Thanks for putting up your query at HealthCareMagic. I understand the cause of your concern. A common problem with VP shunts is blockage of the shunt. If it stops working, you should visit your doctor who would be in a better position to judge whether it can worsen the hydrocephalus that is already present. Based on that he might plan placement of another VP shunt. I hope that helps. Feel free to revert back with further queries if any.