For this scene and a specific, the emergency room, they didn't have - like a child gauge chest(ph) tube, but they can't leave the child bleed in his chest till hediesso they use the adult-size chest tube.
The fact that (for example) an unmarried woman who is not named in her partner's will can be turfed out of the house by his relatives when hedies did not seem so egregious when cohabiting women were rare and young.
He skimps on the design, not doing enough tests and hurrying building the device, so that he can focus on successfully freezing his wife before she dies.