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Questions and Answers
What is the primary characteristic that distinguishes gangrene from other types of necrosis?
What is the primary characteristic that distinguishes gangrene from other types of necrosis?
- Caused by reduction in arterial blood flow
- Visible to the naked eye (correct)
- Result of loss of arterial blood supply
- Modified by infection with a mixed bacterial culture
What type of necrosis is associated with dry gangrene?
What type of necrosis is associated with dry gangrene?
- Ischaemic necrosis
- Liquefactive necrosis
- Coagulative necrosis (correct)
- Caseous necrosis
What is the term used to describe an area of necrotic tissue resulting from loss of arterial blood supply?
What is the term used to describe an area of necrotic tissue resulting from loss of arterial blood supply?
- Ischaemia
- Gangrene
- Necrosis
- Infarction (correct)
Which type of gangrene is characterized by the production of gas by anaerobic bacteria?
Which type of gangrene is characterized by the production of gas by anaerobic bacteria?
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What is the primary difference between wet gangrene and dry gangrene?
What is the primary difference between wet gangrene and dry gangrene?
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Which of the following is NOT a type of gangrene?
Which of the following is NOT a type of gangrene?
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Study Notes
Gangrene, Infarction, and Infarct
- Gangrene is a clinical term describing necrosis visible to the naked eye, not a type of necrosis itself.
- Infarction is necrosis caused by a reduction in arterial blood flow, which can result in gangrene.
- Infarction is also an area of necrotic tissue resulting from a loss of arterial blood supply, also known as an area of ischemic necrosis.
Types of Gangrene
- Dry gangrene: necrosis modified by exposure to air, characterized by coagulative necrosis, resulting in blackening and desiccation of the affected area.
- Wet gangrene: necrosis modified by infection with a mixed bacterial culture, characterized by liquefactive necrosis, resulting in a foul-smelling, oozing affect.
- Gas gangrene: a type of wet gangrene where the infection is with anaerobic bacteria that produce gas.
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