2. one of the most commonly injuredone of the most commonly injured
jointsjoints
lack of bony and muscular supportlack of bony and muscular support
positioned between the 2 longestpositioned between the 2 longest
bonesbones
weight bearing and locomotionweight bearing and locomotion
functionsfunctions
5. 1. Anterior cruciate ligament (ACL)1. Anterior cruciate ligament (ACL)
injuryinjury
Most are non-contactMost are non-contact
injury, 2injury, 2° to° to
deceleration forces ordeceleration forces or
hyperextensionhyperextension
Planted foot & sharplyPlanted foot & sharply
rotatingrotating
If 2° to contact, mayIf 2° to contact, may
have associated injuryhave associated injury
(MCL, meniscus)(MCL, meniscus)
6.
7.
8. FemalesFemales playingplaying soccersoccer,, gymnasticsgymnastics andand
basketballbasketball are at highest riskare at highest risk
Risk of injuryRisk of injury 2 – 8 times2 – 8 times in women↑ in women↑
~250,000 injuries/year in general population~250,000 injuries/year in general population
Gender difference not clearGender difference not clear
Joint laxity, limb alignmentJoint laxity, limb alignment
Neuromuscular activationNeuromuscular activation
9. HxHx::
Hearing or feeling a “pop” & knee gives wayHearing or feeling a “pop” & knee gives way
Significant swelling quickly (< 1 hour)Significant swelling quickly (< 1 hour)
UnstableUnstable
↓↓ range of motion (ROM)range of motion (ROM)
Achy, sharp pain with movementAchy, sharp pain with movement
13. TreatmentTreatment::
RICERICE
Hinged knee braceHinged knee brace
CrutchesCrutches
Pain medicationPain medication
RehabilitationRehabilitation
Avoid most activitiesAvoid most activities
(stationary bike o.k.)(stationary bike o.k.)
Surgery (in most cases)Surgery (in most cases)
RICERICE
•RESTREST: reduce/stop using injured: reduce/stop using injured
area for at least 48hrs. If you havearea for at least 48hrs. If you have
leg injury, you may need to stay offleg injury, you may need to stay off
of it completely.of it completely.
•ICEICE: put an ice pack on the injured: put an ice pack on the injured
area for 20 min at a time, 4-8× a day.area for 20 min at a time, 4-8× a day.
•COMPRESSIONCOMPRESSION: compression of: compression of
an injured ankle may help to reducean injured ankle may help to reduce
swelling. These include bandagesswelling. These include bandages
such as elastic wraps or splints.such as elastic wraps or splints.
•ELEVATIONELEVATION: keep the injured: keep the injured
area elevated above the level of thearea elevated above the level of the
heart.heart.
14. PrognosisPrognosis::
Usually an isolated injuryUsually an isolated injury
Post-op: 8-12 months until full activityPost-op: 8-12 months until full activity
ReferralReferral::
Almost all young, athletic patients will preferAlmost all young, athletic patients will prefer
surgical reconstructionsurgical reconstruction
?Increased risk of DJD if not treated?Increased risk of DJD if not treated
Can still get DJD if reconstructedCan still get DJD if reconstructed
15. Posterior cruciate ligamentPosterior cruciate ligament
(PCL)injury(PCL)injury
MxnMxn::
hyperflexionhyperflexion
falling on bent knee with foot plantar flexedfalling on bent knee with foot plantar flexed
Hit on fixed anterior tibiaHit on fixed anterior tibia
S/S:S/S:
““pop” at the back of kneepop” at the back of knee
swelling in popliteal fossaswelling in popliteal fossa
+ posterior sag test, +sunrise test, + posterior+ posterior sag test, +sunrise test, + posterior
drawer testdrawer test
20. 3. Medial Collateral ligament (MCL)3. Medial Collateral ligament (MCL)
InjuryInjury
Important in resistingImportant in resisting
valgus movementvalgus movement
Common in contactCommon in contact
sports, i.e. football,sports, i.e. football,
soccersoccer
Hit on outside of kneeHit on outside of knee
while foot plantedwhile foot planted
Associated injuriesAssociated injuries
common, depending oncommon, depending on
severityseverity
21. HxHx::
Immediate pain over medial kneeImmediate pain over medial knee
Worse with flexion/extension of kneeWorse with flexion/extension of knee
Pain may be constant or present withPain may be constant or present with
movement onlymovement only
Knee feels ‘unstable’Knee feels ‘unstable’
