of what muscle and/or shortened what muscle

Answer 23

Week ADD

Short ABD

Question 24

Increased lumbar lordosis caused by weakness of what muscle group and tightness of what muscles?

Answer 24

Weak TA

Tight hip flex