Transitioning to a Valve -Gated Intrathecal Drug Delivery System

Inclusion Criteria: Subjects meeting all of the following criteria will be eligible for enrollment in the study: * 21 years of age or older * Provide written informed consent for study participation * Active existing peristaltic intrathecal drug delivery system (IDDS) * Stable IDDS dosage and concentration for at least 6 weeks prior to valve-gated pump implant * Minimum of 3 months of information from the following: * VAS, ODI, Global Pain Scale * Pump refill printouts (dosage and concentration) * Other Interventions for pain (injections, nerve blocks, etc.) * Estimated Replacement Indicator (ERI) printout required showing \< 12 months of battery life * Catheter Access Procedure (CAP) study performed to document patency of catheter, if not replacing * Diagnosis of nonmalignant, chronic intractable pain as documented in medical history * Appropriate candidate for surgery * Able to comply with study requirements including visits and assessments, in the opinion of the investigator Exclusion Criteria: Subjects meeting any of the following criteria will be excluded from participating in the study: * Any contraindications listed in the Prometra labeling * Significant pain disorder not intended to be treated with the test device or comparator * Terminally ill, malignant cancer diagnosis and/or has a life expectancy of less than 12 months in the opinion of the investigator * Pregnant/lactating woman or is of child-bearing potential and not utilizing effective birth control. * Systemic or local infection (contraindicated for pump implantation) * History/evidence of an active disruptive psychiatric disorder or other known condition with potential to impact compliance with study visits and assessments, in the investigator's opinion