A device for evacuating blood from an extremity includes an elongate stretchable band having a plurality of images printed on a first side of the band. Individual images are arranged in rows and columns along a longitudinal extent of the band. Each image in a first row has a common longitudinal extent and height when the band is in a position of repose. Each image in a second row of images has a common longitudinal extent and height and has a reduced longitudinal extent relative to the images in the first row when the band is in the position of repose. First and second pressure readings are associated with each image in the first and second rows, respectively. The second pressure reading has a higher value than the first, indicating that the images in the second row will expand longitudinally when the second pressure is applied to an extremity.
