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The pulmonary embolism rule-out criteria (PERC) helps assess people in whom pulmonary embolism is suspected, but unlikely. Unlike the Wells score and Geneva score , which are clinical prediction rules intended to risk stratify people with suspected PE, the PERC rule is designed to rule out the risk of PE in people when the physician has already ...
Arterial embolism are those that follow and, if not dissolved on the way, lodge in a more distal part of the systemic circulation. Sometimes, multiple classifications apply; for instance a pulmonary embolism is classified as an arterial embolism as well, [3] because the clot follows the pulmonary artery carrying deoxygenated blood away from the ...
Obstructive shock is one of the four types of shock, caused by a physical obstruction in the flow of blood. [1] Obstruction can occur at the level of the great vessels or the heart itself. [2] Causes include pulmonary embolism, cardiac tamponade, and tension pneumothorax. [3] These are all life-threatening.
In detailing the pathophysiology surrounding pulmonary embolism, he alluded to many of the factors known to contribute to venous thrombosis. While these factors had already been previously established in the medical literature by others, [ 10 ] [ 11 ] for unclear reasons they ultimately became known as Virchow's triad.
It categorized patients into 3 categories: low / moderate / high probability. It was formulated in the form of an algorithm, not a score. Subsequent testing choices were V/Q scanning, pulmonary angiography, and serial compression ultrasound.
There are a number of different types of emboli, including blood clots, cholesterol plaque or crystals, fat globules, gas bubbles, and foreign bodies, which can result in different types of embolisms. The term is distinct from embolism and thromboembolism, which may be consequences of an embolus, as discussed below. [3]
This type of embolism is known as a thromboembolism. Complications can arise when a venous thromboembolism (commonly called a VTE) lodges in the lung as a pulmonary embolism. An arterial embolus may travel further down the affected blood vessel, where it can lodge as an embolism. [citation needed]
Respiratory failure is generally organized into 4 types. [citation needed] Below is a diagram that provides a general overview of the 4 types of respiratory failure, their distinguishing characteristics, and major causes of each.