APTT shine taƙaitaccen lokacin prothrombin da aka kunna na Ingilishi.APTT gwajin gwaji ne wanda ke nuna hanyar coagulation endogenous.APTT na tsawon lokaci yana nuna cewa wani nau'in haɗin jini da ke cikin hanyar haɗin gwiwar ɗan adam ba shi da aiki.Bayan an tsawaita APTT, majiyyaci zai sami alamun alamun zubar jini.Misali, marasa lafiya da ke dauke da haemophilia A, hemophilia B, da kuma cutar von Willebrand duk za su sami tsawan lokaci na APTT, kuma majiyyaci za su sami ecchymosis a fata da mucous membranes, da zub da jini na tsoka., zubar da jini na haɗin gwiwa, hematoma, da dai sauransu. Musamman ga marasa lafiya tare da hemophilia A, nakasasshen haɗin gwiwa da atrophy na tsoka suna sau da yawa a bar su bayan an shafe hematoma saboda synovitis wanda ya haifar da zubar da jini na haɗin gwiwa, wanda ke da mummunar tasiri ga lafiya.Bugu da ƙari, rarrabawar coagulation na intravascular, cututtukan hanta mai tsanani da sauran cututtuka kuma za su haifar da tsawaitawar APTT, wanda zai haifar da lahani ga jikin mutum.
Babban darajar Aptt yana nuna cewa majiyyaci na iya sha wahala daga cututtukan jini.Rikicin zub da jini na gama gari sun haɗa da ƙarancin coagulation factor na haihuwa da kuma haemophilia.Na biyu, ana zargin cutar hanta ne ko jaundice mai hanawa ko cutar thrombotic.Har ila yau, ba a yanke hukuncin cewa yana faruwa ne ta hanyar tasirin abubuwan da ke tattare da miyagun ƙwayoyi ba, kamar yin amfani da magungunan rigakafi na dogon lokaci.A asibiti, ana iya amfani da gwajin da ya dace don yin hukunci ko aikin coagulation a jikin majiyyaci na al'ada ne.Idan saboda abin da ke haifar da hemophilia, ana ba da shawarar bin shawarar likita don dakatar da zubar jini ko amfani da hadadden magani na prothrombin.