5.3. Bone and Soft Tissue Infection - Acute Septic Arthritis Flashcards Preview

3rd Year - MSK Diseases > 5.3. Bone and Soft Tissue Infection - Acute Septic Arthritis > Flashcards

Flashcards in 5.3. Bone and Soft Tissue Infection - Acute Septic Arthritis Deck (14):
1

What is the Route of Infection for Acute Septic Arthritis?

1. Direct Invasion
2. Eruption of a Bone Abscess
3. Haematogenous (Blood) Spread

2

What are the different ways Acute Septic Arthritis can be spread, via Direct Invasion?

1. A Penetrating Wound (Iatrogenic - Joint Injection)
2. An Intra-Articular Injury
3. Arthroscopy

3

What are the most common causative Organisms of Acute Septic Arthritis?

1. Staph. Aureus
2. H. Influenzae
3. Strep. Pyogenes
4. E. Coli

4

What is the Pathology of Acute Septic Arthritis?

Due to the infection:
1. Articular Cartilage is attacked by the Bacterial Toxins and Cellular Enzymes
2. This causes Acute Synovitis with Purulent Joint Efusion
3. This leads to complete distruction of the Articular Cartilage

5

What are the recovery options (Sequelae) for Acute Septic Arthritis?

1. Complete Recovery
2. Partial Loss of the Articular Cartilage, and Subsequent Osteoarthritis
3. Fibrous / Bony Ankylosis

6

What is the Clinical Presentation of Acute Septic Arthritis in a Neonate?

1. Irritability
2. Resistant to Movement
3. Ill

7

What is the Clinical Presentation of Acute Septic Arthritis in a Child?

1. Reluctance to move the Joint
2. Increase in Temperature
3. Increase in Pulse
4. Increase in tenderness

8

Which joints does Acute Septic Arthritis most commonly present in Adults?

Superficial Joints:
1. Knee
2. Ankle
3. Wrist

9

How common is Acute Septic Arthritis in healthy adults?

Rare

10

What are the investigations of Acute Septic Arthritis?

1. Full Blood Count
2. White Cell Count
3. Inflammatory Markers - ESR + CRP
4. Blood Cultures
5. X-Ray
6. Ultrasound
7. Fine Needle Aspiration

11

What is the most common cause of Acute Septic Arthritis in an Adult?

An Infected Joint Replacement

12

What is the outcome of an Infected Joint Replacement?

1. Removal or Arthroplasty
2. Amputation
3. Death
Note this is very rare but disasterous

13

What is the Differential Diagnosis of Acute Septic Arthritis?

1. Acute Osteomyelitis
2. Trauma
3. Irritable Joint Syndrome
4. Haemophilia
5. Rheumatic Fever
6. Gout
7. Gaucher's Disease

14

What is the treatment of Acute Septic Arthritis?

1. General Supportive Measures (Fluids + O2)
2. Antibiotics
3. Surgical Drainage and Lavage - emergency

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