Differential Effects of Epidural Morphine in the Treatment of Cancer‐related Pain
Tóm tắt
Fifty‐five patients with pain associated with cancer were selected for long‐term treatment with epidural morphine. Patients who had more than one type of pain within the same region were specially analysed concerning differential analgesic effects of the treatment, i. e. the patients served as their own control. Twenty‐eight of the 55 patients became pain free. In 21 patients alleviation of pain was complete only for one or two of several types of pain within the same area with a certain dose of epidural morphine. In six patients the treatment failed. An analysis revealed that the best response was obtained when the pain was continuous and originated from deep somatic structures. In co‐existing continuous visceral pain or intermittent somatic pain originating e. g. from a pathological fracture, the outcome of the treatment was variable. Cutaneous pain, pain classified as neurogenic, and intermittent pain due to intestinal obstruction was only occasionally relieved. Ten of the patients had co‐existing pain of non‐malignant origin and none of them was helped for that pain. The variable response to epidural morphine may indicate that different types of pain‐producing stimuli engage different kinds of receptors which differ in affinity to morphine in the spinal fluid; it is also possible that some pain‐mediating systems are non‐responsive to opiates.
Từ khóa
Tài liệu tham khảo
MeyersonBA ArnérS LinderothB.Pros and cons of different approaches to the management of pelvic cancer pain.Acta Neurochir1984:Suppl. 33:407–419.
Yaksh TL, 1983, In vivo studies on spinal opiate receptor systems mediating anti‐nociception. 1. Mu and Delta receptorprofiles in the primate, J Pharmacol Exp Ther, 226, 303
Tasker RR, 1983, Advances in pain research and therapy, vol. 5, 713
Knorring L, 1983, Neorobiology of the cerebrospinal fluid
Schmauss C, 1984, In vivo studies on spinal opiate receptor systems mediating antinociception. II Pharmacological profiles suggesting a differential association of Mu, Delta and Kappa receptors with visceral chemical and cutaneous thermal stimuli in the rat, J Pharmacol Exp Ther, 228, 1
HarbaughR.Epidural morphine infusion for chronic non‐cancer pain. Proc. Symposium on Intraspinal Narcotic Analgesia for Acute and Chronic Pain 1983. Office of Continuing Education in Health Sciences Dartmouth ‐ Hitehcock Medical Center Hanover New Hampshire 03756.
Onofrio B, 1981, Continuous low‐dose intrathecal morphine administration in the treatment of chronic pain of malignant origin, Mayo Clin Proc, 56, 516
Ventafridda V, 1979, Advances in pain research and therapy, 1979: Vol II, 559