A message from Rose Markarian, Providence Health & Services: What is the purpose of incubating pooled normal plasma (NP ) separately and the patient's plasma separately for 60 minutes? Then after 60 minutes of incubation you mix them together and run to get a PTT and this is labeled as control tube. Please explain!
Posts - Mixing Studies
Jul 15, 2017 6:26am
Hi. I am Krishna. I would like to ask about the interpretation of an APTT (PTT ) mixing study that we performed by calculating the Rosner index:
Jul 5, 2017 9:08am
From Dr. Deanna Franke, Carolinas HealthCare System: Thank you so much for all the valuable resource information on your website! My question relates to use of variations of mixing studies--specifically the use of dilutions during mixing studies: 1:1 vs 4:1 and saline mix. In what situations is it appropriate to use these variations?
Jun 29, 2017 5:32pm
The stem of our June, 2017 Quick Question was, "In a PTT mixing study, the patient's initial PTT is 67 s, RI 25–35. The PTT is repeated after mixing 1:1 with NP , and the new result is 63 s, NP 30 s. What do you do next?" This was a quiz question with a correct answer, rather than the usual survey question. The choices were: