(9) Paeds Msk Flashcards
What factors influences a child evolution?
- genetics
- physical trauma
- nutrition
- socioeconomic factors
Where do greenstick fractures usually occur?
metaphysis
Where do buckle fractures usually occur?
diaphysis
How do bones fail first in children after trauma?
- during rapid growth, bone lengthens before muscle and tendon can stretch sufficiently
- ligaments are strong so bone fails first
What is the weakest part in the growing bone?
Epiphysis (growth plate)
What is the salter harris classification?
system to categorize fractures the physis, or growth plate in children
What are avulsion fractures?
severe ligamentous injury unlikely to occur by itself in children
Where do Apophyseal avulsion fractures occur?
at all main apophyses usually as a result of forceful eccentric/concentric contraction of the attached muscle
What is osteochondrosis?
- Group of conditions characterized by sclerosis and fragmentation of the epiphysis or apophysis in the immature skeleton
- focal disturbance of endochondral ossification
What can happen as a result of osteochondrosis?
- interruption to the blood supply
- necrosis of the ossification centre
- Bony regrowth
What is a Slipped Capital Femoral Epiphysis?
Displacement of the upper femoral epiphysis on the metaphysis
What are the causes of a Slipped Capital Femoral Epiphysis?
- increased stress across physis
- possible hormonal contribution
- underlying endocrine abnormality
- renal failure
What are the signs of a SCFE?
- hip/groin pain
- if chronic, may be thigh or knee pain
- Limp
- unable WB (acute slips)
What is Perthes (aka Legg-Calve-Perthes disease)?
idiopathic juvenile avascular necrosis of femoral head
What may cause an LCPD?
- SCFE
- trauma
- steroid use
- congenital dislocation of hip
What is the pathophysiology of an LCPD?
- fragmentation
- revascularization
- remodeling
- whole process may take 3-4 years
What are symptoms of LCPD?
- painful limp
- pain referred to groin, thigh or knee
What are signs of LCPD?
- Loss of medial rotation
- Loss abduction
- Flexion adduction contracture
- Trendelenburg gait