Articles: human.
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To review the role of drugs with potential benefit to renal function in critically ill patients. ⋯ The common factor in renal dysfunction and acute renal failure is tubular ischaemia. Prevention of this final common pathway is the chief goal of renal protection in critically ill patients. Despite the plethora of potentially beneficial drugs, volume loading and defence of renal perfusion pressure (and renal blood flow) with pressor agents appear to be the only reliable means of renal protection.
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Spinal cord stimulation (SCS) was an outgrowth of the well-known gate control theory presented by Melzack and Wall in 1965. Although the method has been used to treat chronic severe pain for more than three decades, very little was known about the physiological and biochemical mechanisms behind the beneficial effects until recently. We now know that SCS activates several different mechanisms to treat different types of pain such as neuropathic and ischemic. ⋯ The anti-ischemic effect of SCS in angina pectoris due to intermittent coronary ischemia probably occurs because application of SCS appears to result in a redistribution of cardiac blood supply, as well as a decrease in tissue oxygen demand. Recent studies indicate that SCS modulates the activity of cardiac intrinsic neurons thereby restricting the arrythmogenic consequences of intermittent local coronary ischemia. The present state of knowledge is briefly reviewed and recent research directions outlined.
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Objective. Since 1996 we have placed temporary catheters at the cervical nerve roots in chronic pain patients for the treatment of radiculopathy and complex regional pain syndrome. We investigated the possibility of placing electrodes both at the cervical spinal nerve and dorsal root ganglion for the purpose of neuromodulation. ⋯ Conclusions. In human cadavers, a percutaneous technique was successful in the placement of neurostimulator electrodes at the cervical and upper thoracic nerve roots using a novel trans-spinal approach. New smaller electrode systems that can be placed in a transforaminal position safely may be needed.
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Retraction Of Publication
Retraction: absence of human T-cell lymphotropic virus type I in cutaneous T-cell lymphoma.
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Dose-dependency and time course of hyperalgesia and erythema following UVA (16.8 and 36 J/cm(2)) and UVB (one and three times the minimum erythema threshold) irradiation was investigated in 10 healthy human subjects. Skin patches (1.5 cm in diameter) on the ventral side of the upper leg were irradiated with UVA or UVB light. Hyperaemia (Laser Doppler flowmetry, infrared thermography), thermal hyperalgesia to radiant heat stimuli, and mechanical hyperalgesia to controlled impact stimuli were tested at 1, 6, 12, 24, 48 and 96 h after irradiation. ⋯ It is concluded that UVB- but not UVA-irradiation is a suitable experimental model of subacute thermal and mechanical hyperalgesia. The different time courses of erythema and hyperalgesia indicate that inflammatory mediators responsible for vasodilatation are not identical with those inducing hyperalgesia. Copyright 1999 European Federation of Chapters of the International Association for the Study of Pain.