Joint Conditions and Infections Quiz
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Questions and Answers

What is the incidence of infection in orthopaedic trauma patients?

  • 15% to 20%
  • 5% to 10% (correct)
  • 2% to 5%
  • 10% to 15%
  • What is the recommended method to diagnose implant-related infection?

  • Ultrasound
  • CT scan
  • Multilocus Polymerase Chain Reaction (MPCR) with electrospray ionization-mass spectrometry and optical imaging (correct)
  • X-ray imaging
  • How can biofilm formation on orthopaedic implants be treated?

  • Physical therapy
  • Application of heat therapy
  • Irrigation, debridement, antibiotics or complete removal of the infected implant (correct)
  • Surgical removal of the implant
  • Who is the intended audience for the contents of the lecture?

    <p>BSc (Hons) students of TWC</p> Signup and view all the answers

    What is the recommended approach for managing orthopaedics infection?

    <p>Recognize, prevent, diagnose &amp; manage infection</p> Signup and view all the answers

    Which factor is crucial for infection control in osteomyelitis and osteonecrosis?

    <p>Soft-tissue envelope evaluation</p> Signup and view all the answers

    What percentage reduction in postoperative complications can be achieved by pre-operative smoking cessation?

    <p>49%</p> Signup and view all the answers

    What is the approximate prevalence of osteomyelitis per 100,000 people a year?

    <p>2.4</p> Signup and view all the answers

    What is the main cause of osteonecrosis?

    <p>Decreased blood flow</p> Signup and view all the answers

    How is diagnosis of osteomyelitis primarily conducted?

    <p>Symptoms, blood tests, medical imaging, and bone biopsy</p> Signup and view all the answers

    What is the recommended treatment for post-traumatic osteomyelitis?

    <p>Surgical debridement and antimicrobial therapy</p> Signup and view all the answers

    What is the Ficat and Arlet classification based on?

    <p>Clinical symptoms and MRI findings</p> Signup and view all the answers

    Which joints are commonly affected by osteonecrosis?

    <p>Hips and knees</p> Signup and view all the answers

    What are some common causes of osteonecrosis?

    <p>Trauma, corticosteroid use, and alcohol consumption</p> Signup and view all the answers

    How is osteonecrosis diagnosed?

    <p>X-rays, bone scans, and MRI</p> Signup and view all the answers

    What is a management option for osteonecrosis?

    <p>Core decompression</p> Signup and view all the answers

    What may living with osteonecrosis lead to?

    <p>Osteoarthritis</p> Signup and view all the answers

    What are the best predictors of infection diagnosis?

    <p>Serum tests (ESR and CRP levels)</p> Signup and view all the answers

    What is a common mode of failure after Total Joint Replacement?

    <p>Implant infection</p> Signup and view all the answers

    What can increase stability and improve outcomes for infected nonunions of long bones?

    <p>Coating intramedullary (IM) rods with antibiotic PMMA cement</p> Signup and view all the answers

    What is a common cause of orthopaedic implant infection?

    <p>Glycocalyceal mode of bacterial growth</p> Signup and view all the answers

    What is least valuable for diagnosing infection?

    <p>Nuclear imaging scans</p> Signup and view all the answers

    What is a common sign of wound infection?

    <p>Purulent drainage</p> Signup and view all the answers

    Which of the following are symptoms of osteochondritis dissecans (OCD)?

    <p>Swelling, joint effusion, and decreased range of motion</p> Signup and view all the answers

    How can adolescents participating in organized sports prevent osteochondritis dissecans (OCD)?

    <p>Educating themselves on the risks of overuse, learning proper mechanics and techniques, using protective gear, and participating in strength and stability training exercises</p> Signup and view all the answers

    What is a potential cause of osteochondritis dissecans (OCD)?

    <p>Reduced blood flow and a potential genetic component</p> Signup and view all the answers

    What is a potential mode of infection for prosthetic joint infections?

    <p>Through the bloodstream or direct penetration into the joint, often caused by bacterial infections</p> Signup and view all the answers

    What are the risk factors for septic arthritis?

    <p>An artificial joint, prior arthritis, diabetes, and poor immune function</p> Signup and view all the answers

    What is the initial treatment for septic arthritis?

    <p>Antibiotics such as vancomycin, ceftriaxone, or ceftazidime, and surgery may be necessary to clean out the joint</p> Signup and view all the answers

    Study Notes

    Joint Conditions and Infections Overview

    • Osteochondritis dissecans (OCD) is a joint condition where bone underneath the cartilage dies due to lack of blood flow, commonly occurring in children and adolescents, particularly in the knee, elbows, and ankles.
    • Symptoms of OCD vary based on the size of the injury and whether the fragment is partially or completely detached, including pain on weight-bearing, swelling, joint effusion, and decreased range of motion.
    • The exact cause of OCD is unknown, but it is thought to be related to reduced blood flow and a potential genetic component.
    • Adolescents participating in organized sports can prevent OCD by educating themselves on the risks of overuse, learning proper mechanics and techniques, using protective gear, and participating in strength and stability training exercises.
    • Septic arthritis, or joint infection, can lead to joint inflammation, with symptoms including redness, heat, pain, decreased joint movement, fever, weakness, and headache.
    • Septic arthritis can be caused by bacteria, viruses, fungi, or parasites, and risk factors include an artificial joint, prior arthritis, diabetes, and poor immune function.
    • Joints can become infected via the blood, trauma, or infection around the joint, with diagnosis involving joint aspiration and culture.
    • Initial treatment for septic arthritis typically involves antibiotics such as vancomycin, ceftriaxone, or ceftazidime, and surgery may be necessary to clean out the joint.
    • Prosthetic joint infections occur in a small percentage of knee and hip joints, with early, delayed, and late phases characterized by different symptoms and common bacteria.
    • The mode of infection for prosthetic joint infections can occur through the bloodstream or direct penetration into the joint, often caused by bacterial infections.
    • Risk factors for prosthetic joint infections include age over 80 years, diabetes mellitus, osteoarthritis, rheumatoid arthritis, immunosuppressive medication, intravenous drug abuse, recent joint surgery, and skin infection.
    • In Hong Kong in 2016, there were 692 HIV reports and 111 AIDS reports, with the majority of cases among males, and the most common HIV subtypes being CRF01_AE and B.

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    Description

    Test your knowledge of joint conditions and infections with this informative quiz. Learn about osteochondritis dissecans (OCD), septic arthritis, and prosthetic joint infections. Understand the symptoms, causes, risk factors, and treatments for these conditions to improve your understanding of joint health.

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