B3 MSK Flashcards

1
Q

Coxa Vara

A

Decreased angle of inclination, les than 120
Short leg, limp, waddle
Increase stress femoral neck

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2
Q

Coxa Valga

A

Angle inclination increased, above 135
Intwbility, abnormal gait, predispose dislocate
Reduce adductor muscle effective

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3
Q

Strongest ligament body

A

iliofemoral (y shape)
Resist hyper extension
Upper lateral restrict excess external rotation and adduction
Frontal medial restriction extension and internal rotation
From AIIS

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4
Q

Weakest hip ligament

A

Ischiofemoral ligament
Posterior reinforce
Attach acetabular rim to femoral neck and greater trochanter

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5
Q

Hip dislocation

A

90% posterior
Acetabulum deeper anterior
Ischiofemoral (posterior) weakest ligament
Limp shorter, flexed, adducted, medial rotate

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6
Q

Posterior hip dislocation X-ray

A

Head superolateral to scetabulum
May seem smaller

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7
Q

Anterior hip dislocation zray

A

Inferior head
Seem larger
Limb flex, abduct. Lateral rotation

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8
Q

Blood supply head/neck femur

A

Medial circumflex artery
Often torn or lead to necrosis
Head femur get acetabular branch

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9
Q

Blood supply head/neck femur children

A

Obturator artery posterior branch give acetabular branch

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10
Q

Femoral neck fracture

A

Mostly from osteoporosis
10% die in month, 33% die in year
Typically cause upward displacement due to glute muscles

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11
Q

Femoral a vascular necrosis

A

Bone tissue dies
Retinacular arteries upply femoral head easy damage
Especially if surgery delayed or displaced

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12
Q

Extracapsular fracture

A

Easy unite
Rare cause a vascular necrosis

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13
Q

Tibias fracture

A

Most common middle & inferior shaft
Poor blood supply
Compound fracture common with high energy trauma

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14
Q

Stress fracture tibia

A

Very common long hikes without conditioning

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15
Q

Diagonal tibial fracture

A

Severe torsion in skiing most common
Limb shortening
High speed forward fall over boot
Call boot top fracture

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16
Q

Q angle

A

ASIS to patella & middle patella to head femur
Greater in women
Normal around 10 degree

17
Q

Genu varus

A

Bow leg
Weight bear medial knee\lol over stress
Smaller Q angle

18
Q

Genu valgus

A

Knock knee
Weight bear lateral
Mcl over stretch, excess stretch lateral meniscus & cartilage lateral femoral and tibial condyle
Particular even more lateral with extension
Larger Q angle

19
Q

Patella femoral dysfunction

A

Common call runner knee
Overuse
Direct trauma
Osteoarthritis
Weak vastus medialis
Tight Vastus lateralis or It band
Increasing Q angle can cause

20
Q

Housemaid knee

A

Inflammation of prepatellar bursae
Repeat kneel or trauma front knee

21
Q

Clergyman knee

A

Inflammation of deep infrapatellar bursae
Pain and swelling below kneecap

22
Q

Baker cyst

A

In politesl fossa
Synovial effusion between semimembranosis and medial head gastroc
Common kids but no issues
Large in adults, rheumatoid arthritis, osteoarthritis or injury

23
Q

Most common knee injury

A

Ligament sprain
ACL hyper extension
PCL land tibial tuberosity with knees flex

24
Q

High ankle sprain

A

Involves syndesmosis between tibia and fibula

25
Q

Maizonneuve fracture

A

Spiral fracture of proximal tibia & unstable ankle injury
Often disrupt distal talofibular syndesmosis & fracture medial malleolous

26
Q

4 parts of deltoid ligament

A

Tibionavicular
Tibiocalcaneum
Posterior tibiotalar
Anterior tibiotalar

27
Q

Injury deltoid ligament

A

Super strong ligament
Prevent excess eversion & subluxation
Often scullion fracture of medial malleolous rather than ligament tear

28
Q

Posterior talofibular ligament (lateral significance)

A

Strongest of lateral ligaments
Rarely isolated injury

29
Q

Significance plantar calcaneonavicular (spring) ligament

A

Medial longitudinal arch support
Prevent head of talus downward displace
Smooth weight transfer & propulsion

30
Q

Chopart amputattion

A

Surgery with disarticulation though transverse tarsal joint
Severe trauma/infection forefoot
This joint helps flexibility/adaptability in gait

31
Q

Weight bear in foot

A

50% posterior to calcaneus
50% anterior to metatarsals (mostly 1st)
Arches do shock absorb, store/release energy
Muscles help move & support arches

32
Q

Medial longitudinal arch

A

Highest, more prominent
Primary weight bear
Calcaneus, talus (critical), navicular, 3 cuneiforms, 3 metatarsals
Tibialis posterior & anterior
Fibularis longus tendon

33
Q

Lateral longitudinal arch

A

Much flatter
Rat on ground in standing
Calcaneus, cuboid(key), fourth and fifth metatarsal

34
Q

Transverse arch

A

Across foot
Cuboid, three cuneiforms (intermediate key), base of metatarsals
Medial & longitudinal are pillars
Distribute weight on forefoot for uneven terrain
Passive support by bone
Active support by tendon fibularis longus & tendon tibialis posterior

35
Q

Bunion/hallux valgus

A

Bony protuberance medial first MTP
lateral deviation Hallux
Pain, swell, inflame
Enlarge over time
1st MTP bones out of alignment
Metatarsals medial. Phalanx of hallux lateral
Prolong use narrow heels, osteoporosis, flat feet