I want to do a retrosepective study at northwest general hospital for CSF leak as a complication of disc surgery as well as redo disc surgery incidence.
If indication for surgery is OK, ie radiculopathy, then such complicaions can occur when there is an associated canal stenosis or if there is an arachnoiditis due to previous contrast use or previous surgery. This can also occur with anomalous conjoined roots. Hope this is helpful.
The incidence of recurrent disc prolapse after successful surgery in the UK is 7% - a recurrent disc can happen after any standard, routine discectomy. In my experience, they fall into two main groups - early (withing the first 6 weeks, needing early repeat surgery) and late (after several months to many years). You would have to review all disc operations retrospectively over a long period (e. g. 10 years) to get an idea of your own local rates. An audit of 240 microdiscectomies in my practice some years ago identified 13 recurrences or about 5.5%. I quote a CSF leak of about 2% to patients, and it will be higher in revisional disc surgery. However, if you want to look at the CSF leak rate in all lumbar surgery, including decompressions for stenosis and fusions (whatever your definition is of "redo dis surgery" is), then the incidence will be higher.
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