974 resultados para organ


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Allegations of body parts trafficking implicating the West have been surfacing persistently in the media of many non Western countries for almost 20 years. Western media has responded to the allegations with denials and denunciations. This thesis considers the competing accounts and places them in a framework for analysis.

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This theory-building research suggests that the key to unlocking Australia's potential organ donor pool is to reduce the ethical ambiguity and legal uncertainty plaguing physicians' interepretation of the patients's best interests standard. This may generate a greater acceptance of organ donation as part of end-of-life patient care amongst our physicians.

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Next of kin who are aware of the deceased's organ donation wishes usually will honor those wishes, while next of kin who are unaware of these wishes typically withhold consent for posthumous donation. Encouraging individuals to communicate or register their organ donation wishes is therefore important. Using a sample of 409 participants, the current study sought to develop a profile of Australian adults who had communicated their organ donation wishes to family members. Christian participants and those who had a higher income were more likely to have communicated their donation wishes. Conversely, participants were less likely to have communicated their donation wishes if they were unregistered and undecided/opposed to organ donation, unregistered but willing to donate, or fearful of death. Finally, whether participants had communicated, registered, or communicated and registered their donation wishes was associated with their age, religion, attitude toward organ donation, and recall of media content about organ donation. Messages encouraging the communication of organ donation wishes to family members should therefore be targeted toward those individuals who are most likely to be receptive toward enacting this behavior.

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This paper considers the practice of learning-by-heart and argues for its relevance to learning, to thought (as defined by Gilles Deleuze) and as a way of turning towards the ‘new’ or ‘the future’, via the operation of repetition. It considers two modes in which rote learning can be productive and provocative—firstly, when the content itself is something worth retaining, and secondly, when the actual process of the learning itself and then the repeating align themselves with the criteria of ‘practice’, as framed by the author here. In the face of rote learning’s reputation as an out-moded pedagogical tool, the paper argues that it inhabits a paradoxical and productive site, whereby what begins as a repetition of the same, can open towards pure repetition (as Deleuze frames this notion), and facilitate inventiveness and a courting of the new. In this way, poetry, and the learning of it by rote, constitute a unique constellation, disputing the platitude that learning is ‘only discovering what one already knew’ and instead proposing that learning is closer to an awesome ordeal, one that leads to concepts and collisions that did not exist before and cannot be predicted in advance.

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BACKGROUND: Despite the success of the Breakthrough Collaborative Methodology (BCM) in increasing organ donation rates there has been little published evidence on the effect of the BCM on the wider attitudes and experiences of those involved in organ donation. This study sought to identify whether the National Organ Donation Collaborative in Australia had any additional influence on improving the experiences of staff and family members in the organ donation process. METHODS: IN-depth qualitative interviews with 17 family members from 13 families who had agreed to the organ donation of a deceased relative and 25 nurses and intensive care specialists at the Alfred Hospital, Melbourne, Victoria were carried out. RESULTS: The key factor in family members' decision to donate was prior knowledge of the deceased's donation wish. Although most family members did not regret their decision to donate, many were deeply dissatistified and, at times, confused by the technical and administrative nature of the donation process. Most staff members commented that the key community message about donation should be to encourage people to discuss donation rather than urging people to sign donor registers. CONCLUSION: This study identified valuable insights into the processes by which family members and intensive care unit staff deal with the actual processes of donation. Findings suggest that the process for families is far more complex than a simple agreement or refusal to donate. This study suggests that we should not assume that 'rates' of donation in Australia would increase merely through administrative programmes or marketing campaigns.

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PURPOSE: To evaluate if the ileum resection changes the functioning liver cell mass, the hepatic metabolism and the biodistribution of radiopharmaceutical in rats. METHODS: Twelve Wistar rats weighing 285g±34g were randomly divided into the ileum resection group (n = 6) and sham group rats (n = 6). After 30 days, they were anesthetized and 0.1mL of 99m-Tc-phytate(0.66MBq) was injected via femoral vein. After 30 minutes, blood samples were collected for red blood cells radioactive labeling and serum ALT, AST and gammaGT. Liver samples were used for 99m-Tc-phytatepercentage of radioactivity/gram of tissue and histopathology. Student’s t test was used with significance 0.05. RESULTS: There was a higher uptake of 99m-Tc-phytate in the liver of sham rats, compared to the ileum resection group (p<0.05). GammaGT, ALT and AST were increased in ileum resection rats compared to sham (p<0.05). The he patocytes count was significantly lower in ileum resection group than in sham (p<0.05). Liver: body mass ratio was lower in experimental animals than in sham group (p<0.05). CONCLUSION: These data support that the ileum has important role in liver function and liver mass regulation, and they have potential clinical implications regarding the pathogenesis of liver injury following lower bowel resection.

