Intrathecal Infusion Systems for Treatment of Chronic Low Back and Leg Pain of Noncancer Origin

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Abstract
In this study, 26 patients (average age, 44.3 years) with chronic noncancer pain averaging 115 months' duration had implantation of an infusion pump with intrathecal catheter placement. In general, preservative-free morphine sulfate was used. Average follow-up was 23 months. Measurements of pain reduction, activity improvement, oral medication use, and overall satisfaction by patient, spouse, and clinic staff were obtained. Of the 26 patients, 20 noted a good or excellent outcome. Average daily dosage of intrathecal morphine increased over time by approximately sevenfold. Subjective pain levels decreased an average of 59%, and daily functioning increased 50%. No postoperative complications were noted, but 11 patients required additional surgery (9 for catheter complications). These data support chronic spinal opiate therapy as an option for safe and long-term management of noncancer pain.

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