COMPS:PT Mgmt of Pts w/ Hip and Knee OA--ZENI Flashcards
OA is a ________ process
*NOT just wear and tear
Disease process
Defining Knee OA radiographs
Kellgren Lawrence Scores*
4 Grades
Graded 0 (none)
to
Grade 4 (severe)
Defining Knee OA
Kellgren-Lawrence Scores
Grade 0 (NONE)
- Grade 0== NONE
- definite absence of x-ray changes of OA
Defining Knee OA
Kellgren Lawrence scores
Grade 1 (Doubtful)
- Grade 1 == doubtful
- doubtful jt space narrowing and possible osteophytic lipping
Defining knee OA
Kellgren Lawrence Scores
Grade 2 (minimal)
- Grade 2== minimal
- definite osteophytes and possible jt space narrowing
Defining Knee OA
Kellgren Lawrence Scores
Grade 3 (Moderate)
- Grade 3== moderate
- moderate multiple osteophytes, definite narrowing of jt space and some sclerosis and possible deformity of bone ends
Defining Knee OA
Kellgren Lawrence Scores
Grade 4 (severe)
- Grade 4== severe
- Large osteophytes, marked narrowing of jt space, severe sclerosis and definite deformity of bone ends
Uni or Multi-compartmental disease @ the Knee
- Medial
- Lateral
- Patellofem
SEE pics !!!
Advanced OA Knee
see pics
Defining Knee OA–Clinical Presentation
The Cardinal Signs
Age
Brief AM stiffness
Crepitus
Tenderness
Bony abnorms
NO warmth
Defining Knee OA–clinical present.
ACR Clinical definition
PAIN IN THE KNEE PLUS @ least 3 of the following:
- Pain in the knee + 3 of following:
- >50yo
- <30 mins morning stiff.
- crepitus w/ active motion
- bony tenderness
- bony enlargement
- NO palpable warmth of synovium
NOTE: some studies show that these criteria reflect later stage disease and may not capture indiv’s w/ EARLY or MILD OA****
2 scales common in grading HIP OA
- KL Scale
- Tönnis Classification
see below for Tönnis
In a nutshell….. Tönnis Scale of HIP OA
- 0
- NONE
- 1
- mild
- minor
- No or minor
- 2
- moderate
- moderate
- moderate
- 3
- Severe
- Severe
- Severe
Defining HIP OA—clinical present:
Very high likelihood of Hip OA w/ 4 out of these 5 present:
- Self-reported squatting as an aggravating factor
- Active hip flexion causing LATERAL hip pain
- Scour test w/ ADD. causing lateral hip OR groin pain
- Active hip EXT causing pain
- passive IR of LESS THAN or EQUAL to 25deg
OA is more than just cartilage loss
Jt swelling, bursa inflammation, changes to synovial fluid and jt capsule
see pics
OA is more than just cartilage loss
Mm atrophy, weakness, morphological changes
ex. fat permeating into jt
see pics
OA more than just cartilage loss
Cartilage deterioration (X-ray) and Morphological changes (MRI)
see pics
OA more than just cartilage loss
Osteophytes, thickening of subchondral bone, Bone Marrow lesions (MRI)
see pics
OA cannot _________
CANNOT be considered a disease of ONLY the articular cartilage!!!
Activation Deficit
Prominantly in OA
- Diff AFTER electrical stim vs. what pt can do volitionally
- neurological system cannot fullt activate ALL mm’s in a region
**Quadriceps Lag**
Mvmt patterns and motor control also change
Asymmetrical and abnorm biomechanics
Favoring the Good side
For Knee…
Stiff legged gait pattern
CARDINAL SIGN
Mvmt patterns and motor control also change
Asymmetrical and abnorm biomechanics
Favoring the Good side
The Hip….
Lateral and forward trunk lean TOWARD GOOD SIDE
DECd hip EXT ROM
CARDINAL SIGN HIP OA
Lat. trunk lean w/ walking TOWARDS AFFECTED SIDE
Mvmt patterns and motor control changes
Knee OA
co-contraction vs. muscle timing
INC’D co-contraction
ALTERED mm timing
Alignment changes, Jt Load changes
Knee OA
What is the pattern?
Malalignment==> Altered Loading==>Cartilage Loss==>Malalignment
Valgus vs. Neutral vs. Varus Radiographs
-
More cartilage loss==
- worse alignment becomes
-
Worse alignment becomes==
- more abnormal forces become
-
More abnormal forces become==
- more cartilage is lost
Phys. impairments lead to _________
Functional Deficits
- Ex. OA vs. Control group
- TESTED:
- Age
- KOS-ADLS
- TUG
- SCT
- Quad Strength (Op)
- Nearly 50% reduction in KOS, TUG, SCT and Quad strength
- TESTED:
In a nutshell….
