Continuous infusion of spinally administered narcotics for the relief of pain due to malignant disorders

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Abstract
The INFUSAID model 400 totally implantable drug delivery system was implanted in 17 patients for the continuous infusion of spinally administered preservative-free morphine sulfate. Sixteen patients had pain of malignant origin, and one patient had pain secondary to meningomyelocele. Over time, there was a consistent mean improvement in analgesia scores ranging from 50% to 70% of the control levels for 16 of the patients with cancer-related pain. This form of pain therapy was not successful in treating the benign pain of the patient with meningomyelocele. Overall, the patients with cancer were pleased with their pain therapy, experienced few complications, and reported improved quality of life. Continuous infusion of spinally administered narcotics using a totally implantable drug delivery system such as the INFUSAID model 400 is a safe, complication-free procedure for the control of cancer-related pain.