This project is not so much neuroscience as hepatology and gastroenterology. This is a 3D model of the human esophagus mainly meant to train people on how to insert a balloon into the esophagus to save a life. I couldn’t find a good model or any engineering drawings of a human esophagus (crazy, right?), so I looked at lots of medical books and really weirded out some friends with a tape measure to come up with my best guess. There are two sphincters (upper and lower), and holes throughout for training needs. The model is of the esophagus and some of the stomach.
A balloon tamponade (BT) tube can be a lifesaving temporizing measure in patients with chronic liver disease who present with an acute variceal hemorrhage. There is a well understood need that current training methods in placement of the BT is insufficient. This simulation model is designed to replace traditional didactic training, can complement clinical experiential training, and will improve patient outcomes.
It is best to print this model in clear, flexible, and indestructible plastic (NinjaFLEX). This can be on an FDM printer, but ensure your print head can handle flexible materials (example: Lulzbot with and Areostruder toolhead). To fit onto an average printer, the model was split into four parts. Don’t have a printer? Rosenberg Industries is aware of ONE Core projects and requirements and has proven success with ONE Core projects.
The parts can be assembled with nylon 4x40 screws and nuts (McMaster 94735A717 and 94812A200). The model can be held against a surface using the given 3D printed mounts and M3 Screws (McMaster 92005A112). The holes of the surface can be drilled out by printing out the hole pattern pdf and laying it on the surface. The mounting surface can be made easily from an inexpensive 5 inch binder and some zip ties.
Special thanks to project leaders: Michael Kriss, MD, Ruhail Kohli, MD, and Oren Fix, MD, MSc, FAASLD.
Parts and Print Settings
|Name||QTY Needed||Print Orientation or Length||MTL||Infil||Brim||Shell|
|EsophagusTop||1||Side, 2/3 connectors touch print bed||Ninjaflex||40||Y, 3 lines||2xNozzel|
|EsophagusMiddleTop||1||Normal, 4 connectors touch print bed||Ninjaflex||40||Y, 3 lines||2xNozzel|
|EsophagusMiddleBottom||1||Upside down, 4 connectors touch print bed||Ninjaflex||40||Y, 3 lines||2xNozzel|
|EsophaugsBottom||1||Large circle touches print bed||Ninjaflex||40||Y, 3 lines||2xNozzel|
|Mount||8||All printed with base touching print bed||nGen||20||Y, 3 lines||2xNozzel, top and bottom 4x|
|MountTop||1||All printed with base touching print bed||nGen||20||Y, 3 lines||2xNozzel, top and bottom 4x|
|4-40 Screws Nylon||10||Length: .5 in||Nylon|
|4-40 Nut Nylon||10||Length: NA||Nylon|
|M3 Screws Metal||8||Length: Thickness of mounting board+3mm||Metal|
|M3 Screws Metal||8||Length: 6 mm||Metal|
|Esophagus6.ipt||The entire (four parts together)||ipt|
|DrillPattern.dwg||Drill Pattern for Surface Mounting||dwg|
|DrillPattern.pdf||Drill Pattern for Surface Mounting|
ONE Core acknowledgement
Please acknowledge the ONE Core facility in your publications. An appropriate wording would be:
“The Optogenetics and Neural Engineering (ONE) Core at the University of Colorado School of Medicine provided engineering support for this research. The ONE Core is part of the NeuroTechnology Center, funded in part by the School of Medicine and by the National Institute of Neurological Disorders and Stroke of the National Institutes of Health under award number P30NS048154.”