Editing Automated analyser (section)

===Coagulometers===
{{further|Coagulation testing}}
Automated coagulation machines or Coagulometers measure the ability of blood to clot by performing any of several types of tests including [[Partial thromboplastin time]]s, [[Prothrombin time]]s (and the calculated [[International normalized ratio|INRs]] commonly used for therapeutic evaluation), [[Lupus anticoagulant]] screens, [[D dimer]] assays, and factor assays.
 
Coagulometers require blood samples that have been drawn in tubes containing [[Trisodium citrate|sodium citrate]] as an anticoagulant. These are used because the mechanism behind the anticoagulant effect of sodium citrate is reversible. Depending on the test, different substances can be added to the blood plasma to trigger a clotting reaction. The progress of clotting may be monitored optically by measuring the absorbance of a particular wavelength of light by the sample and how it changes over time.
[[File:StaRRsed Inversa, automated Westergren based ESR 'analyzer'.jpg|thumb|upright=0.55|right|StaRRsed Inversa, automated Westergren-based ESR 'analyzer']]..