Soft tissue swelling, bruisingSoft tissue swelling, bruising
22. PEPE::
no effusionno effusion
medial swellingmedial swelling
pain with flexionpain with flexion
tender over medialtender over medial
femoral condyle,femoral condyle,
proximal tibiaproximal tibia
Valgus stress at 0Valgus stress at 0° &° &
30° PAIN, possible→30° PAIN, possible→
laxitylaxity
23. ImagingImaging::
obtain radiographs to r/o fractureobtain radiographs to r/o fracture
MRI if other structures involved or if unsure ofMRI if other structures involved or if unsure of
diagnosisdiagnosis
24. TreatmentTreatment: Grade I: Grade I no laxity @ 0°or 30°→no laxity @ 0°or 30°→
Grade IIGrade II no laxity @ 0°,but→no laxity @ 0°,but→
lax @ 30°lax @ 30°
RICERICE
Hinged-knee brace (Grade II)Hinged-knee brace (Grade II)
CrutchesCrutches
Aggressive rehabilitationAggressive rehabilitation
NSAIDsNSAIDs
Treatment:Treatment: Grade IIIGrade III lax @ 0° & 30°→ lax @ 0° & 30°→
Same as aboveSame as above
Consider Orthopedic referralConsider Orthopedic referral
25. PrognosisPrognosis::
Grade I -- 10 daysGrade I -- 10 days
Grade II -- 3-4 weeksGrade II -- 3-4 weeks
Grade III -- 6-8 weeksGrade III -- 6-8 weeks
When to refer:When to refer:
Other ligamentous injuries (surgical)Other ligamentous injuries (surgical)
Severe MCL injurySevere MCL injury
Not progressing as expectedNot progressing as expected
27. 4. Lateral collateral ligament4. Lateral collateral ligament
(LCL) injury(LCL) injury
MxnMxn::
Varus force to medial aspect of kneeVarus force to medial aspect of knee
internal rotation of tibiainternal rotation of tibia
S/SS/S::
POT over LCL,POT over LCL,
pain,pain,
swelling,swelling,
loss of motion,loss of motion,
““+” varus stress at 30 degrees—solid endpoint with 1+” varus stress at 30 degrees—solid endpoint with 1stst
degree, lessdegree, less
stability but solid endpoint with 2stability but solid endpoint with 2ndnd
degree, no endpoint with 3degree, no endpoint with 3rdrd
degreedegree
if “+” varus stress at 0 degrees flexion suspect ACL or PCL injury asif “+” varus stress at 0 degrees flexion suspect ACL or PCL injury as
wellwell
31. Hx:Hx:
Clicking, catching or lockingClicking, catching or locking
Worse with activityWorse with activity
Tends to be sharp pain at jointTends to be sharp pain at joint
lineline
EffusionEffusion
34. TreatmentTreatment::
RICERICE
Surgical repair orSurgical repair or
excision (arthroscopic)excision (arthroscopic)
CrutchesCrutches
NSAIDsNSAIDs
Knee sleeveKnee sleeve
Asymptomatic tears doAsymptomatic tears do
not require treatmentnot require treatment
35. PrognosisPrognosis::
Results of surgical repair/excision areResults of surgical repair/excision are
very goodvery good
Return to full activities 2-4 months afterReturn to full activities 2-4 months after
surgery; tends to be quicker for athletessurgery; tends to be quicker for athletes
When to refer:When to refer:
Most symptomatic meniscal injuriesMost symptomatic meniscal injuries
require surgeryrequire surgery
36. 7. Patellar7. Patellar
dislocation/instabilitydislocation/instability
Patella may dislocate or sublux laterallyPatella may dislocate or sublux laterally
Young, active patients at highest risk (~agesYoung, active patients at highest risk (~ages
13-20)13-20)
Common in football & basketballCommon in football & basketball
♀♀ > ♂> ♂
Recurrence is common, especially if firstRecurrence is common, especially if first
dislocation < 15 yodislocation < 15 yo
37. Indirect traumaIndirect trauma
most commonmost common
mechanismmechanism
Strong quadStrong quad
contraction while legcontraction while leg
is in valgus and footis in valgus and foot
plantedplanted
Other knee ligamentOther knee ligament
injuries can occurinjuries can occur
39. Hx:Hx:
Feel a ‘pop’ and immediate painFeel a ‘pop’ and immediate pain
Obvious knee deformityObvious knee deformity
Painful, difficult to bend kneePainful, difficult to bend knee
May spontaneously relocate, leftMay spontaneously relocate, left
with feelings of instabilitywith feelings of instability
42. ImagingImaging::
Standard knee x-Standard knee x-
rays a good startrays a good start
Likely need an MRILikely need an MRI
if injury seemsif injury seems
significant orsignificant or
associated injuriesassociated injuries
seem possibleseem possible
MRI
44. PrognosisPrognosis
