Arthroplasty Flashcards Preview

Ortho Boards > Arthroplasty > Flashcards

Flashcards in Arthroplasty Deck (36):
1

Soft tissue releases in a valgus knee

Flexion - popliteus
Extension - IT band
Both - LCL

2

Soft tissue releases in varus knee

tibial osteophyte removal
deep MCL
posteromedial corner
attachment of the semimembranosus
partial superficial MCL

3

Risks of HO following TKA

male
trauma
obesity
increased osteophyte formation

4

Initial implant for a charcot knee

hinged

5

polyethylene wear rates associated with loosening

0.1 mm per year

6

common complication in patients with sickle cell undergoing THA

femoral canal perforation

7

what effect does TKA have on your golf game

improves your handicap

8

position for hip arthrodesis

5deg ER
0 deg Add
20 degrees flexion

9

number one reason for failure of low friction charnley

acetabular failure

10

what is the only advantage to a smaller incision for THA

cosmesis

11

Risk factors for sciatic nerve palsy

DDH
female
revision
limb lengthening
post traumatic OA
surgeon self-rating the procedure

12

cell involved in metal on metal debris

lymphocytes

13

drains are associated with

increased risk of transfusion

14

AAOS bone loss acetabulum

1 - segmental
2 - cavitary
3 - both
4 - seperation between superior and inferior acetab
5 - arthrodesis

15

groin pain following THA

psoas tendonistis

cortisone injection
release if normal component
revise acetabular component

16

risk factors for HO THA

prolonged surgery
soft tissue handling
male
heterotrophic OA

need to wait 6 months following procedure to do resection

17

best predictor of transfusion post-op

low HgB

18

indications for revision MOM

component loosing
progressive osteolysis
large effusion
pseudotumor
unremitting pain

19

risk factors for dislocation following THA

female
AVN
fracture treated with tHA
inflammatory OA
> 70yo

20

indications for PS

patellectomy
PCL gone
inflammatory OA

easier to balance
more ROM
easier exposure

21

advantage of mobile bearing

in theory reduces strain on polyethelene

22

difficulty with posterior referencing in a valgus knee

internal rotation of the femoral component

23

what will lead to increased Q angle

internal rotation of the femur
internal rotation of the tibia
lateralizaiton of the patella
medialization of the femur
medialization of the tibia

24

where should you center your tibial component

over the medial 2/3 of the tubercle

25

normal angles of the knee

distal femur - 6 deg valgus
tibia - 3 deg varus
posterior condyles - 3 deg IR

need to neutralize all these angles when you do your cuts
6 deg off femru
3 deg off tibia
3 deg ER from posterior condyles (be careful of hypoplastic lateral condyle in vaglus knee)

26

benefits of UKA compared to osteotomy

faster rehabilitation and quicker recovery
improved cosmesis
higher initial success rate
fewer short-term complications
lasts longer
easier to convert to a TKA

27

complications of UKA

stress fracture - high level of activity
tibial compoenent loosening - will see on XR

28

compare lateral UKA to medial UKA

the same

29

factors associated with elevated metal ion levels in MOM

cup abduction > 55
small femoral head

30

Strong AAOS recommendations for arthritis of hip or knee

weight loss
physical activity
NSAIDS
tramadol

31

what form of wear is most important in osteolysis

adhesive wear

32

main determinant in the number of particles created

volumetric wear
related to the size of the head - increased head is increased wear

33

factors increasing POLY wear

un-cross linked
thickness

34

compare wear properties

poly - > 0.1 is associated with osteolysis, macrophage
ceramic - best wear, stripe wear
Metal - smaller particles, lower than poly, lymphocytes

35

risk factors for supracondylar periprosthetic fractures

Rheumatoid arthritis
Parkinson's disease
chronic steroid therapy
osteopenia
female gender

36

risk of tibial periprosthetic fractures

prior tibial tubercle osteotomy
component loosening
component malposition
insertion of long-stemmed tibial components