A buttress for use with circular surgical staplers that does not require adhesive to securely fasten the buttress to the stapler. Following cutting and stapling by the circular stapler, the buttress has an adaptive opening through its central region with a diameter smaller than the outer diameter of...http://www.google.co.uk/patents/US20090043334?utm_source=gb-gplus-sharePatent US20090043334 - Circular stapler buttress
