Dz: Ch.1&2 - Disease/Abnormalities Flashcards
(38 cards)
The science of tracking the pattern or occurrence of disease
Epidemiology
Concerns the causative factors in a disease
Etiology
What is seen when the body can’t compensate changes anymore?
signs and symptoms
What are signs & symptoms?
objective indicators of disease, subjective feelings
Mechanisms that cause disease
Diet, Germs, Genes, proteins
Pathology
causes and development of abnormal conditions, as well as structural and functional changes that result from the disease process
Inflammation
Bodies response to injury
Promotes healing, allows homeostasis to occur
Inflammatory Response
Initial damage > mast cells, and platelets release chemical mediators of inflammationInitial vasoconstriction > histamine released >blood vessels become permeable> causes redness and edema to occur2ndstage: blood vessels become congested >clotting occurs
(2) Classifications of inflammation
Transudate- Watery fluid
Exudate- Water, protein, cells of inflammation
First & Second Intention wound healing
1st- healing of clinical or surgical wound or skin penetrating injury (3-6wks to heal)2nd- Delayed healing of surgical wound or healing of a nonsurgical wound (up to 18mo to heal)
Phases of 2nd intention wound healing
Proliferative (form of granulation tissue)
Granulation tissueOrganization (fibrin placed)
Scar tissue
Remodeling of scar tissue (maturation)
Wound healing complications
Adhesions - form contractors =
LOF
Dehiscence - wound opens up
Pressure Ulcers and causes
Occurs when constant pressure over boney prominence - 1hr of constant pressureShearing - frictionMaceration - skin being too moist
T Lymphocytes
form in bone marrow then mature in thymus-types: helper T cells, Cytotoxic T cells
B Lymphocytes
develop and mature in marrow
produce antibodies
Hypersensitivity Reactions
Type 1: immediate (anaphylactic reaction) -Asthma, Anaphylaxis, Allergic Rhinitis
Type 2: produce antibodies (react with antigens against own tissue)
-Autoimmune Disease, blood trans, HDN
Type 3: immune complex reaction
Type 4:delayed response: cell mediated
Vectors
Insects/Parasites that carry disease
MRSA
Methicillin resistant Staphylococcus aureus
Virus
Need a living host to survive and reproduceDo not respond to antibiotics
Fungi
Mold or yeast (requries mostiure)
Tinea: fungus invades superficial layers of skin
Coccidioides Immitis: AKA?
Valley Fever
Incubation period
time period between contact with the infection and when symptoms appear
Resident Flora
“normal flora” in many areas of the bodylung, bladder, stomach - not normal areas
Benign vs. Malignant Tumors
Benign: cells are similar, slow growth, encapsulated, localized, systemic effects usually not present, not life threatening Malignat- cells varied, rapid growth, no capsule, metastasize, systemic effects often present, life threatening