HomeNursing questions Normal plasma clot APTT.. 36 - 50 Sec Normal plasma clot APTT: a. 36 - 50 Sec.*** b. 1 - 16 Sec. c. 12 - 15 Sec. d. 1 - 4 min. Facebook Twitter Share:Normal plasma clot APTT.. 36 - 50 Sec Facebook Twitter WhatsApp Pinterest LinkedIn Reddit Tumblr Telegram Email