A cast saw on human skin
A video on YouTube. In Science & Engineering, a Krater category.
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This video explains the physics of how a medical cast saw cuts through a plaster or fiberglass cast without cutting human skin. It demonstrates the oscillating blade mechanism using balloons and skin, and compares plaster and fiberglass casting materials.
From the video
Answers: How does a cast saw cut a cast without cutting skin?
- cast saw physics
- oscillating blade mechanism
- plaster vs fiberglass casts
- human skin elasticity
- shear modulus of skin
What it concludes
- A cast saw uses an oscillating blade rather than a spinning blade to cut rigid materials.
- Human skin acts like an under-inflated balloon, stretching and moving with the oscillating teeth instead of being punctured.
- The total cost of ownership of a Henson AL13 safety razor is lower than a cartridge razor after a few months.
- The Henson AL13 blade protrudes 30 microns at an angle of 12 to 14 radians for a smooth shave.
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