Paeds MSK Flashcards
What are the most common causes of fracture in a neonate?
Clavicle: from shoulder dystocia
Humerus/ femur: from breech delivery
What is the prognosis for neonatal fracture?
Great
How old does a child have to be prescribed codeine and morphine?
16
How should paediatric fractures be managed?
Pain management
Manipulation and reduction
How old does a child need to be to get a intramedullary nail?
4
What is the Ottawa ankle rule?
X ray only indicated if:
- Pain in the malleolar zone AND bone tenderness at the posterior edge/ tip of the lateral malleolus OR
- Pain in the malleolar zone AND bone tenderness at the posterior edge/ tip of the MEDIAL malleolus OR
- An inability to bear weight both immediately and in the emergency department for four steps
What is the Ottawa knee rule?
X ray only indicated if: age 55+ OR isolated patellar tenderness OR cannot flex to 90 degrees OR an inability to bear weight both immediately + in the ED for 4 steps
What is Perthe’s disease?
Avascular necrosis of the femoral epiphysis from an interruption of blood supply, followed by re-vascularisation + re-ossification over 18-36 months
In which age group/ gender is Perthe’s most common?
4-8 y/o boys
Recall the signs and symptoms of Perthe’s
Insidious presentation: limp, knee pain, hip pain –> limb shortening
What investigations should be done for Perthes?
X ray +/- MRI
Roll test
What would an x ray show in Perthe’s disease?
Increased density of femoral head
What is the roll test?
Patient supine, roll affected hip internally + externally –> guarding or spasm in Perthe’s
How is Perthe’s managed?
Simple analgesia for pain management<6 years: observation: non-surgical containment using splints>6 years –> surgery
What is Osgood Shlatter Disease?
Osteochondritis (inflammation of the cartilage/ bone) of the patellar tendon insertion at the knee
Recall the most at-risk group for OSD?
10-15y who are physically active
Recall the signs and symptoms of OSD?
Gradual onset knee pain after exercise that is relieved by rest
Localised tenderness + swelling over tibial tuberosity
Hamstring tightness
What might be seen on X ray in OSD?
Fragmentation of the tibial tubercle + overlying soft tissue swelling
How should OSD be managed?
Simple analgesic packs (intermittent)
Protective knee pads
Stretching
Reassure - this will resolve over time, but may persist until end of growth spurt
Advise stopping/ reducing all sporting activity
What is chondromalacia patellae?
Anterior knee pain from degeneration of articular cartilage on posterior surface of patella
What is the general cause of chondromalacia patellae?
Overuse in physical activity
Recall the signs and symptoms of chondromalacia patellae
Anterior knee pain: exacerbated by movement –> painless passive movement but pain + grating sensation on repeated extension
How should chondromalacia patellae be managed?
Physio
What is osteochondritis dissecans?
Reduced blood flow causing cracks to form in the articular cartilage and subchondral bone –> avascular necrosis –> fragmentation of bone and cartilage with free movement of fragments –> activity related joint pain
Recall the signs and symptoms of osteochondritis dissecans?
Pain after exercise - catching, locking and giving way
What is osteomyelitis?
Infection of metaphysis of long bones, commonly the distal femur and proximal tibia
What is the most common pathogen implicated in osteomyelitis?
Staph aureus
What is the most common age group affected by osteomyelitis?
<5 years
How does the presentation of osteomyelitis compare to the presentation of septic arthritis?
Usually chronic in onset and less severe than septic arthritis (over a week rather than a day)
Recall the signs and symptoms of osteomyelitis?
Fever
Acute onset limb pain, immobile limb, skin swollen, tender and erythematous
What investigations should be done for suspected osteomyelitis?
Septic screen
BCs + FBC
Joint aspiration and MC+S
XR –> MRI of joint (shows soft tissue)
How should acute osteomyelitis be managed?
High dose IV empirical- narrow spec Abx
1st line is flucloxacillin
Take BCs before staring IV Abx
Change to oral Abx as soon as CRP is back to normal
Surgical debridement may be necessary
What is septic arthritis?
Infectious arthritis of the synovial joint (vs osteomyelitis of bone)
Which joint is affected in 75% of cases of septic arthritis?
Hip
What is the usual pathogen implicated in septic arthritis?
S aureus