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Oedema is a build-up of fluid in the body which causes the affected tissue to become swollen. The swelling can occur in one particular part of the body or may be more general, depending on the cause.
Oedema is a build-up of fluid in the body which causes the affected tissue to become swollen. The swelling can occur in one particular part of the body or may be more general, depending on the cause.
See lessThrombosis happens when a blood clot, or thrombus, grows in blood vessels. This can reduce blood flow. An embolus is any foreign material that travels within the body. If it becomes stuck and severely blocks the flow of blood, the issue is called an embolism. The material of an embolus may be: 1. AiRead more
Thrombosis happens when a blood clot, or thrombus, grows in blood vessels. This can reduce blood flow.
An embolus is any foreign material that travels within the body. If it becomes stuck and severely blocks the flow of blood, the issue is called an embolism.
The material of an embolus may be:
1. Air.
2. Fat.
3. Blood clot.
4. Any other foreign material.
Any blockage in a vein or artery can cause life threatening complications. One way that doctors classify these blockages is based on where they occur.
One of the most commonTrusted Source types of embolism, for example, is pulmonary embolism. This happens when an embolus travels to the veins of the lungs, disrupting blood flow.
Like any blockage that interferes with blood flow to the heart, pulmonary embolism can lead to a stroke or heart attack.
See lessThe fate of an embolism depends on the type of embolism involved, its size, location, and the underlying health of the individual. For example, a pulmonary embolism is a blood clot that blocks and stops blood flow to an artery in the lung. In most cases, the blood clot starts in a deep vein in the lRead more
The fate of an embolism depends on the type of embolism involved, its size, location, and the underlying health of the individual. For example, a pulmonary embolism is a blood clot that blocks and stops blood flow to an artery in the lung. In most cases, the blood clot starts in a deep vein in the leg and travels to the lung. Because one or more clots block blood flow to the lungs, pulmonary embolism can be life-threatening. However, prompt treatment greatly reduces the risk of death.
The impact of a pulmonary embolism on the heart’s right ventricle function is the most common cause of pulmonary embolism death. For people with pulmonary embolism but no associated decrease in right ventricle function, estimates place mortality (death) at around 2%.
See lessThe clinical effects of an embolism depend on the type of embolism involved. For example, a pulmonary embolism is a blood clot that blocks and stops blood flow to an artery in the lung. In most cases, the blood clot starts in a deep vein in the leg and travels to the lung. Pulmonary embolism symptomRead more
The clinical effects of an embolism depend on the type of embolism involved. For example, a pulmonary embolism is a blood clot that blocks and stops blood flow to an artery in the lung. In most cases, the blood clot starts in a deep vein in the leg and travels to the lung. Pulmonary embolism symptoms can vary greatly, depending on how much of your lung is involved, the size of the clots, and whether you have underlying lung or heart disease. Common symptoms include shortness of breath, chest pain, fainting, rapid or irregular heartbeat, lightheadedness or dizziness, excessive sweating, fever, leg pain or swelling, or both, usually in the back of the lower leg.
An air or gas embolism is a bubble that becomes trapped in a blood vessel and blocks it. This can lead to many different symptoms depending on where the blockage occurs. Symptoms of a severe air embolism might include difficulty breathing or respiratory failure and chest pain or heart failure.
See lessAn embolism is the obstruction of the flow of blood by an embolus, a particle or aggregate of substance that is abnormally present in the bloodstream. When a thrombus, a blood clot, becomes dislodged and a piece breaks off, it is called an embolus. The embolus can obstruct the pulmonary circulation,Read more
An embolism is the obstruction of the flow of blood by an embolus, a particle or aggregate of substance that is abnormally present in the bloodstream. When a thrombus, a blood clot, becomes dislodged and a piece breaks off, it is called an embolus. The embolus can obstruct the pulmonary circulation, and the body sends a signal to release neurohormonal substances and inflammatory mediators, which cause vasoconstriction.
