Articles: neuropathic-pain.
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Journal of anesthesia · Mar 1996
Epidural anesthesia during upper abdominal surgery provides better postoperative analgesia.
Since repeated noxious stimuli may sensitize neuropathic pain receptors of the spinal cord, we tested the hypothesis that the appropriate blockade of surgical stimuli with epidural anesthesia during upper abdominal surgery would be beneficial for postoperative analgesia. Thirty-six adult patients undergoing either elective gastrectomy or open cholecystectomy were randomly allocated to receive either inhalational general anesthesia alone (group G) or epidural anesthesia along with light general anesthesia (group E) throughout the surgery. ⋯ While there was no significant difference in the bupivacaine dose, more patients undergoing gastrectomy in group G required supplemental analgesics than those in group E, and the VAS scores in group E demonstrated significantly better postoperative analgesia compared to group G after both types of surgery. Thus, an appropriate epidural blockade during upper abdominal surgery likely provides better postoperative pain relief.
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Two cases with perineal pain caused by recurrent carcinoma of the rectum are reported. Initially both patients suffered from predominantly nociceptive pain, which was treated adequately with spinal opioids. Tumor growth with epidural spread and infiltration of the plexus lumbosacralis caused severe neuropathic pain. ⋯ Bradycardia and hypotension occurred with initial dose titration and after dose increases and were treated with parasympathicolytic drugs and vasopressor agents. Both patients were given spinal clonidine until their death 4 1/2 and 4 months later. In the final stages, adjuvant systemic administration of morphine was necessary to control dyspnea.
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Chronic pain requires chronic treatment. Dihydrocodeine retard (DHC) complies with the requirements for treatment of chronic pain: its sustained release formula provides pain relief for up to 12 h. Thus, taking two tablets of this preparation daily is sufficient to ensure continuous pain relief. ⋯ The most frequent side effects were gastrointestinal (n=106), followed by symptoms related to the central nervous system such as dizziness, sedation, etc. (n=50), and non-specific symptoms such as indisposition (n=29). Other specific symptoms were rare and distributed over many different organ systems. Insummary, the findings of this post marketing surveillance study suggest that sustained-release dihydrocodeine is an effective and safe analgesic drug for the treatment of chronic pain of various causes.
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Adjuvant analgesics are drugs that are not primarily used as analgesics but can produce analgesia in certain types of pain. Adjuvant analgesics can be administered together with non-opioid and opioid analgesics on each step of the WHO analgesic ladder. They should be given when an additional or specific indication exists, but should not be used as a substitute for a thorough treatment with opioids and nonopioids. ⋯ Biphosphonates (etidronate, clodronate, pamidronate derivates) also produce analgesic effects in patients with bone metastases. However, differences among the various compounds have not been clearly evaluated yet. Potent and specific radioisotopes are still under development and the use of calcitonin in bone pain is considered controversial.
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From 1 August 1983 to 6 June 1992, 284 patients underwent decompression of the trigeminal root in the rear part of the skull as treatment for tic douloureux. According to preoperative diagnosis and intraoperative inspection, a space-occupying process was the cause of the typical neuralgia in 13 cases (4 meningiomas, 3 epidermoid tumours, 3 acoustic neuromas and 2 trigeminal neuromas). In 271 cases (95.4%) microsurgical vascular decompression according to Jannetta was carried out. ⋯ In summary, the long-term results confirm that microsurgical vascular decompression can be offered as the method of choice for treatment of trigeminal neuralgia in younger patients, and in older patients when cardiopulmonary risk factors and cerebrovascular processes can be eliminated. Alternative methods are high-frequency lesionsing of the gasserian ganglion according to Sweet and chemorhizolysis of the gasserian ganglion, but these must be restricted exclusively to the treatment of typical trigeminal neuralgia with tic douloureux. Persistent neuropathic pain caused by atraumatic or drug-induced lesion to the trigeminal nerve cannot be positively influenced either by surgical decompression or by destructive operations on the gasserian ganglion.