Tuesday, December 21, 2010

INFLAMMATION

Signs of Inflammation
  • Heat (calor) – increased metabolism on site produces heat
  • Redness (rubor) – hyperemia (increased blood flow) from vasodilation
  • Swelling (tumor) – fluid shift to interstitial space
  • Pain (dolor) – release of vasoactive amines (such as histamines & prostaglandins which transmit pain signals to the brain)
  • Loss of Function (functio laesa) – due to swelling and pain
Stages of Inflammation
  • Vascular Stage
    • Phase 1 – local temporary vasodilation
    • Phase 2 – release of vasoactive amines resulting in hyperemia
    • results in an increase of capillary permeability, swelling and pain occurs; macrophages arrive releasing cytokines
  • Cellular Stage
    • neutrophils then leukocytes arrive
    • pus formation from dead WBC and bacteria
    • arachidonic acid cascade occurs releasing histamine, leukotriene, prostaglandin, serotonin (mediators of inflammation)
Cell Reproduction
  • Labile Cells
    • Undergo complete regeneration via proliferation
    • e.g. skin cells, hair follicles, bone marrow
  • Stable Cells
    • Regenerate only if stimulated
    • e.g. liver cells, lymphocytes
  • Permanent Cells
    • Incapable of reproduction
    • e.g. brain cells, cardiac muscle, bone
Cellular Defenses
  • Neutrophil / Polymorphonuclear Cells
    • 55-70%
    • lifespan: hours to days
    • segmented cells: mature neutrophils
    • band cells: immature neutrophils
    • fight bacteria
    • first responders during inflammation
  • Basophil
    • < 1%
    • appear during allergic and parasitic reaction
  • Eosinophil
    • 1-2%
    • appear during parasitic, viral, and allergic reactions
  • Macrophage
    • monocytes: immature macrophages
    • lifespan: months to years
    • stimulate other immune cells to fight by releasing cytokines
    • phagocytize (eat) debris and pathogens
Macrophages of the Different Organs
  • Lungs – Alveolar Macrophages
  • Connective Tissue – Histiocytes
  • Liver – Kupffer Cells
  • Brain – Microglia
  • Bone – Osteoclasts
  • Kidney – Mesangial Cells
Rheumatic Fever
  • Remnants of the dead Streptococcus from the sore throat bind to the heart and joints and are detected by the body as an invader causing inflammation (Type II hypersensitivity)
  • Cause: Group A Beta-Hemolytic Streptococcus (GABHS)
  • Signs and Symptoms (Major / Jones Criteria)
    • Migratory Polyarthritis
    • SQ Nodules / Aschoff Bodies
    • Erythema Marginatum
    • Carditis
    • Sydenham’s Chorea / St Vitus’ Dance
  • Treatment of Choice
    • PENICILLIN G
  • Nursing Management
    • small frequent feeding
    • increased protein diet
    • increase oral fluids
    • respiratory precaution
    • health teaching:
      • get treated for sore throat (“ayaw sige inom Biogesic, di na siya cure-all”)
Herpes Zoster
  • Cause: reinfection of Varicella zoster
    • Signs and Symptoms
      • neuralgia
      • painful unilateral vesicular (serous fluid filled) skin eruptions usually starting on the trunk
    • Drug of Choice
      • ACYCLOVIR - will only stop reproduction of virus and reduce severity but will not totally cure the disease
  • Nursing Management
    • avoid contact with skin eruptions
    • apply wet dressing to soothe pain
    • administer analgesics as ordered 
    • assist patient with ADLs as pain may be unbearable at times
Herpes Simplex
  • Cause: Herpes Simplex Virus Type 1 & 2
  • Types
    • Type 1 Virus: causes orolabial lesions (on the lips)
    • Type 2 Virus: causes genital lesions (on the genitalia)
  • Signs and Symptoms
    • clustered small vesicles, when ruptured forms a shallow ulcer (COLD SORES)
    • itching and pain
    • flu-like symptoms
    • lymphandenopathy
  • Treatment of Choice
    • ACYCLOVIR - will only stop reproduction of virus and reduce severity but will not totally cure the disease
Malaria
  • Malarial parasites digest hemoglobin for energy and produce HAEMOZOIN, a waste hemoglobin pigmentation, which is deposited in tissue, causing inflammation
  • Cause: Plasmodium spp.
  • Species
    • P. falciparum – tertian (fever ever 3rd day)
    • P. ovale – tertian (fever ever 3rd day)
    • P. malariae – quartan (fever ever 4th day)
    • P. vivax – tertian (fever ever 3rd day)
  • Signs and Symptoms
    • paroxysmal chills
    • fever
    • fatigue
    • muscle pain
    • headache
    • dizziness
  • Diagnostic Test of Choice
    • PERIPHERAL BLOOD SMEAR
  • Treatment of Choice
    • CHLOROQUINE (given to travelers entering a malaria-infested area)
    • QUININE & FANSIDAR
Psoriasis
  • chronic non-inflammatory skin disorder characterized by an 8-9x faster rate of production of epidermal cells; hereditary
  • Cause: autoimmune response; T cells migrate to the skin releasing cytokines (which signal inflammation) and causes rapid multiplication of skin cells
  • Types
    • Plaque - raised areas of inflamed skin covered with silvery white scaly patches
    • Guttate - small, scaly, red or pink, teardrop-shaped lesions appearing primarily at the trunk
    • Pustular - red, tender, raised bumps filled with pus usually found at the hands and feet
    • Inverse - smooth inflamed patches appearing at skin folds especially at armpits, genitals, and under the breasts
    • Erythodermic - widespread inflammation and exfoliation of the skin accompanied by itching, swelling, and pain
  • Signs and Symptoms
    • raised areas of inflamed skin covered with silvery white skin (plaques) (80-90% of patients)
    • bilateral symmetry
  • Treatment of Choise
    • tar baths
    • UV therapy
  • Medications
    • steroids
    • triamcinolone
    • retinoids
    • chemotherapeutics
  • Nursing Management
    • stress management
    • promote understanding of disease
    • improve self concept & body image
    • prevent dryness
    • avoid scratching
    • avoid staring at patient
    • use warm water

2 comments:

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