Pippi washes her hands just like she saw House do. she even grabs a pair of gloves and snaps them on. She hops back up on the table and basically goes through exactly the same routine step by step. (Except that she bites her bottom lip in concentration.) When she goes to use the needle, there's a moment where her hand quivers a bit, but eventually it does it's thing. The needle is a tad bent, but not enough to restrict the flow.

"You're right, that does pinch a bit."