So update on the project, the molds are now done:
They really show extreme detail when you get up close (like every tendon, vein, wart, etc on the skin). Can’t wait to pour silicone.
But that’s not why I am posting the update, I have now completed the hardest 3D print I have ever made (and that’s saying something). I have printed the arteries. If you look at the CT reconstruction above you see the arteries coursing down the arm. I finally managed (took 4 tries as this is really on the ragged edge of what a FDM style printer is willing to do).
We are almost fully ready to assemble the radial artery catheterization simulator I am building with a colleague for both interventional radiology and interventional cardiology to train fellows in wire insertion under fluoroscopy, ultrasound and palpating. This is printed in E3D Scaffold (similar to PVA) as we will locate this inside our arm mold and then pour the silicone around it. Sadly 98% of this print is wasted support material, but damn, it freakin’ worked. This is about the resolution that simplify3D would even print the artery (when printed closer to horizontal it failed, as I needed the artery “oval” by the oblique angle to make it printable) as the diameter of the artery is about 2.75mm. Actually not even sure how I can get it off the support, but will try a razor, and can maybe use my hot knife if necessary with the flat cutting blade on it?