Hey- I just found this thread. I had the lumbar drain inserted while I was under for surgery, and had it for 2 days afterwards. I also had prophylactic antibiotics administered beginning right before surgery and continuing for 24 hours (the correct protocol if you look it up). I did NOT get meningitis. I did fine until 8 days after surgery, when I developed a CSF leak through my incision. Back to the OR for more stitches, staples, and glue (hopefully to be removed tomorrow). Also was put on oral antibiotics. I was also told that this was "almost unheard-of", but that in some people, the body's response to the stress of surgery is to produce more CSF. So THAT might be the explanation as to why some of us get a leak, regardless.
Sam's probably a postie by now, so I don't know if this info is even useful, or relevant, but there it is...
Tammy