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This study was carried out with the objective of evaluating the effect of heat (38.8 degreesC) or cold (35.8 degreesC) stress on chicken embryo development and tissues Hsp70 levels, after the 13th day of incubation. Embryo weight (percent egg weight), organ weight (percent embryo weight) and Hsp70 levels (ng Hsp70 mug(-1) total protein) in different tissues (liver, breast muscle, heart, lungs, brain and kidney) were studied at the end of incubation. Cold stress induced a lower embryo weight and lower kidney and lungs weights, whereas heart and liver were lighter in heat-stressed embryos. An interaction between temperature and age was obtained only for Hsp70 levels in kidney and heart. Cold-stressed embryos showed higher Hsp70 levels in the brain, lungs and liver; a decrease in brain and breast muscle Hsp70 levels was seen from the 19th to 20th days in control embryos. Hsp70 levels increased with age in kidneys of control embryos and in heart of heat- and cold-stressed embryos. In conclusion, this study showed that chicken embryo organ weights are affected by incubation temperature, and that Hsp70 expression is tissue dependent (higher levels being seen in the brain) being cold-stress more effective in increasing Hsp70 levels in most studied tissues.

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The aim of the present study was to investigate the presence of Trypanosoma cruzi in the heart, liver, lung, and kidneys, using hemoculture and PCR analysis, of mice infected with different parasite strains during the acute and chronic phases of infection. Parasitemia curves revealed strain-specific biological behaviors. For the Y and JLP strains, the acute phase of infection started at days six and ten post-infection, parasitemia peaked at days seven and 15 post-infection, the chronic phase started at days nine and 28 post-infection, and animals started dying at days 19 and 120 post-infection, respectively. When the two strains were compared, the JLP strain exhibited reduced and slower replication rates associated with a delayed peak of parasitism and reduced parasite burdens. However, parasites were detected in all studied organs using PCR analysis. The capacity of both strains to infect different organs likely influences disease pathogenesis.

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This study examined the meanings that the intensive care unit (ICU) physicians attribute to their practice when caring for brain-dead organ donors. It is a phenomenological study, a qualitative method that searches for describing and understanding the experiences lived. Data were collected through recorded individual interviews made with 10 ICU physicians who work in a university hospital in the interior of São Paulo, Brazil. Three categories emerged from data: (1) providing care for brain-dead organ donors; (2) relating to donors and their families; and (3) the ethical concerns and self-awareness of the physicians. There is consensus as to-many aspects: demand of technical qualification and excellence in practice; need of investing in technology of organ transplant; and donors seen as human beings and holders of human rights. Participants understand that family participation is decisive in the donation process, although interactions between the family members and the physicians are difficult because of the sensitive nature of the situation. The physicians often felt ill-prepared to openly discuss the topic of brain death and organ donation. Educational programs for physicians and family members may assist with this difficult process.

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Natural killer (NK) cell activity was evaluated after the initiation and promotion steps in a medium-term multi-organ bioassay for carcinogenesis. NK cell activity was assessed in vitro by Cr-51 release assay at the 4th and 30th weeks of the experiment. Male Wistar rats were sequentially initiated with N-diethylnitrosamine (DEN i.p.), N-butyl-N-(4-hydroxybutyl)nitrosamine (BBN drinking water), N-methyl-N-nitrosourea (MNU i.p.), dihydroxy-di-N-propylnitrosamine (DHPN drinking water) and N,N'-dimethylhydrazine (DMH s.c.) at subcarcinogenic doses for 4 weeks (DMBDD initiation). One group was evaluated at the 4th week and the other was maintained without any further treatment until the 30th week. Two initiated groups were exposed through the diet to 2-acetylaminofluorene (2-AAF) or phenobarbital (PB), from the 6th until the 30th week, Five additional groups were studied to evaluate the effects of each initiator on NK activity. All groups submitted to initiation only, initiation plus promotion, or promotion only, developed significantly more preneoplastic lesions than the untreated control group. The main target organs for tumor development in the initiated animals n ere the liver and the colon, irrespective of treatment with 2-AAF or PB. NK cell activity was not affected bal exposure to genotoxic carcinogens after initiation, at the 4th week. Treatments only with PB or 2-AAF did not change NK cell activity, However, decreased NK cell activity was registered in the group only initiated with DMBDD and in the group given DMBDD+2-AAF. This late depression of NK cell activity at the 30th week could be related to the production of suppressing molecules by the tumor cells.