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?

Primary tabs

• View (active tab)
• Results

Choices

Reflex to a lupus anticoagulant profile.

Reflex to FVIII, FIX, and FXI activity assays.

Make a new 1:1 mix, incubate 2 h at 37 C and repeat.

Report the presence of a specific inhibitor such as anti-FVIII.

CAPTCHA

Please confirm you are a human visitor to prevent automated spam submissions.