MSK Flashcards
risk factors for DDH
girls
breech
multiple pregnancy
oligohydramnios
1st degree FH
1st born
spina bifida
fixed foot deformities
presentation of DDH at new born
newborn screening - Barlows and ortolani
leg length discrepancy
limitation of abduction < 60 degrees
left hip more common
presentation fo DDH older children
- affected leg shorter than other
- waddling gait or tip toe walking
- limitation of hip abduction
- Galeazzi sign - femoral shortening when hips flexed
investigations for DDH
USS hip within 6 weeks if < 4 months old (should be 38-40 corrected gestational age)
if present over >4 months old -> x ray hip
management of DDH
- splinting using Pavlik harness, fit if less than 6 weeks old for 6 weeks then wean for 6 weeks
- if late diagnosis , surgical reduction >6 months
complications of pavlik harness
avascular necrosis of femoral head
accessory nerve palsies
irreducible hip dislocation
definition of JIA
joint inflammation in under 16 y/o for longer than 6 weeks with no other cause found
describe systemic JIA
fever, salmon pink rash with the fever, symmetrical joint pain, hepatosplenomegaly
describe oligoarticular arthritis
MOST COMMON FORM - < 6 y/o, girls
involves < 4 joints (usually lower limb)
uveitis common with ANA +VE (can be asymptomatic and present before joint pain)
describe polyarticular arthritis
> 5 joints involved (smaller joints)
if RF +ve, predicts poorer disease
describe enthesitis arthritis
arthritis plus:
1. sacro-iliac / lumbrosacral pain
2. heel pain
3. acute anterior uveitis
4. lower limbs
HLA-B27 usually +ve
describe juvenile psoriatic arthritis
affects small and large joints asymmetrically
dactylitis
nail pitting
oncholytis
diagnosis of JIA
- raised ESR
- USS - joint fluid and synovial hypertrophy
- ANA +VE in polyarticular, oligoarticular and psoriatic - most important test to predict for blindness
- RF +ve in polyarticular
management of JIA
- physiotherapy
- pain relief
- exercise
- NSAIDs
- steroids (intra-articular 1st line for oligoarticular JIA)
- methotrexate
- biologics
cause of septic arthritis
- staph aureus *
- group A strep
- haemophilus
presentation of septic arthritis
red hot painful swollen joint - usually knee or hip
restricted movement/ non weight bearing
fever
investigations of septic artrhitis
- bloods - raised WCC, raised ESR/CRP, cultures
- joint aspiration for culture
- x ray - widened joint space
management of septic arthritis
- IV antibiotics (cefuroxime) for 4-6 weeks IV
- pain control
cause of osteomyelitis in neonates
group B strep
staph aureus
e.coli
cause of osteomyelitis in children
staph aureus
strep pneumoniae
H.influezna
K.kingae (chronic)
cause of osteomyelitis in children with sickle cell disease
salmonella
affects diaphysis
location of osteomyelitis in neonates vs children
neonates - femur or humerus + destruction of growth plates
children- long bone metaphysis (distal femur)
presentation of osteomyelitis
ACUTE - fever, unwell, limp, red swollen painful limb, limited movement within 1 week
CHRONIC - months of infection, unusual organism (mycobacteria), brodies abscess deep in bone of metaphysis and deep boring pain
diagnosis of osteomyelitis
MRI ** - detects early changes
X ray - late changes
periosteal elevation, radiolucent metaphyseal lesions
Bloods - high WCC, high CRP, high ESR, culture
describe slipper capital femoral epiphysis
displacement or slipping of the proximal femoral epiphysis at the neck
defect in hypertrophic zone on growth plate
risk factors for slipper capital femoral epiphysis
- BOYS and OBESITY
- trauma
- hypothyroidism, hypopituitarism, vit d deficiency, short stature
- contralateral SCFE
presentation of SCFE
pain in hip , groin, medial thigh on walking
limp
limited internal rotation and abduction
Drehmanns sign - external hip rotation