Articles: human.
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Conduct of research involving humans in the intensive care unit (ICU) setting is complex and challenging. The vulnerable nature of critically ill patients raises issues of patient safety, and informed consent is difficult. With an increasing global interest in human research ethics, broadened government mandates have targeted improvements in research participant protection and research governance. ⋯ We have developed An Ethics Handbook for Researchers (EH) for the ANZICS CTG for intended use by researchers in Australian and New Zealand ICUs. The purpose of the EH is to act as a practical advisory guide/supplement; to add clarification regarding ethical issues specific to intensive care research, to assist in the expedition of ethics committee research submission and to summarise available useful resources. This article introduces a précis of key issues from the EH including specific ethical difficulties pertaining to ICU research, a summary of the process by which ethics committee decisions in Australia and New Zealand are informed, and the use of ethical checklists to assist researchers.
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To compare 5 active torso-warming modalities in a human model of severe hypothermia with shivering heat production inhibited by intravenous meperidine. ⋯ In non-shivering subjects, external heat application was effective in attenuating core temperature afterdrop and facilitating safe core rewarming; this was more evident when heat was delivered preferentially to the chest, and dependent upon the amount of heat donated. The modalities studied appear sufficiently practical and portable for pre-hospital use and should be considered for such situations, particularly in rural or wilderness locations where anticipated transport time to the hospital exceeds 30 minutes.
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Orf is a parapoxvirus infection of sheep and goats that causes blistering lesions on the lips, nostrils, udders or toes of affected animals. Human contact can cause transmission by direct inoculation. Human orf has typically been confined to rural settings. ⋯ The lesions resolved completely after 1 month without treatment. Although relatively rare and benign, this infection is probably under-reported and over-treated in this country. This case highlights the fact that urban physicians can expect to encounter once rare or solely rural-based infections with increasing frequency.
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BMC emergency medicine · Oct 2005
A meta-analysis of controlled trials of recombinant human activated protein C therapy in patients with sepsis.
Meta-analysis of two randomised controlled trials in severe sepsis performed with recombinant human activated protein C may provide further insight as to the therapeutic utility of targeting the clotting cascade in this syndrome. ⋯ This meta-analysis, therefore, raises doubts about the clinical usefulness of recombinant activated protein C in patients with severe sepsis and an APACHE II score > or = 25 which can only be resolved by another properly designed clinical trial.
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Previous studies have shown that spatio-tactile acuity is influenced by the clarity of the cortical response in primary somatosensory cortex (SI). Stimulus characteristics such as frequency, amplitude, and location of tactile stimuli presented to the skin have been shown to have a significant effect on the response in SI. The present study observes the effect of changing stimulus parameters of 25 Hz sinusoidal vertical skin displacement stimulation ("flutter") on a human subject's ability to discriminate between two adjacent or near-adjacent skin sites. Based on results obtained from recent neurophysiological studies of the SI response to different conditions of vibrotactile stimulation, we predicted that the addition of 200 Hz vibration to the same site that a two-point flutter stimulus was delivered on the skin would improve a subject's spatio-tactile acuity over that measured with flutter alone. Additionally, similar neurophysiological studies predict that the presence of either a 25 Hz flutter or 200 Hz vibration stimulus on the unattended hand (on the opposite side of the body from the site of two-point limen testing - the condition of bilateral stimulation - which has been shown to evoke less SI cortical activity than the contralateral-only stimulus condition) would decrease a subject's ability to discriminate between two points on the skin. ⋯ It was found that the addition of 200 Hz vibration to a two-point 25 Hz flutter stimulus significantly improved a subject's ability to discriminate between two points on the skin. Since previous studies showed that 200 Hz vibration preferentially evokes activity in cortical area SII and reduces or inhibits the spatial extent of activity in SI in the same hemisphere, the findings in this paper raise the possibility that although SI activity plays a major role in two-point discrimination on the skin, influences relayed to SI from SII in the same hemisphere may contribute importantly to SI's ability to differentially respond to stimuli applied to closely spaced skin points on the same side of the body midline.