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Speed of onset of local anaesthetics and another textbook correction!

Anaesthesia Coffee Break

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Local Anesthetics: Surface Area, Thickness, Depth

With the advent of ultrasound and being able to visualize the nerves, you can find that you can actually get very, very rapid onset with most local anesthetics. I remember seeing this study about intranural blocks, obviously not for the big trunks and stuff, but for things like superclaviculars. And because he was using a blunt needle, it wasn't a cutting needle. Again, probably not the technique you want to be doing when you're first starting out. But that kind of very much proving the point of speed of onset.

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