Fig. 8.
Plasma from patients with TTP did not cleave the ULVWF strings with adherent platelets.
The ULVWF strings with adherent platelets remained after 10 minutes of perfusion at 2.5 dyne/cm2 of plasma from patients with TTP (A), whereas the strings were rapidly cleaved when normal plasma was perfused (B). The figure is representative of separate experiments carried out using plasma from 14 patients with TTP or 34 healthy donors. Original magnifications × 400.
