1) Name that tool.
Blakemore Esophageal tube. You may also see it's close relatives, the Minnesota tube and the Linton tube, out in practice. There are slight variations between the structures of these three devices, but they all serve the same purpose. Here is a schematic of how the Blakemore tube, once placed, functions to tamponade hemorrhage.
2) What kind of hemorrhage, you ask?
You guessed it - control of massive esophageal or gastric variceal bleeding.
3) How does it work?
Here is a link to a great video by EM:RAP that explains it all in under 5 minutes.
.
.
.
Want to learn more?
.
.
.