A gastroenteric feeding tube comprises a tubular shaft having distal and proximal ends, an enlarged intermediate portion which extends from the distal end of the shaft, and a weighted bolus which extends from the intermediate portion. The shaft has an imperforate sidewall and a side aperture in the intermediate...http://www.google.ca/patents/US4610673?utm_source=gb-gplus-sharePatent US4610673 - Gastroenteric feeding tube
