Mechanism for dealing with exogenous or endogenous injuries
Inflammatory process
What are the two broad categories of the inflammation process?
Acute
Chronic
What is the underlying cause in many diseases?
Inflammation
What are characteristics of acute inflammation?
Abrupt onset
Short duration
Exudative reaction
Painfull
What are the cardinal signs of acute inflammation?
Redness
Heat
Edema
Pain
Loss of function
What are characteristics of chronic inflammation?
Longer duration
Proliferative response
Usually not painfull
What are the 4 phases in the inflammatory response process?
Initiation
Amplication
Destruction
Termination
What phase/stage is this in the inflammatory response process?
“activated when the injury happens; changes to structure of small blood vessels; loss of fluid from blood; movement of white blood cells to area”
Initiation
Stages 1-5
What phase/stage is this in the inflammatory response process?
“more and different types of white blood cells are moved to injured area with goal to phagocytize all foreign material”
Amplication
Stage 5
What phase/stage is this in the inflammatory response process?
“white blood cells neutralize the area and clean up debris”
Destruction
Stage 6-7
What phase/stage is this in the inflammatory response process?
“inflammatory process is inhibited or stopped”
Termination
Stage 8
active during initial stages: life expectancy 6-9 hours
Granulocytes
first to arrive and most active; goal is to eliminate or neutralize the initial cause
Polymorphonuclear neutrophil (PMN’S)
play a role with inflammation in allergic reactions
Eosinophil and Basophils (contain histamine)
more active during later stages; life expectancy several months
Agranulocytes
circulate within blood until they become “fixed” then differentiate with macrophage for specific tissue
Monocyte
found in lymph system; play role in immunity; primary responder in viral infection
Lymphocytes
created in bone marrow; has histamine in granules in cytoplasm’s that break open in response to stimulus
Mast cells
What are the “recruiters”?
Chemical mediators
Direct the actions of the cells that are part of the inflammatory process
Chemical mediators
responsible for dilation of blood vessels and vascular permeability
Histamine
response to platelet activating factor; also increases vascular permeability
Serotonin
causes aggregation of platelets
Platelet activating factor
vasodilation, vascular permeability, increased feeling of pain, play a role in elevating temperature, responsible for tissue destruction in perio disease
Prostaglandins