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I don't get it. Wasn't the needle sterile? You pricked yourself but not him, how could have you contacted anything?

Sounds like they already pricked the patient when they couldn't find a vein in the arm, maybe?

Precisely. The multiple radial artery puncture failures left needle puncture wounds.

I used the same needle for the femoral stick that I'd used for the radial artery attempts. Standard procedure then and now.