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micro test 4/6

Terms in this set (80)

lymphangitis
-inflammation/ infection of the lymphatic vessels extending to the nearest lymph node
-nodes become enlarged or tender
-wound associated or s. aureus/ s. pyogenes
cellulitis
-acute, spreading infection of the skin that extending into subq
-local pain, redness, tenderness, and swelling
-s. aureus/ s. pyogenes
osteomyelitis
-infection of bone, extension of wound infection
-difficult to treat
-s. aureus
arthritis
-joint infection
-bacteria adhere to joint and grow in synovial fluid
types of wounds
-burn
-cut with sharp object (incised wound)
-puncture wound
-torn tissue (laceration)
-crush injury (contusion)
pathogenesis of wound infections
-breaks in the skin
-can result from poor circulation
-if they dont heal they can form abcesses
wound repair
-bleeding cleans wounds
-phagocytes enter and kill any microorganism in the wound
-fibroblasts enter, form collagen and granulation tissue
-capillaries regrow
-wound pulls together and forma a scar
wound infections
factors:
-foreign material
-contamination
-circulation
-size
-abscess formation
no antibiotics will help
abscess formation
-closed cavity of living and dead microorganisms
-cant treat with antibiotics
-anaerobic and acidic
wound treatment
-debridement is the first step: remove all foreign material and dead tissue
-cover the wound, may need to leave it open until it granulates
-restore circulation
-drain abscesses
pressure injury (decubitus ulcer)
-caused by pressure in prominences that reduce circulation
-bed rested pts, neuro impaired, and elderly
diabetic ulcers
-due to poor circulation and loss of feeling in feet
-increases trauma and reduces their defenses against infection
-prevented by good foot care
surgical site wounds
-may be deep, extending into organ spaces
-clean, clean-contaminated, or contaminated/ dirty
-may cause dehiscence: incision does not heal and tissue opens
anaerobic wound infections
-wounds have low oxygen so anaerobic bacteria can colonize
-gangrene: anaerobic infection under the skin, produce gas
-can be from pts own GI tract
bacterial wound pathogen (s.aureus)
most common
-pyogenic: lots of purulence (toxins and invasions), inflammation, redness, fever, pain
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