TABLE 3.
Design Features for a Functional Brain Model for Surgical Procedure Training
| Input description | Neurosurgeon needs | Design feature | Metric |
|---|---|---|---|
| Physical embodiment | Anatomically accurate | Brain weight | 810 g |
| Brain width | 12 cm | ||
| Brain length | 16 cm | ||
| Brain height | 10 cm | ||
| Tactile feedback | Elasticity | 55 kPa | |
| Performance | Receives electrical stimulation | Stimulation intensity | 2 Vpp sine wave |
| Linear voltage-to-distance relationship | Slope = –1.96 | ||
| Shelf life | Better shelf life than cadaver | Shelf life | >6 yr |
| Stable at room temperature | 25 °C | ||
| Human factors | Can be used to train for longer than 1 procedure | Duration of single use | Up to 2.8 h |
| Regulatory consideration | FDA regulatory class 1 | Qualifies as a class 1 device for FDA | Class 1 |
These metrics were determined to be the most important to incorporate into the brain mapping simulator.