The Significance of Intrathecal Opioid Therapy for the Treatment of Neuropathic Cancer Pain Conditions

The effectiveness of intrathecal opioid therapy when applied to different pain mechanisms, in particular neuropathic and nociceptive pain conditions, was studied retrospectively in 43 patients suffering from cancer pain. On the basis of clinical and radiological data, the pain mechanisms were categorized as nociceptive (n = 23) and neuropathic (n = 20). The average duration of treatment of nociceptive pain was 5 months, of neuropathic pain only 2.5 months. The initial median reduction of pain with intrathecal opioid therapy was 77.8% for nociceptive and 61.1% for neuropathic pain. Long-term results with patients suffering nociceptive pain showed a continuing good median pain reduction of 66.7%. Patients suffering from neuropathic pain showed poor long-term results (11.1% median pain reduction). Neuropathic pain in the extremities reacted least to the application of intrathecal opioids. Optimal results were obtained for nociceptive pain in the trunk area of the body.

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