What Is Focal Ischemia?
The reduced blood content of an organ or tissue is called ischemia. Ischemia can be a local manifestation of systemic anemia, or it can be the result of a local blood circulation disorder.
Ischemia
Right!- Chinese name
- Ischemia
- Definition
- Reduced blood content in organs or tissues
- which performed
- Is a local manifestation of generalized anemia
- the reason
- Compressive ischemia due to tumor
- The reduced blood content of an organ or tissue is called ischemia. Ischemia can be a local manifestation of systemic anemia, or it can be the result of a local blood circulation disorder.
- Organ or
- According to the cause of ischemia, it can be divided into the following types:
1. Compression ischemia due to tumors, tight bandages, effusion, etc.
- Ischemic organs or tissues have reduced volume, reduced local temperature, reduced fullness, and shrunk the capsule. There is little or no blood on the section. Due to the decrease in blood content, the redness of the blood is lost and the inherent color of the organs and tissues is displayed (for example, the lungs, kidneys and mucous membranes are gray, and the liver is brown). Hypoxia-sensitive tissue cells often undergo atrophy, degeneration, or necrosis.
The consequences of ischemia depend on the degree and duration of ischemia, the sensitivity of organs and tissues to hypoxia, and the presence or absence of collateral circulation compensation. If the arterial blood flow is completely cut off and collateral circulation cannot be established, the tissue may develop acute necrosis. Compared with skeletal muscle, myocardium is sensitive to hypoxia, and skeletal muscle is more tolerant. Compared with parenchymal cells, anemia and hypoxia lead to atrophy, degeneration, or necrosis of parenchymal cells, while connective tissue proliferates.