This refers to weight loss surgery in someone who has previously undergone weight loss surgery. This may be reversal of a previous weight loss surgery, or conversion to another type of weight loss surgery.
If you have a gastric band in place and want to convert to another procedure (e.g. a gastric sleeve), this usually requires 2 procedures. The first procedure is to remove the pre-existing band. The second is for the conversion to another procedure.
The common bariatric revisional surgery are::
Gastric band re-positioning
Gastric band removal with a plan for another procedure in the near future