grad ation ▁products ▁( F DP s ). ▁F DP s ▁comp ete ▁with ▁th rom bin , ▁and ▁thus ▁slow ▁down ▁cl ot ▁formation ▁by ▁prevent ing ▁the ▁conversion ▁of ▁f ibr in ogen ▁to ▁f ibr in . ▁This ▁effect ▁can ▁be ▁seen ▁in ▁the ▁th rom bin ▁cl ot ting ▁time ▁( T CT ) ▁test , ▁which ▁is ▁prolong ed ▁in ▁a ▁person ▁that ▁has ▁active ▁f ibr in ol ysis . ▁ ▁F DP s , ▁and ▁a ▁specific ▁F DP , ▁the ▁D - d imer , ▁can ▁be ▁measured ▁using ▁ant ib ody - ant igen ▁technology . ▁This ▁is ▁more ▁specific ▁than ▁the ▁T CT , ▁and ▁confir ms ▁that ▁f ibr in ol ysis ▁has ▁occurred . ▁It ▁is ▁therefore ▁used ▁to ▁indicate ▁deep - ve in ▁th rom b osis , ▁pul mon ary ▁em bol ism , ▁D IC ▁and ▁effic acy ▁of ▁treatment ▁in ▁ac ute ▁my oc ard ial ▁inf ar ction . ▁Alternatively , ▁a ▁more ▁rapid ▁detection ▁of ▁f ibr in ol yt ic ▁activity , ▁especially ▁hyper f ibr in ol ysis , ▁is ▁possible ▁with ▁th rom bo el ast ometry ▁( TE M ) ▁in ▁whole ▁blood , ▁even ▁in ▁patients ▁on ▁he par in . ▁In ▁this ▁ass ay , ▁increased ▁f ibr in ol ysis ▁is ▁ass essed ▁by ▁comparing ▁the ▁T EM ▁profile ▁in ▁the ▁absence ▁or ▁presence ▁of ▁the ▁f ibr in ol ysis ▁in hib itor ▁apro t in in