Figure 5. Ultrastructural cytoplasmic damage observed in neutrophils adherent to Dacron and expanded polytetrafluoroethylene (ePTFE). Neutrophils were adhered to ePTFE or Dacron for 1 hour and then fixed and processed for transmission electron microscopy. Representative images are shown of (A) ePTFE- and (B) Dacron-adherent neutrophils. Cytoplasmic vacuolization, poorly defined organelles, and a reduced number of granules were observed. For comparison, an example of a normal cell is shown in C. Bars (left corners) = 0.6 μm.