The Cycle
Injury (ACL, fx), Bony deformity, Weakness, Unfortunate genetics ======>
- Joint pain==> Decd phys act==> muscle weakness==> abnormal biomechanics==> cartilage loss and jt laxity==> Joint pain
- Over the span of 5-20 yrs
-
Drs usually say
- ”come back when nothing else works and you can’t take pain anymore”
Primary OA
*usually older pop.
- Disease is of idiopathic origin (no known cause)
- Usually affects mult. joints
- Elderly pop
Secondary OA
*monoarticular
- Monoarticular
- develops as result of defined disorder affecting jt articular surface (ex. trauma) or from abnormalities of joint
Secondary OA
Hip
- Dysplasia
- SCFE
- Fx
- FAI
- Avascular necrosis
Secondary OA
Knee
- Trauma
- chondral lesions
- ACL injury
- Fx’s
Radiographic DOES NOT always match sx’s
Do NOT emphasize structure
Emphasize Function!!
- DO NOT SAY:
- Bone-on-bone
- end-stage
Certain descriptors of OA make pts feel:
- Jt is susceptible to damage
- OA will inevitably get WORSE
- TKA is only option and cond. is irreversible
- Doing more exercise or activity will damage the joint
ALL WRONG!!!
OA is a serious cond. and needs to be approp. mg’d, NOT just put off until TKA
INCd risk of CV disorders, morbidity, mortality
Key Points:
OA Patho.
- OA==more than just a disease of cartilage
- OA is a chronic cond and must be tx as such
- Pts. develop asymmetrical mvmt patterns
- Reduce demand on operated limb and INC reliance on the non-affected side
- Result of pain, weakness, laxity
- which came first???
- Pts w/ hip and knee OA develop behaviors in response to PAIN
Risk factors for OA development and progression
What are some ex’s?
Phys activity and risk
ROM deficits
Muscle control deficits
Dynamic frontal plane alignment
Injury Type vs. Risk of Developing OA compared to an uninjured group
Basically…. based off of previous injury type, what is your risk (likelihood) of developing OA?
see pics
Phys activity and risk for Knee OA
what factors INC risk for OA?
-
Previous injury
- see previous chart
Phys activity and risk for OA
Not all meniscal injuries have same risk!
- Medial extrusion, complex tears, large radial involvement were more common in those who develop OA***
Sports and risk for OA
Sports are generally NOT a risk factor
Exceptions:
- Soccer
- 3.5x INC risk
- Elite lvl long dist running
- 3.3x INC risk
- Competitive wt lifting
- 6.9x INC risk
- Wrestling
- 3.8x INC risk
- For those w/out history of injury– soccer and Am football had INCd risk of OA
Vocation and risk for OA
- Kneeling or squatting
- 2-7x inc risk
- Heavy lifting
- 1.9-7.31x INC risk for Knee
- 2.46x INC risk for Hip
- Dose resp to freq of lifting OR total wt lifted
- Heavy lifting + Kneeling or Squatting
- 2.4 lifting alone, 3.4 w/ kneeling or squatting
Risk Factors for Hip OA
Modifiable
vs.
Structural or Congenital
see pics
Recreational risk factors for Hip OA
sports: Am football, track and field, racket sports
may INC RISK
Rec. risk factors for Hip OA
Freq stair climbing
May INC RISK
Rec. risk factors for Hip OA
Recreational running
DOES NOT INC RISK
REC. risk factors for Hip OA
Walking in lieu of running
DOES NOT DECREASE RISK
REC. risk factors for Hip OA
Leisure cycling or walking
DOES NOT INCREASE RISK
GREATEST modifiable risk factor for OA ====
BMI
BMI
Greatest modifiable risk factor for OA
sytemic inflammatory response also affecting joints
- INCs risk for hand, hip, knee OA
-
Knee OA has greatest assoc w/ obesity
- Overwt== 2x risk of healthy wt indiv.
- Grade 1 obesity== 3.1x risk
- Grade 2 obesity== 4.7x risk
-
Knee OA has greatest assoc w/ obesity
BMI and OA
greatest modifiable risk factor
Losing wt has protective bennies of OA
- Losing 5% of bw reduced risk of knee OA progress. by 50% in women