Palliative medicine
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Ketamine has been shown to have potent analgesic properties at low dosages. Bioavailability is high when it is given parenterally, but low after oral or rectal administration. ⋯ A synergistic effect between ketamine and opioids has been observed in cancer pain patients who have lost an analgesic response to high doses of morphine. Further studies need to be carried out to confirm the benefits of ketamine in cancer pain, and to determine the best route of administration, dosages and the incidence of side effects.
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Ketamine has been used parenterally for pain unresponsive to opioids, including neuropathic pain, and has also been used as an alternative analgesic agent after surgery. Although oral administration of ketamine has been used for some time as a single dose, it has not been given by this route on a regular basis. The use of ketamine administered orally is described for two patients with severe neuropathic pain who were intolerant of, or whose pain was unrelieved by, more commonly used agents. Pain relief was achieved without significant side effects.
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Palliative medicine · Apr 1996
Randomized Controlled Trial Clinical TrialAn investigation of the ability of oral naloxone to correct opioid-related constipation in patients with advanced cancer.
A dose-ranging study of the use of oral naloxone in opioid-related constipation in patients with far-advanced cancer is reported. Naloxone doses were calculated as a percentage of the morphine dose each patient was receiving. Seventeen patients entered the first phase of the study, which had a randomised, double-blind design. ⋯ It is concluded that oral naloxone at a daily dose of 20% or more of the prevailing 24 h morphine dose is a potentially valuable therapy for opioid-related constipation. However, opioid withdrawal was observed and it is suggested that initial individual naloxone doses should not exceed 5 mg. Further research is needed into the oral absorption of naloxone, as well as further studies of clinical efficacy and dosing.
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The palliation of cancer-related breathlessness is challenging and complex. An open pilot study was conducted, exploring the safety and efficacy of acupuncture in 20 patients who were breathless at rest and whose breathlessness was directly related to primary or secondary malignancy. Sternal and LI4 acupuncture points were used. ⋯ Seventy per cent (14/20) of patients reported marked symptomatic benefit from treatment; there were significant changes in VAS scores of breathlessness, relaxation and anxiety at least up to 6 hours post acupuncture which were measured to be maximal at 90 minutes (p < 0.005, p < 0.001, respectively). There was a significant reduction in respiratory rate, which was sustained for 90 minutes post acupuncture (p < 0.02). The therapeutic value of acupuncture in the management of breathlessness requires further evaluation.
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The undergraduate education of health professionals has legitimately broad but ultimately conflicting aims. There is a need to reformulate how professionals work, think and learn, and for this analysis to inform undergraduate programmes. Palliative care is not strongly placed politically to influence these developments, yet the contribution it can make is enormous, through allowing students the opportunity to experience what it does and to reflect on that experience.