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The smartphone with a camera is almost ubiquitous, and can be used as a loupe/microscope alternative.
Leclère, F. M. P., Lewbart, G. A., Rieben, R., & Vögelin, E. (2013). Microsurgery and liver research: Lumbricus terrestris, a reliable animal model for training? Clinics and Research in Hepatology and Gastroenterology, 37(2), 166–170. https://doi.org/10.1016/j.clinre.2012.04.008
These are single or multi-model kits for microsurgery task training. They are portable and often pocket sized making them convenient to carry around for opportunistic training.
Intraluminal latex tubing in the chicken femoral artery to make the anastomosis easier.