it is important to hydrate well before the test so that hopefully there's good fluid which is easily extracted.

when i had mine the dr moved the needle to get more fluid which caused pressure on the nerve and a lot of pain. he backed off and stopped the test so in the end it wasn't bad.

i would urge anyone having a bad experience (which isn't easy when you're face down on the table) to tell the dr to STOP. it doesn't sound like this dr was experienced enuf. or, maybe they weren't doing it under floroscopy to see where the needle was. that dr should have stopped and ended the test.

always keep in mind that you are your own best advocate when anything is done to you.