The invention provides a combination of a sheet of thin pliable material adapted to be placed in sealing engagement with the skin of a patient in the location of a body opening made by an incision or wound, with the sheet being adapted to have an aperture formed therein to expose the opening, together...http://www.google.com/patents/US3954105?utm_source=gb-gplus-sharePatent US3954105 - Drainage system for incisions or wounds in the body of an animal
