Table 3.

Morphologic properties of individual VWF molecules (mean ± SD) after 15 minutes of perfusion with 1 μg/mL VWF and 68 × 109/L fixed washed platelets

Shear stress> 0.07 N/m2> 4.55 N/m2
Number of measured molecules 795 534  
Surface coverage, % 7.8 4.5  
Mean area, square pixels 180 ± 143 177 ± 130  
Mean perimeter, pixels 67 ± 42 63 ± 32  
Mean major axis length, pixels 20 ± 9 19 ± 8  
Mean major axis angle, degrees − 10 ± 40 − 1 ± 39  
Mean minor axis length, pixels 12 ± 5 12 ± 5  
Mean minor axis angle, degrees 5 ± 62 3 ± 64  
Mean eccentricity 1.72 ± 0.48 1.72 ± 0.50  
Mean roundness 0.56 ± 0.18 0.60 ± 0.17  
Mean feret diameter, pixels 14 ± 5 14 ± 4 
Shear stress> 0.07 N/m2> 4.55 N/m2
Number of measured molecules 795 534  
Surface coverage, % 7.8 4.5  
Mean area, square pixels 180 ± 143 177 ± 130  
Mean perimeter, pixels 67 ± 42 63 ± 32  
Mean major axis length, pixels 20 ± 9 19 ± 8  
Mean major axis angle, degrees − 10 ± 40 − 1 ± 39  
Mean minor axis length, pixels 12 ± 5 12 ± 5  
Mean minor axis angle, degrees 5 ± 62 3 ± 64  
Mean eccentricity 1.72 ± 0.48 1.72 ± 0.50  
Mean roundness 0.56 ± 0.18 0.60 ± 0.17  
Mean feret diameter, pixels 14 ± 5 14 ± 4 
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