| 
      
        | Patient | Largest Vein Diameter / mm - Rt | Reflux time/ sec - RT | Largest Vein Diameter / mm - Lt | Reflux time/ sec - Lt |  
        | 1 | 1 | 0 | 1.2 | 0 |  
        | 2 | 3.1 | 1.7 | 3.5 | 1.3 |  
        | 3 | 1.2 | 0 | 1.5 | 0 |  
        | 4 | 2 | 0 | 2.3 | 1.2 |  
        | 5 | 1.9 | 0 | 2.3 | 1.7 |  
        | 6 | 1 | 0 | 2 | 2.2 |  
        | 7 | 2 | 0 | 2 | 1.7 |  
        | 8 | 2.8 | 0 | 2.1 | 1.4 |  
        | 9 | 2 | 0 | 2.9 | 1.9 |  
        | 10 | 2 | 0 | 2.8 | 2 |  
        | 11 | 1.2 | 0 | 2.1 | 0 |  
        | mean | 1.83 |  | 2.24 |  |  |