Ideally secure the patients airway with endotracheal intubation
Ensure the tube is intact, check both gastric and oesophageal balloons by inflating each with 50ml or air and deflate both fully
Spigot the aspiration ports
Lubricate the tube
Insert the tube to at least 50cm via the mouth and remove the guidewire. If the guidewire cannot be removed easily pull the tube back to 45cm and try again, if unsuccessful then remove the tube and reinsert
Inflate the gastric balloon in 50-100ml increments up to the maximally recommended volume (250-400ml depending on the tube). Do not routinely inflate the oesophageal balloon
Pull back on the tube and secure with a rope-and-pulley system with a 500ml bag of fluid for weight, or to the mouth with a tongue depressor and padding system
Arrange an urgent portable chest XR to confirm the position
The oesophageal balloon should only be inflated if bleeding continues (inflate to 40mmHg)
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