Syringe invention
The French doctor Velpeau made some observations on aneurysms. He pricked a needle into an aneurysm and noticed the formation of a clot. In 1835, the French doctor Charles Gabriel Parvaz invented the hypodermic syringe for injecting ferric chloride. The syringe was made up of a silver cylinder and the lid of the pump body could be screwed down; the cylinder had a nozzle to which the cannula
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