slide 0 unit 2 seminar dr. j. v. stoia. slide 1 question #1 you are asked to place an hiv...
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Slide 1
Unit 2Seminar
Dr. J. V. Stoia
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Slide 2
Question #1
You are asked to place an HIV positive patient in an exam room and obtain vital signs. The patient brings into the exam room a requested urine specimen. What infection control precautions should you be using in this situation?
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Slide 3
Question #1
Because the patient may be immunodeficient, you should first make sure to wash your hands properly and thoroughly before approaching and touching the patient.
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Slide 4
Question #1
Gloves or other personal protective equipment are not necessary for normal contact with the patient (i.e., obtaining radial pulse or blood pressure). However, when coming in potential contact with body fluids (i.e., urine specimen, saliva with oral temperature probe) you should wear gloves.
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Slide 5
Question #1
Remember that equipment used to obtain the vital signs (i.e., stethoscope, thermometer) will need to be properly disinfected before being reused on another patient. If they are available, use disposable probes and other equipment.
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Slide 6
Question #1
. Finally, rewash your hands after contact with the patient is complete.
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Slide 7
Question #2
Many elderly patients with rheumatoid arthritis are treated with non‑steroidal anti‑inflammatory drugs (NSAIDs) at the outpatient facility you are assigned to work. Some express concerns about various signs and symptoms they are experiencing. What are the side effects of NSAIDs they should be concerned about and report to the physician or nurse?
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Slide 8
Question #2
Potentially dangerous side effects of NSAID therapy include GI ulceration and bleeding, and blood dyscrasias (i.e., abnormalities) that may affect bleeding and clotting factors.
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Slide 9
Question #2
. Other common side effects are rash, tinnitus, and hypersensitivity to sunlight.
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Slide 10
Question #2
Side effects as well as drug toxicities are more common in the elderly population not only for NSAIDs but other classes of drugs, too. This is due to impaired or decreased liver and/or renal metabolism as part of the normal aging process.
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Slide 11
Question #2
Encourage each patient to discuss problems such as GI upset, GI bleeding, dark or tarry stools, increased bruising, rash, or tinnitus with the doctor or nurse for further assessment.
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Slide 12
Major functions of the immune system
Protect the body against foreign organisms
Maintain homeostasis by eliminating damaged cells (phagocytosis)
Recognize and guard against abnormal cells (inflammatory response)
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Slide 13
Inappropriate responses of the immune system
Hyperactive (allergic) – excessive response
Immunodeficient (e.g., AIDS) – inadequate response
Autoimmune (e.g., SLE) – misdirected response
Transplant rejection – attack to beneficial foreign tissues
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Slide 14
Acquired Immunity
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Slide 15
Trivia Question
Where does the term “vaccination” come from?
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Slide 16
Cellular Elements of Immunity:
Cellular elements of natural immunity: Natural killer cells (NK) Polymorphonuclear neutrophils (PMN) Macrophages
Cellular elements of acquired immunity: T lymphocyte cells B lymphocyte cells Phagocytes
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Slide 17
T lymphocyte cells include
Cytotoxic T cells: destroy virus-infected cells, tumor cells, or allograft cells
Helper T cells: stimulate B cells and activate cytotoxic T cells
Suppressor T cells: moderate the immune response by inhibiting B and T cells
Memory T cells: are reactivated only by re-exposure to previous antigen
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Slide 18
B lymphocyte cells include
Memory B cells: reactivated only by re-exposure to previous antigen
Plasma cells: secrete antibodies that attach to antigens
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Slide 19
Orderly Function of the Immune System (cont’d.)
Immunoglobulins IgG (75-85%) IgA (5-15%) IgM (5-10%) IgD (0.2%) IgE (0.5%)
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Slide 20
Immunodeficiency Diseases
Increased susceptibility to bacterial infections resulting from a B cell deficiency.
Increased susceptibility to viral, fungal, and protozoan infections, usually from T cell deficiency.
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Slide 21
Acquired Immunodeficiency Syndrome (AIDS)
Caused by human immunodeficiency virus (HIV)
Diagnosed by presence of HIV antibodies in the blood (common test: ELISA; confirmation: Western blot)
HIV attacks helper T lymphocytes Reduces cell-mediated immunity Attacks nervous system directly
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Slide 22
Acquired Immunodeficiency Syndrome (AIDS)
HIV transmission is through direct contact with blood or semen of infected person sexual contact blood transfusions and other blood products contaminated shared needles (IV drug use, etc.) accidental needle sticks to fetus via placenta or during birth process from
infected mother
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Slide 23
Acquired Immunodeficiency Syndrome (AIDS)
AIDS treatment currently no cure Goal is to maintain the best possible
immune status by using immunizations and anti-infective therapy
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Slide 24
Immunodeficiency Diseases (cont’d.)