Recurrent instability is common, butRecurrent instability is common, but
rehab is mainstay and very usefulrehab is mainstay and very useful
When to referWhen to refer
Associated fractureAssociated fracture
Poor response to rehabPoor response to rehab
Multiple dislocations (#?) & skill levelMultiple dislocations (#?) & skill level
45. Patella fracturePatella fracture
MxnMxn::
direct impact or trauma to patelladirect impact or trauma to patella
Indirect trauma in which a severe pull of the patellar tendon occursIndirect trauma in which a severe pull of the patellar tendon occurs
against the femur when the knee if semi-flexedagainst the femur when the knee if semi-flexed
S/SS/S::
hemorrhage which results in significant swellinghemorrhage which results in significant swelling
painpain
POT over PatellaPOT over Patella
extreme pain with weight bearing/movementextreme pain with weight bearing/movement
49. 1. Iliotibial band tendonitis1. Iliotibial band tendonitis
Excessive frictionExcessive friction
between iliotibial bandbetween iliotibial band
(ITB) & lateral femoral(ITB) & lateral femoral
condylecondyle
50. Iliotibial band tendonitis
Common in runnersCommon in runners
and cyclistsand cyclists
foot pronation, genufoot pronation, genu
varum are riskvarum are risk
factorsfactors
51. HxHx::
Pain at lateral kneePain at lateral knee
At first, sxs only after a certainAt first, sxs only after a certain
period of activityperiod of activity
Progresses to pain immediatelyProgresses to pain immediately
with activitywith activity
52. PE:PE:
Tender at lateralTender at lateral
femoralfemoral
epicondyle, ~3cmepicondyle, ~3cm
proximal to jointproximal to joint
lineline
Soft tissueSoft tissue
swelling & crepitusswelling & crepitus
No joint effusionNo joint effusion
55. Iliotibial band tendonitis
Prognosis:Prognosis:
Improves with restImproves with rest
Expect long recovery timeExpect long recovery time
When to refer:When to refer:
Intractable painIntractable pain
Surgery = releaseSurgery = release
56. 2. Popliteus tendinitis2. Popliteus tendinitis
surrounds posterolateral aspect ofsurrounds posterolateral aspect of
knee, stabilizer in flexion by resistingknee, stabilizer in flexion by resisting
forward displacement of the femur onforward displacement of the femur on
the tibiathe tibia
less common but same causes as itbless common but same causes as itb
(d/d)(d/d)
57. discomfort on anterior or superiordiscomfort on anterior or superior
lat.collateral ligament and withlat.collateral ligament and with
resisted knee flexion with tibia held inresisted knee flexion with tibia held in
external rotationexternal rotation
- treatment: reduction training- treatment: reduction training
distance, NSAIDS, stretching kneedistance, NSAIDS, stretching knee
flexors, electrotherapy. corticosteroidflexors, electrotherapy. corticosteroid
injectioninjection
58. 3. Patellofemoral pain3. Patellofemoral pain
syndromesyndrome
Retropatellar orRetropatellar or
peripatellar painperipatellar pain
resulting from physicalresulting from physical
or biomechanicalor biomechanical
changes in thechanges in the
patellofemoral jointpatellofemoral joint
Many forces interact toMany forces interact to
keep the patella alignedkeep the patella aligned
59. Patellofemoral pain syndrome
Patella not onlyPatella not only
moves up and down,moves up and down,
but rotates and tiltsbut rotates and tilts
Many points ofMany points of
contact betweencontact between
patella and femoralpatella and femoral
structuresstructures
60. Patellofemoral pain syndrome
Hx:Hx:
Vague anterior knee pain with insidious onsetVague anterior knee pain with insidious onset
Common cause of anterior knee pain in womenCommon cause of anterior knee pain in women
Tend to point to front of knee when asked toTend to point to front of knee when asked to
localize painlocalize pain
Worse with certain activities, i.e. ascending orWorse with certain activities, i.e. ascending or
descending hills & stairsdescending hills & stairs
Pain with prolonged sittingPain with prolonged sitting theater sign→ theater sign→
No meniscal or ligamentous sxsNo meniscal or ligamentous sxs
61. Patellofemoral pain syndrome
PE:PE:
Positive compression testPositive compression test
Patellar crepitus with ROMPatellar crepitus with ROM
