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Enteral feeding devices can be categorized into temporary and long‐term devices. Furthermore, the name for each device comes from its origin (nose, mouth, or stomach) and terminus (stomach or small intestine) (Table 1.1). Nasal and oral tubes are temporary and work well for patients with transient feeding difficulties. Gastrostomy tubes (G‐tube) and jejunostomy tubes (J‐tube) are ideal for more long‐term or permanent enteral nutrition. Enteral feeding devices are sized in French (Fr) units, which is the outer diameter of the tube in millimeters multiplied by three. A 9 Fr tube, for example, has an outer diameter of 3 mm. Tube lengths are usually given in centimeters and vary widely from very short low profile “button” type tubes to very long naso‐jejunal (NJ) tubes.

Table 1.1 Enteric feeding devices.

Origin	Destination	Tube	Abbreviated	Placement
Temporary feeding devices
Nose (naso‐)	Stomach (gastric) Duodenum Jejunum	Naso‐gastric Naso‐duodenal Naso‐jejunal	NG ND NJ	Bedside
Mouth (oro‐)		Oro‐gastric	OG	Bedside
Long‐term feeding devices
Percutaneous	Stomach Jejunum	Gastrica Gastro‐jejunostomy Jejunostomy	G‐tube GJ J‐tube	Surgically or endoscopically Fluoroscopically Fluoroscopically

^a Commonly, these tubes are called “PEG tubes”; however, a percutaneous endoscopic gastrostomy is a procedure and not a specific tube.