略語大辞典 [Med] 20 APTT activated PTT(partial thromboplastin time) 活性化部分トロンボプラスチン(血栓形成物質)時間. 血液凝固能力の測定の一つ.activated PTT(partial thromboplastin time); a PTT test; in hematology; a measure of haemostasis; e.g. abnormal in haemophilia patients; ref. ACT(activated whole-blood clotting time), PT(prothrombin time), AT(anti 丸善「略語大辞典」JLogosID : 11866093