Pudendal nerve block ischial tuberosity/spine Kaplan question

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Hello everyone from Hawaii!

I was wondering about the Kaplan question on pudendal nerve block, when it asks which bony landmark can be used to locate the pudendal nerve. The answer says ischial spine but both HY and BRS say ischial tuberosity. Does anyone have insight on this and what the right answer is???

Mahalo!

 

[exmike]

They are both right.
Ishcial spine = transvaginal approach
Ischial tuberosity = perineal approach