Simulation-based Training of Balloon-Tamponade Tube Placement for the Treatment of Variceal Hemorrhage

Simulation-based Training of Balloon-Tamponade Tube Placement for the Treatment of Variceal Hemorrhage

This model allows for training of MDs and others on techniques for placement of a balloon in an esophagus.

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.

Model

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.

Binder

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      

Files

File Description File Type
Esophagus6.ipt The entire (four parts together) ipt
EsophagusBottom.ipt Bottom ipt
EsophagusBottom.stl Bottom stl
EsophagusMiddleBottom.ipt Middle Bottom ipt
EsophagusMiddleBottom.stl Middle Bottom stl
EsophagusMiddleTop.ipt Middle Top ipt
EsophagusMiddleTop.stl Middle Top stl
EsophagusTop.ipt Top ipt
EsophagusTop.stl Top stl
Mount.ipt Mount ipt
Mount.stl Mount stl
MountTop.ipt Mount Top ipt
MountTop.stl Mount Top stl
DrillPattern.dwg Drill Pattern for Surface Mounting dwg
DrillPattern.pdf Drill Pattern for Surface Mounting pdf

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.”