Pulmonary embolism occurs when clots break off and embolize into the pulmonary circulation. Pulmonary emboli are typically multiple, with the lower lobes being involved more frequently than the upper, and bilateral lung involvement being more common. Once deep venous thrombosis develops, clots may dislodge and travel through the venous system and the right side of the heart to lodge in the pulmonary arteries, where they partially or completely occlude one or more vessels.
See lessThere are different types of embolism classified based on the embolic material: 1. Thromboembolism - embolism of thrombus or blood clot. 2. Fat embolism - embolism of fat droplets. 3. Air embolism (also known as a gas embolism) - embolism of air bubbles. 4. Septic embolism - embolism of pus containiRead more
There are different types of embolism classified based on the embolic material:
1. Thromboembolism – embolism of thrombus or blood clot.
2. Fat embolism – embolism of fat droplets.
3. Air embolism (also known as a gas embolism) – embolism of air bubbles.
4. Septic embolism – embolism of pus containing bacteria.
5. Tissue embolism – embolism of small fragments of tissue.
6. Foreign body embolism – embolism of foreign materials such as talc and other small objects.
7. Amniotic fluid embolism – embolism of amniotic fluid, fetal cells, hair or other debris that enter the mother’s blood stream via the placental bed of the uterus and trigger an allergic reaction.
The pathway of the embolus can have 3 different types:
1. Anterograde.
2. Retrograde.
3. Paradoxical.
In anterograde embolism, we say that the movement of emboli is according to the direction of blood flow. However it is otherwise in retreograde embolism, when the weight of the emboli is high enough to oppose the blood flow direction. This is usually only siginificant in blood vessels with low pressure (veins) or emboli of high weight. In paradoxical embolism or also known as crossed embolism, the embolus from veins are crossed to the arterial blood system. This is usually only found in heart defects such as septal defects between the atria or ventricles.
An embolism is a blocked artery caused by a foreign body, such as a blood clot or an air bubble.
An embolism is a blocked artery caused by a foreign body, such as a blood clot or an air bubble.
See lessAngiogenesis is the physiological process through which new blood vessels form from pre-existing vessels. This process involves the migration, growth, and differentiation of endothelial cells, which line the inside wall of blood vessels. The process of angiogenesis is controlled by chemical signalsRead more
Angiogenesis is the physiological process through which new blood vessels form from pre-existing vessels. This process involves the migration, growth, and differentiation of endothelial cells, which line the inside wall of blood vessels. The process of angiogenesis is controlled by chemical signals in the body, such as vascular endothelial growth factor (VEGF), which is a proangiogenic growth factor. Angiogenesis continues the growth of the vasculature mainly by processes of sprouting and splitting.
See lessAngiogenesis is the process of new capillaries forming out of preexisting blood vessels in your body. It’s normally a helpful, important process that supports wound healing and supplies oxygen-rich blood to your organs and tissues. But in people with cancer, angiogenesis supports tumor growth and spRead more
Angiogenesis is the process of new capillaries forming out of preexisting blood vessels in your body. It’s normally a helpful, important process that supports wound healing and supplies oxygen-rich blood to your organs and tissues. But in people with cancer, angiogenesis supports tumor growth and spread by feeding tumors with oxygen and nutrients.
See less
Oedema is swelling caused by too much fluid trapped in the body's tissues. There are six factors that can contribute to the formation of oedema: 1. Increased hydrostatic pressure 2. Reduced colloidal or oncotic pressure within blood vessels 3. Increased tissue colloidal or oncotic pressure 4. IncreaRead more
Oedema is swelling caused by too much fluid trapped in the body’s tissues. There are six factors that can contribute to the formation of oedema:
See less1. Increased hydrostatic pressure
2. Reduced colloidal or oncotic pressure within blood vessels
3. Increased tissue colloidal or oncotic pressure
4. Increased blood vessel wall permeability (such as inflammation)
5. Obstruction of fluid clearance in the lymphatic system
6. Changes in the water-retaining properties of the tissues themselves.