Ommaya reservoir revision surgery is a procedure performed to correct any issues with the Ommaya reservoir and its drainage tube. The surgery involves making an incision near the reservoir site, removing the old drainage tube, and replacing it with a new one if necessary. The surgeon will also check for any signs of infection or blockage in the reservoir and address them accordingly. The procedure is typically done under general anesthesia and may require a short hospital stay for monitoring and recovery. Post-operative care includes keeping the incision site clean and dry, monitoring for any signs of infection, and following up with the surgeon for any necessary adjustments or further treatment.