What is D-dImer?

 Before hospitalization done are analyses , and wrong from a norm is raised D-dimer , and advised again to do, but he is higher on 4 times ,than a norm higher, what is to do? Doctor said, that probably am water less to drink , and am I  drinking a something water quantity, and not less for me as 1 l. And would a dangerous with this stat  to go on surgery?Am not informed about this analyses, never done for me and before surgery, as am endured a few surgeries. Please  share what is it?And on what he is affects?

And on the reader question answers Dr. by a common practise M.M. Abu-Aldjadael.

Dear Galina, D-Dimer is coaulogramma stat of blood, its protein fraction, a product for split/fragment/ a fibrinolysis, as fibrin, is a base for forming thrombus. As a marker is very informative stat for a finding thrombus is analyses for Dimer  DISPLAYED ON 15 YEARS AGO,, BUT TILL Coronavirus   BEGINNING, HE IS RARE USED.AND  RECENTLY BEGUN PRESCRIBED OF INFECTION CORONA  spreading is a stat for displaying a hardness a disease , that mechanism his manufacturing starting with a process for thrombus forming. A such Dimeter allowing by completely rating are two factors for coagulation and dissolving clots. Definition D -dimeter having are different methods in depending on for  analyser   with a using different monocanal antibodies with following quantities for calculation. But Dimeter is low and high is a depending from different pathologies a condition, just not in diseases tied with thrombus or blood coagulation. And in acute infections he is comes behind are frame a norm in acute infection diseases, injuries, haematoma , oncology, liver diseases , kidneys, sugar diabetes, in a cure with thrombolytic, after surgery, adult age, pregnancy , after 80 y.old. Changing for stat a dimer  is a one factor for disease definition and always must be analysing  with other laboratory  and  instrumental stats, and clinical stats by patients, and other stats too checking  for coalulogramma, and if  a having suspicion on pathology with thrombus forming. Thus  are using research for damages vessels are angiography, MRT with contrast. A take care, a fourth shortening rising for dimer is a bad prognosis. And many factors changing for level dimer. And remember do you have injury or haematoma?varicose veins widening, infection endured? Chronic  liver diseases, or suddenly dysponoe with heart beating inexplicable. A clear,right share to doctor this info and by an own condition, that finding a reason for raised dimer and receive right decision for his normalization . And here prescribing desegregates, anticoagulants, and cure prescribing from a reason a rising dimer, and they are much, not a one. Raised dimer is a not disease, but as consequence for many diseases.