Universal Precautions Thorough and frequent hand washing. Personal protective equipment worn as required by
specific task (e.g. gloves, gown, goggles, mask). Proper disposal of all sharps in designated
biohazard containers. No needle recap prior to disposal. Caution in handling of laboratory specimens. Proper containment and disinfection of blood and
body fluid spills. Use clean mouthpieces and resuscitation bags.
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Slide 25
Immunodeficiency Diseases (cont’d.)
Common Variable Immunodeficiency acquired B cell deficiency
Selective Immunoglobulin A Deficiency inadequate production of IgA
Severe Combined Immunodeficiency ineffective development and function of
both T cells and B cells
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Slide 26
Autoimmune Diseases
What is autoimmune disease? What are some examples?
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Slide 27
Autoimmune Diseases
Lymphocytes and antibodies are sensitized to develop against the body’s own organs or tissues.
May be triggered by disease, injury, metabolic changes, or mutation in immunologically competent cells.
May be caused by certain drugs or chemicals, trauma, or viral infection.
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Slide 28
Autoimmune Diseases (cont’d.)
Pernicious anemia
Impaired absorption of B12 due to decreased gastric production of hydrochloric acid.
Treatment consists of monthly intramuscular injections of vitamin B12 during the person’s entire lifetime.
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Slide 29
Autoimmune Diseases (cont’d.)
Pernicious Anemia
Symptoms: weakness and tingling and numbness in extremities, altered vision, lightheadedness, tinnitus, palpitations, weight loss, digestive disturbances, sore tongue.
Signs: decreased red blood cell, white blood cell, and platelet counts; increased red blood cell mean volume; decreased hemoglobin levels; jaundice; optic nerve atrophy; decreased amount of gastric acid.
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Slide 30
Autoimmune Diseases (cont’d.)
Collagen Diseases Systemic lupus erythematosus Scleroderma Sjogren syndrome Rheumatoid arthritis Juvenile rheumatoid arthritis Ankylosing spondylitis Polymyositis
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Slide 31
Autoimmune Diseases (cont’d.)
Systemic Lupus Erythematosus (SLE) Inflammation of skin, joints, nervous
system, kidneys, lungs, and other organs.
Butterfly rash across face may be present.
Other rashes may appear on other exposed skin areas.
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Slide 32
Autoimmune Diseases (cont’d.)
Butterfly face rash Alopecia Photosensitivity Raynaud’s
phenomenon Thrombocytopenia Discoid skin lesion Nasopharyngeal
ulceration Polyarthritis
Pleuritis or pericarditis Protein or casts in the
urine Hemolytic anemia False-positive serology Abnormal blood
antibodies LE cells (leukocytes)
present in lab testing
Systemic Lupus Erythematosus (SLE)
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Slide 33
Autoimmune Diseases (cont’d.)
Rheumatoid arthritis (RA) Chronic, inflammation and edema of the synovial
membranes surrounding joints. Destruction of cartilage and adjacent bone. May produce weight loss, fever, and malaise. Joint pain and stiffness, especially in morning. Bilateral joint tenderness, edema, erythema,
warmth.
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Slide 34
Autoimmune Diseases (cont’d.)
Rheumatoid arthritis treatment aimed at: Reducing inflammation and pain Preserving joint function Preventing joint deformities
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Slide 35
Autoimmune Diseases (cont’d.)
Ankylosing spondylitis Inflammation and ossification of the
joints leading to decreased range of motion and spinal bone fusion.
Sacroiliac spine area is usually affected first and results in recurring low back pain and morning stiffness.
History may include inflammatory bowel disease, heel pain, and family incidence of arthritic conditions
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Slide 36
Autoimmune Diseases (cont’d.)
Multiple sclerosis (MS) Inflammatory disease of the central
nervous system. Demyelination of nerves occurs in the
brain and spinal cord. Signs and symptoms are primarily
neurologic and related to areas of myelin destruction.
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Slide 37
Autoimmune Diseases (cont’d.)
Myasthenia gravis (MG) Chronic progressive neuromuscular
disorder. Autoantibodies produced to acetylcholine
receptor in muscle cells. Ineffective nerve-muscle junction results
in severe weakness, difficulty talking and swallowing, drooping eyelids and diplopia.
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Slide 38
Autoimmune Diseases (cont’d.)
Vasculitis Inflammation in the walls of blood
vessels that may lead to necrosis, thrombus formation, and local infarct
Can be classified as small vessel or systemic; affecting medium and large arteries