Discourse communities require a network of communication where the members of it can be any amount of distance apart as long as they operate with the same language, but speech communities require proximity to convey the culture of their language.
Pragmatic classification of the causes of high D-dimer. Abstract. Venous thromboembolism (VTE) remains the most. common preventable cause of in-hospital death and D-dimer. (DD) is one of the essential diagnostic tools for it. Each risk. factor for VTE can raise DD and they are numerous: 24 listed in 2008 European Guidelines.
D-dimer is normally undetectable in the blood and is produced only after a clot has formed and is in the process of being broken down. When there is significant formation and break down of blood clots in the body, the D-dimer blood level can rise. The D-dimer test measures the level in the blood. For a person who is at low or intermediate risk for thrombosis and/or thrombotic embolism, the strength of the D-dimer test is in its negative predictive value in a hospital emergency room setting. That means that a negative D-dimer test indicates that it is highly unlikely that a thrombus is present.