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70 Cards in this Set
- Front
- Back
Chain of infection includes;
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Infectious agent, reservoir, portal of exit, means of transmission, portal of entry, susceptible host
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Define infection
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Invasion of the body by a pathogenic microorganism that reproduce/multiply, causing disease
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An infectious disease is a communicable disease when;
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it is transmissible to others
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Define vector
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Disease carrier (non-human) from one host to another (i.e. West Nile vector=bird)
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Factors to susceptibility to infection
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age, nutritional status, heredity, medical diagnosis, medical therapy
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Nosocomial infections are;
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Infections that develop within hospital/LTC setting, after admission
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Sites of entry for nosocomial infections;
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Urinary tract, surgical/traumatic wounds, resp tract, bloodstream
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Diagnostic tests for possible infection(s);
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CBC, C&S, Ova & Parasite, TB test, chest x-ray
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Single most important technique in preventing/controlling transmission?
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hand washing
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Asepsis is;
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absence of disease producing pathogens (medical/surgial)
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medical asepsis
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used to reduce number of microorganisms and prevent spread (hand washing, ppe)
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Surgical asepsis
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procedures to eliminate microorganisms (aka-sterile technique)
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Inflamatory response is;
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a local response to injury or infection; localizes and prevents the spread of infection and promotes wound healing
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vascular phase of the inflammatory response
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pain, swelling, redness, changes in function
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Define wound
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break, disruption in normal skin integrity
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wound classifications
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intentional, unintentional, open/closed, acute/chronic
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intentional wound
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Closed wound - result of planned invasive threatment or therapy (surgery, IV therapy, etc.)
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unintentional wound
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wounds are accidental - unexpected trauma, forcible injury, burns
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open wound
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occurs intentional / unintentional - skin surface broken (incisions/abrasions)
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closed wound
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blow, force, trauma - skin surface not broken - soft tissue damage - internal injury, hemorrhage
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accute wound
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surgial incision - healing in days to weeks - edges well approximated (dec'd risk for infec)
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chronic wound
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healing process impaired - edges not approximated (risk for infec) - remain in inflammatory phase of healing - arterial/venous insufficiency related
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Primary wound healing
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skin edges are well approximated - min tissue loss - heal from outside in (i.e. surgical incissions)
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Secondary wound healing
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Scar tissue formation increases - granulation tissue closes wound from inside out
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Tertiary healing
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Wounds left open for several days to allow drainage to occur
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Factors affecting wound healing
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Local and systemic
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local factors
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pressure, desiccation, maceration, trauma, edema, infection, and necrosis
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Systemic factors
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Age, circulation & oxygenation, nutritional status, wound condition, medications, health status
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Wound complications
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Infection, hemorrhage, dehiscence, eviseration, fistula
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Wound complication - infection
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bacterial invasion at time of surgery, trauma, or after initial wound occurs
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wound complication - hemorrhage
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excessive bleeding
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wound complication - dehiscence
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partial/total separation of wound layers
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wound complication - evisceration
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complication of dehiscence - wound completely seperates with protrusion of viscera through incisional area
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wound complication - Fistula
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abnormal passage from an internal organ to outside of body or to another internal organ
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Phases of wound healing
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Hemostasis, inflammatory, proliferation, maturation
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Hemostasis phase
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platelet activation & clustering occurs; blood vessels constrict & blood clotting (occurs 1st after injury)
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Inflammatory phase
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Leukocytes & macrophages present in wound - fibroblasts present to fill in wound - acute inflammaton - (4 to 6 days)
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Proliferation phase
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new tissue is built to fill the wound space which forms fibrin - (aka: fibroblastic, regenerative, connective tissue phase) Lasts several weeks
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Granulation tissue
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Durring proliferation phase - foundation of scar tissue - highly vascular, red, bleeds easily
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Maturation phase
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3 weeks after injury - can continue for months or years - collagen remolding occurs - scar tissue formation occurs
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Pressure ulcer
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localized area of tissue necrosis; can be accute or chronic
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Pressure ulcer causes
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soft tissue compression between a bony prominence and an external force (insyufficient tissue perfusion, friction & shearing forces)
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Pressure ulcer locations
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Sacrum, coccyx, trochanter, calcaneous
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Pressure ulcer related factors
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imobility, nutrition/hydration, moisture, mental status, age
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Pressure ulcer stage 1
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change in skin temp, tissue consistency, sensation
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Pressure ulcer stage 2
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thickening of skin loss (blister, abrasion, shallow crater)
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Pressure ulcer stage 3
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full thickness skin loss of subq tissue - may include tendons, etc
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Pressure ulcer stage 4
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full thickness skin loss with extensive destruction - involves tendons, bone, possibly organs
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Wound assessment
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inspection (sight/smell), palpation, drainage, odor, pain
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RYB wound classification
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R=Red-protect with nurse intervention (gentle cleanse, moist dressing)
Y=Yellow-Exudate (drainage) B=Black-Eschar (necrotic tissue) - debredement of tissue before wound can heal |
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Acute vs chronic pain
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acute=rapid onset, mild/severe
chronic=limited, intermittent, poorly localized |
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Pain Remission
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Disease still present, but lacks symptoms
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Pain exacerbation
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symptoms reappear
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Pressure ulcer stage - Cutaneous
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superficial - skin or subq tissue (ie. paper cut)
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Description of pain - somatic
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diffuse of scattered - originates in tendons, ligaments, bones, blood vessels, nerves
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Description of pain - viscaral
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poorly localized - associated with organs that stretch, distend, are ischemic, or inflamed (ie. abdomen)
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Mode of pain transmission
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referred pain, neuropathic pain, phantom pain, psychogenic pain
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Referred pain
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pain manifests where it does not originate (ie. heart attack & arm spasm with jaw pain)
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Neuropathic pain
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injury to peripheral nerves of the CNS (burning, stabbing) - short or lingering in duration
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Phantom pain
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lacks physiologic or pathologic substance - sensory receptors in brain still exist, but limb does not
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Psychogenic pain
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physical cause for pain cannot be identified
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Responses to pain
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Behavioral, affective, physiologic
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Behavioral response
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protection of injured area, restlessness, moaning, crying (voluntary responses)
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Affective response
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withdrawal, depression, anxiety, fear, fatigue (psychological response)
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Physiologic response
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(involuntary response)Sympathetic response - (moderate, superficial) - inc'd BP, inc'd PR, inc'd RR, puil dialation, pallor Parasymathetic response (severe, deep), N/V, fainting, dec'd BP & PR, rapid & irregular breathing
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Pain process involves;
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transduction, transmission, perception, modulation
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transduction
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activation of pain receptors - pain stimuli changes into electrical impulses that travel from periphery to the spinal cord at the dorsal horn
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transmission
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pain sensation from site of injury/inflammation
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perception
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sensory process that occurs when a stimylas for pain is present
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modulation
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sensation of pain is modified/inhibited
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