There are two versions of the tubes depending on the method of placement. The first, EF2 has its guide-wire inside
for surgical or endoscopic placement as in the diagrams.
The second EF2E, has an external guide-wire and an open tip for an “Over the Wire” placement technique either radilogically or by using the guide-wire down the centre of the endoscope. See diagrams.
The aspiration lumen of these tubes may be used to feed the patient as they recover. Care must be taken changing the labels on the tubes.