disorders of the knee Flashcards

1
Q

femoral shaft traumas

A
  • high velocity trauma
  • proximal fragment is abducted due to glutus medius and minimus
  • distal segement is adducted due to adductor muscles
  • blood loss can develop into a hypovolemic shock

TREATMENT

  • surgery
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2
Q

distal femoral fractures

A
  • sport injury or fall
  • popliteal artery can be damaged
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3
Q

tibal plataeu fractures

A
  • high energy injuries
  • normally affect the lateral tibial condyle
  • can be associated with ACL fractures
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4
Q

patellar fractures

A
  • caused by direct injury
  • cant raise leg in air

TREATMENT

  • surgery
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5
Q

patella dislocation

A
  • completely displaced out of normal position
  • most common is lateral dislocation due to line of pull between the quadricepts tendon and the patella ligament
  • trauma
  • strengthen vastus medialis muscle

TREATMENT

  • extend the knee and manually reducing the patella and need physiotherapy
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6
Q

meniscal injury

A
  • very common
  • intermittent (not continous) pain
  • localised pain
  • swelling is delayed
  • tenderness and pain

TREATMENT

  • acute = surgically
  • chronic = conservative managment
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7
Q

collateral ligament injury

A
  • sporting injury in direct contact sport
  • immediate pain and swelling of knee
  • valgus = MCL at risk of damage
  • varus = LCL at risk
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8
Q

valgus and varus angulation

A
  • valous = various = wide
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9
Q

unhappy triad

A
  • ACL
  • medial meniscus
  • medial collateral ligament

all injured

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10
Q

ACL and PCL injury

A
  • ACL = due to a sudden change in direction (quick deceleration or hypoextension)
  • or large force to the back of the knee
  • immediate swelling
  • PCL = player falls on knee and tibia hits ground first
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11
Q

dislocation of the knee

A
  • 3/4 ligaments must be ruptured (ACL, PCL, MCL, LCL)
  • risk of damaging popliteal artery
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12
Q

swelling around knee

A

due to:

  • bone
  • soft tissue
  • fluid
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13
Q

knee effusion

A
  • accumulation of fluid inside the knee joint
  • can be blood, recative synovitis (increased synovial fluid)

divisions

  1. heamarthrosis = ACL rupture
  2. lipo- haemartrosis = blood and fat in joint and fat can be seen on x ray and appears darker
    3.
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14
Q

pre patella bursitis

A
  • knee pain and swelling and cant walk
  • housmaids knee - tend to lean forwards
    *
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15
Q

infrapatella bursitis

A

clergymans knee

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16
Q

suprapatella bursitis

A

due to:

  • osteoarthritis
  • rheumatoid arthritis
  • infection
17
Q

OSD (osgood - schlatters disease)

A
  • inflammed patella ligament
  • intense knee pain during movement
  • relieved with rest
18
Q

osetoarthritis of knee

A
  • stiffness and swelling
  • deformity of knee joint = valgus
  • loss of articular cartilage
19
Q

septic arthritis in the knee

A
  • invasion of joint space via micro-organisms
  • common = staph.areus, staph.epidermis, strep.pneumoniae, nisseria ghonnorhoea
  • fever, pain, reduced motion

risk factors:

diabetes, immunosupression, prosthetics (biofilm from staph. epidermis can invade)

  • neutrophils stimulate cytokeins = hydrolysis of collagen and proteoglycans
20
Q

where to feel for the femoral pulse

A

halfway between the ASIS and the pubic symphysis