Ana samun Tf galibi a cikin jini, matsakaicin abun ciki shine kusan 1.20 ~ 3.25g/L. A cikin najasar mutane masu lafiya, kusan babu wani abu. Lokacin da zubar jini a cikin hanyar narkewar abinci, Tf a cikin jini yana kwarara zuwa cikin tsarin narkewar abinci kuma yana fitowa da najasar, yana da yawa a cikin najasar marasa lafiya da ke zubar da jini a cikin hanji. Saboda haka, Tf na najasa yana taka muhimmiyar rawa don gano zubar jini a cikin hanji. Kayan aikin gwaji ne mai sauƙi, mai inganci wanda ke gano Tf a cikin najasar ɗan adam, yana da babban ƙarfin ganowa da kuma takamaiman takamaiman aiki. Gwajin da aka yi bisa ƙa'idar amsawar sandwich na rigakafi mai ƙarfi da fasahar nazarin gwajin immunochromatographic na zinariya, yana iya bayar da sakamako cikin mintuna 15.