Infection, Inflammation, and Immune Response

Overview of Immunity

• Inflammation
  • Protects immunity and defends the body.
  • Autoimmune: Misfiring of the immune system.

Types of Immunity

• Innate Immunity
  • Non-specific response.
  • First line of defense: skin, mucous membranes, hair, and innate responses present at birth.
  • Examples:
  • Natural barriers: Skin and mucous membranes.
  • Cells involved: Phagocytes.
• Adaptive Immunity
  • Specific and has memory.
  • Response is activated after exposure to a pathogen.
  • Key components: T cells and B cells.
  • Vaccination: Stimulates adaptive immunity leading to an immune memory.

Inflammation: Acute vs. Chronic

• Acute Inflammation
  • Short term response from injury (e.g., bee sting).
  • Rapid onset with symptoms like redness, heat, swelling, and pain.
  • Protective response aimed at healing.
  • Management includes removing foreign objects or allergens contributing to inflammation.
• Chronic Inflammation
  • Long-term and can lead to conditions like arthritis.
  • Destructive and associated with autoimmune diseases (e.g., rheumatoid arthritis [RA], lupus).
  • Impairs healing and may result in prolonged complications.
  • Example of RA: Rise in inflammatory markers leading to disability necessitating adaptations for daily activities.

Autoimmune Disorders

• Conditions where the immune system mistakenly attacks the body.
  • Types:
  • Rheumatoid Arthritis (RA)
  • Lupus
  • Multiple Sclerosis (MS)
  • Symptoms:
  • Inflammation causes tissue and organ damage.
  • Treatment often involves immunosuppression.
  • Priority nursing concern: Infection Risk

Management of Immunosuppressive Conditions

• Nursing Considerations for Immunosuppressed Patients
  • Patients may have atypical signs of infection; typical indicators may be blunted (e.g., lack of fever).
  • Symptoms of infection may present as:
  • Confusion, lethargy.
  • Potentially normal or low white blood cell (WBC) counts due to depletion.
  • Importance of recognizing subtle changes in patients' conditions should be taken seriously.
  • Red flag: Mental status changes may indicate underlying problems.

Signs of Infection in Immunosuppressed Patients

• Recognition of Sepsis
  • Symptoms may include:
  • Fever or low temperature
  • Altered mental status
  • Hypotension (low systolic blood pressure)
  • Tachycardia (high heart rate)
  • Lactic Acid Levels: Elevated levels indicate severity and potential tissue hypoxia due to infection.

Patient Care Practices

• Early treatment is critical.
  • Antibiotics should be administered quickly even before culture results to prevent sepsis complications.
  • Patients might require hospitalization immediately upon infection signs.
• Monitoring Protocols: For patients suspected of sepsis.
  • Look for tapering blood pressure and heart rate changes, mental status variations, etc.

Overview of Cancer Pathophysiology

• Cancer is characterized as uncontrolled cell growth caused by genetic mutations during cell replication.
• Risk Factors for cancer development:
  • Smoking, UV exposure, genetics, diet, and lifestyle choices.
  • Importance of screenings (e.g., mammograms, colonoscopies) based on medical history.
• Treatment Approaches
  • Options include:
  • Surgery (cutting out tumors).
  • Radiation (now often precise rather than generalized).
  • Chemotherapy, with a focus on managing side effects and supporting patient wellbeing.

Nursing Management for Oncologic Conditions

• Focus on pain management and patient support.
• Monitor the physical and emotional wellbeing of patients affected by cancer treatments.
• Provide education on infection prevention and general health practices.

Key Takeaways

• Pain Management: Essential component of care, requiring multidisciplinary approaches.
• Infection Control: Emphasizing hand hygiene and patient education in managing health.
• Supportive Care: Critical for the emotional and psychological health of patients undergoing treatment.