L6 Flashcards
Inflammation
- A dynamic process of chemical and cytological reactions
- A response of vascularized tissues to infections and tissue damage
- Brings defense cells & molecules from the circulation to the infected sites
- A protective response that is essential for survival
Concept of inflammation started
3000 BC in Egyptian civilization(papyrus)
first person who put the 4 cardinal signs of inflammation
Roman celsus
in 19th century put the 5th sign of inflammation
German Virchow
said that inflammation isn’t a disease
Scottish hunter
described the process of phagocytosis
Russian Metchnikoff
describes histamine (inflammatory mediator)
20th century, Thomas Lewis
Inflammation results in:
Accumulation of leukocytes
Accumulation of fluid in extravascular tissue
Systemic effects
Inflammation aims
1- Elimination of the cause of cell injury
2- Elimination of the necrotic cells and tissue
3- Paves the way for repair
4- May lead to harmful results
Without inflammation
Infections would go unchecked
Wounds would never heal
Injured tissues might remain permanent festering sores
Excessive inflammatory reaction become the cause of disease:
Misdirected (autoimmune)
Immunological/hypersensitivity (allergies)
Prolonged (microbes resist eradication)
Anti-inflammatory drugs would control the
harmful sequelae of inflammation rather than interfering with its beneficial effects
Defective inflammation
is also responsible for serious illness as seen in cancer and immunocompromised patients
Five Classic Signs of Acute Inflammation
1- Heat (Calor) 2- Redness (Rubor) 3- Swelling (Tumor) 4- Pain (Dolor) 5- Loss of function (Functio Laesa)
Appendix
Appendicitis