Mild effusion possibleMild effusion possible
May see tenderness withMay see tenderness with
patella facet palpationpatella facet palpation →→
medial, lateral, superior,medial, lateral, superior,
inferiorinferior
Remainder of knee examRemainder of knee exam
unremarkableunremarkable
63. Patellofemoral pain syndrome
PE:PE:
Check for flat feet (pes planus) or high-arch feet (pesCheck for flat feet (pes planus) or high-arch feet (pes
cavus)cavus)
Pes Planus Pes Cavus
64. Patellofemoral pain syndrome
PE:PE:
Check heel cord (achilles) flexibilityCheck heel cord (achilles) flexibility
Check for a tight iliotibial band (ober’s test)Check for a tight iliotibial band (ober’s test)
Ober’s test
Achilles stretch
66. Patellofemoral pain syndrome
Tx:Tx:
Relative rest/ModificationRelative rest/Modification
of activitiesof activities
IcingIcing
NSAIDSNSAIDS
Patellar bracesPatellar braces
Addressing foot problemsAddressing foot problems
with foot wear andwith foot wear and
orthoticsorthotics
SurgerySurgery
67. 4. Patellofemoral synovial4. Patellofemoral synovial
plicaplica
- REMNANTS OF THE SEPTA OF EMBRYONIC JOINT. USUALLY
PRESENT BUT ASYMPTOMATIC
- SYMTOMATIC PLICA: MEDIAL PATELLAR PLICA RUNS FROM
SUPRAPATELLAR POUCH TO THE INFRAPATELLAR FAT PAD
MAY IMPINGE OF THE MEDIAL FEMORAL CONDYLE AND PFJ
IN FLEXION
68. 4) PF SYNOVIAL PLICA
- ACHING ON SITTING DOWN ANTERIORLY, INTENSE THE
FIRST WALKING STEPS IN THE MORNING
O/E: FELT BANDS, MEDIALLY, MILD EFFUSION, PAIN ON
RESISTED KNEE EXTENSION MADE WORSE BY GLIDING
PATELLA MEDIALLY
- TREATMENT: REST, NSAIDS, CORTICOSTEROID INJECTION IF
MEDIAL PLICA PALPABLE. ARTHRO. EXCISION
69. 5. Infrapatellar fat pad5. Infrapatellar fat pad
syndromesyndrome
repetitive hyperextention injuries,repetitive hyperextention injuries,
surgical interventionsurgical intervention
pain on hyperextention over anteriorpain on hyperextention over anterior
knee regionknee region
part of patella baja: shorter patellarpart of patella baja: shorter patellar
tendon from fibrosis (? previoustendon from fibrosis (? previous
surgery) blocking knee flexionsurgery) blocking knee flexion
70. 5) INFRAPATELLAR FAT PAD SYNDROME
treatment:treatment:
rest from hyperextention (martial arts )rest from hyperextention (martial arts )
, NSAIDS, electrotherapy., NSAIDS, electrotherapy.
significant fibrosis: arthroscopicsignificant fibrosis: arthroscopic
excisionexcision
71. 6. Patellar tendonitis6. Patellar tendonitis
Also called “jumper’s knee”Also called “jumper’s knee”
Mxn:Mxn:
excessive running, jumping or kicking causing extremeexcessive running, jumping or kicking causing extreme
tension of the knee extensor muscle complextension of the knee extensor muscle complex
S/S:S/S:
Pain at the patellar tendonPain at the patellar tendon
POT over the distal pole of patellaPOT over the distal pole of patella
Pain increases with activityPain increases with activity
Thickening of tendonThickening of tendon
crepituscrepitus
73. 7. Bursitis7. Bursitis
Can be acute, chronic, orCan be acute, chronic, or
recurrentrecurrent
Numerous bursae involved butNumerous bursae involved but
most commonly injured are themost commonly injured are the
prepatellar or the deepprepatellar or the deep
infrapatellarinfrapatellar
74. Bursitis
Mxn:Mxn:
falling directly on kneefalling directly on knee
Continuous kneelingContinuous kneeling
Overuse of patellar tendonOveruse of patellar tendon
75. Bursitis
S/S:S/S:
Localized swelling that is similarLocalized swelling that is similar
to a water balloon and is outsideto a water balloon and is outside
the knee jointthe knee joint
Pain especially with pressurePain especially with pressure
79. Vascular InjuryVascular Injury
~20% (5-30%) of all~20% (5-30%) of all
dislocationsdislocations
EMERGENCY if NO distalEMERGENCY if NO distal
perfusionperfusion
Patterns of Vascular injuryPatterns of Vascular injury
• rupturerupture
• incomplete tearincomplete tear
• intimal injury (may causeintimal injury (may cause
thrombosis)thrombosis)
80. Neurologic InjuryNeurologic Injury
CommonCommon peroneal nerveperoneal nerve
palsypalsy
Incidence ~20% (10-40%)Incidence ~20% (10-40%)
Most Common with varusMost Common with varus
injuryinjury
PROGNOSIS is POORPROGNOSIS is POOR
Complete recovery ~ 20%Complete recovery ~ 20%