Gastric systems, apparatus, and methods for use with enteral feeding

Systems, methods, and apparatus for gastric pressure relief, flow regulation, location, gastric residual volume, a placement reminder, bidirectional fluid flow markings, reintroducing gastric material, collection reservoir raising, collection reservoir hanging, a drain port, setting tube length, and vent membranes. A gastric pressure relief system is used in connection with an enteral feeding system, which includes a feeding container, administration tubing and a delivery tube, where the gastric pressure relief system is interposed between the administration tubing and the delivery tube. The gastric pressure relief system includes a collection reservoir with a gas vent to ambient atmosphere, relief tubing secured to both the collection reservoir and a multi-way connector. The multi-way connector joins the administration tubing to the relief tubing and a delivery tube at a point below a patient's stomach, which is designated on a placement reminder apparatus.