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Systems 2nd Year: MSK > Osteomyelitis (Bone Infection) > Flashcards

Osteomyelitis (Bone Infection) Flashcards

1
Q

Most common type of Osteomyelitis

A

non specific

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2
Q

Acute Osteomyelitis population (4)

A

Children
Boys
History of Minor Trauma

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3
Q

Acute Osteomyelitis source of infection in haematogenous

A

Children and Elderly

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4
Q

Acute Osteomyelitis source of infection possibility (4)

A

Open Fracture
ORIF
Joint Replacement
Vascular insufficiency

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5
Q

Source of osteomyelitis infection in infants

A

infected umbilical cord

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6
Q

source of osteomyelitis infection in children (3)

A

boils
tonsilitis
skin abrasions

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7
Q

source of osteomyelitis infection in adults (2)

A

UTI

Arterial Line

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8
Q

Osteomyelitis organism in infants under 1 year (3)

A

Staph Aureus
Group B Strep
E Coli

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9
Q

Osteomyelitis organism in older children (3)

A

Staph aureus
Strep pyogenes
H influenza

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10
Q

Osteomyelitis organism in adults

A

Staph Aureus

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11
Q

which osteomyelitis organism in those with prostheses (2)

A

coagulase neg staphylocci

propionibacterium spp

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12
Q

In vertebral osteomyelitis organisms (2)

A

s aureus

tb

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13
Q

in sickle cell disease osteomyelitis organism (1)

A

salmonella

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14
Q

which bones can be affected by osteomyelitis (7)

A

long bones metaphysis

  • distal femur
  • prox tibia
  • prox humerus

joints with interarticular metaphysis

  • hip
  • radial elbow
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15
Q

Where does Acute Osteomyelitis start

A

Metaphysis

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16
Q

What stages of Acute Osteomyelitis happen (6)

A

Vascular Stasis (Venous Congestion and Arterial Thrombosis)

Acute Inflammation

Suppuration

Release of Pressure

Necrosis of Bone (Sequestrum)

New Bone formation (involcrum)

17
Q

What is necrosis of bone called

A

sequestrum

18
Q

what is new bone formation called

A

involcrum

19
Q

Acute Osteomyelitis Features in Infant (5)

A 
Fail to Thrive
Drowsy
Metaphyseal Tenderness and Swelling
Decrease ROM
Common Around Knee
20
Q

Where is Acute Osteomyelitis in Infant Common

A

Knee

21
Q

Acute Osteomyelitis in Children Features (7)

A 
Severe Pain
Reluctant to Move
Joints Held Flexed
Swinging Pyrexia
Tachycardia
Malaise 
Toxaemia
22
Q

Acute Osteomyelitis Adult Features (4)

A

Common in Thoracocolumbar Spine
Backache
History of UTI or Urological Procedure
Elderly

23
Q

Acute Osteomyelitis common where

A

Thoracocolumbar Spine

24
Q

Diagnosing Acute Osteomyelitis (9)

A 
History
FBC + WBC
ESR and CRP
Blood Culture x 3
X-Ray (Normal in first 10-14 Days
Ultrasound
Aspiration
Isotope Bone Scan
Labelled White Cell Scan
25
Q

When can changes start to be seen on radiographs for acute osteomyelitis

A

10-20 days early periosteal changes

26
Q

what is late osteonecrosis

A

sequestrum

27
Q

what is late periosteal new bone

A

involucrum

28
Q

Which scans for Acute Osteomyelitis (4)

A

Technetium-99m labelled diphosphonate
Gallium 67 citrate delayed imaging

Indium-111 labelled WBC scan

MRI

29
Q

Technetium Scan should be done in what stages of acute osteomyelitis

A

Early and Late Phases

30
Q

Micrbiological diagnosis of Acute Osteomyelitis (3)

A

Blood Cultures
Bone Biopsy
Tissue or Swabs from up to 5 sites at Debridement in Prosthetic Infections

31
Q

Treatment of Osteomyelitis Acute

A

Rest and Splint

Antibiotics eg Fluclox and Benzylpen

32
Q

Indications for Surgery of Acute Osteomyelitis (4)

A

aspiration of pus for diagnosis & culture
abscess drainage (multiple drill-holes, primary closure to avoid sinus)
debridement of dead/infected /contaminated tissue
refractory to non-operative Rx >24..48 hrs

33
Q

Complications of Acute Osteomyelitis (6)

A 
metastatic infection
pathological fracture
septic arthritis
septicemia, death
altered bone growth
chronic osteomyelitis
34
Q

Most common organism chronic osteomyelitis

A

Staph aureus

35
Q

chronic osteomyelitis affects which part of bone

A

involucrum and retained sequestra

36
Q

which cancer is associated with chronic osteomyelitis

A

squamous cell carcinoma

Systems 2nd Year: MSK (75 decks)

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