Inflammation Flashcards
inflammation
to set on fire
goals of inflammation
eliminate initial cause of cell injury, remove necrotic cells and tissue, initiate repair process
components of inflammatory process
WBCs and plasma
four cardinal signs of inflammation
redness, heat, swelling, and pain (+/- loss of function)
result from increased amount of blood in affected tissue
redness and heat
congestion of tissue due to migration of fluid from vessels and exudation
swelling
pressure on nerve endings
Pain
little to no tissue destruction, slight vascular response, minimal exudation
mild inflammatory response
some tissue damage, visible host reaction
moderate inflammatory response
significant tissue damage, abundant exudation
severe inflammatory response
extravascular fluid with high protein content
exudate
extravascular fluid with low protein content
transudate
single area of inflammation
focal
many, scattered areas of inflammation
multifocal
all tissue within a particular zone is affected
locally extensive
involving entire organ or tissue
diffuse
acute inflammation
pathogen or wound, several days, repair, protective response, beneficial for host
chronic inflammation
persistence of stimulus, long-term infections, deleterious for host, long-term consequences
ex. of infections
bacterial, viral, fungal, parasitic
ex. of tissue necrosis
ischemia, trauma, physical or chemical injury
ex. foreign bodies
splinters, dirt, sutures
increased blood flow to the tissue
vasodilation
chemical process which directs cells to leave the blood and enter tissue
chemotaxis
WBCs and RBCs will leave affected vessel in response to chemotaxis and enter tissue
emigration
process by which WBCs ingest dead cells, foreign particles, or bacteria
phagocytosis
the body controls its “actors” with the lymphatic system and with chemicals called
mediators