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1.
AIM: Establish a list of first year medical students' attitudes, doubts, and knowledge in the fields of organ transplantation and donation. METHOD: Anonymized questionnaire handed out to students during class lectures. RESULTS: 183 questionnaires were distributed and 117 returned (participation: 64%). The average age of the students was 21.6 +/- 2.7 years (range 18 to 38 years); the sample included 71 women (60.7%) and 48 men (39.3%). Only 2 students (2%) were not interested in the subject of organ donation. The students knew very little of the legal aspects of organ donation and 1/4 of them thought there was even a Federal law regarding organ transplantation. When asked if they knew whether a law existed in the Canton of Berne, 44% replied yes, but only 24 (20%) knew that this is contradictory. There was no gender difference in the answers to these question. From 57 students (48%) 246 individual comments on doubts and concerns were analyzed. In this respect, the students mainly questioned whether the donor was truly dead when donation took place (n = 48), if illegal transplantation could be eliminated (n = 44) and if transplantation was truly necessary (n = 43). Some also mentioned religious/ethical doubts (n = 42). In regard to organ donation by a living individual, 27 students were concerned about the health of this donor. 20 students had doubts regarding the pressure possibly applied by family members and friends and as many voiced doubts in regard to premature diagnosis of brain death of potential donors. Only 2 students were concerned about the post-mortem presentation. 45 students (48%) indicated discomfort with the donation of certain organs. They ranked the kidney as the first organ to donate, followed by the pancreas, heart, cornea, intestine, lung and liver. CONCLUSION: The interest in organ donation and transplantation is already strong in fist year medical students in the pre-clinical stage. However, differences from lay public are not readably detectable at this stage of medical training. Adequate information could influence future physicians in their mediatory role.  相似文献   

2.
This article provides an overview of lung transplantation, including a brief history of this relatively new procedure. The importance of patient selection and evaluation to the eventual outcome is presented, as well as donor and recipient criteria. A review of operative technique is followed by a discussion of a new approach to meeting the critical organ shortage, living related lobe donation. Lung transplantation continues to prove itself as a viable treatment option for patients with end-stage pulmonary disease.  相似文献   

3.
A retrospective analysis of the demographic features of all potential organ donors over a 3-year period (1994-1996) at one organ procurement organization was conducted. The potential donor pool of 495 people was 42% female and 58% male, with a slight difference in consent by gender. The mean income difference between donors and nondonors was less than $3000 per year (obtained from zip code census data). Educational achievement affected donation at the lowest educational levels. Cause of death influenced donation, with motor vehicle crash victims donating more often. The strongest factor in consent for donation was ethnicity; whites were more likely to donate than were other ethnic groups. The combination of gender, ethnicity, and cause of death improved the probability of determining a positive outcome to 63%. Demographic information on donors and nondonors can increase public and professional understanding as well as influence decision making to improve donation.  相似文献   

4.
BACKGROUND: Failure of the donor (graft) heart is the main cause of mortality in the first month after orthotopic cardiac transplantation. In a preliminary study marked downregulation of cardiac beta adrenoceptor density was found in apparently normal donor hearts of recipients who developed severe cardiac failure soon after implantation. Cardiac beta adrenoceptors are an important factor in the development of cardiac failure in the human heart. The aim of this study therefore was to determine whether fatal graft failure in the first month after transplantation is associated with downregulation of beta adrenoceptor density in the donor heart. PATIENTS AND METHODS: Right ventricular endomyocardial biopsy specimens were taken from consecutive adult donor patients immediately before implantation. A previously described radioligand binding method was used to determine beta adrenoceptor density in consecutive patients who developed fatal graft failure and died within 1 month of transplantation and in a group of control donors transplanted during the same period. RESULTS: Perioperative fatal graft failure developed in 13 patients. Forty one specimens from donor hearts that were transplanted into recipients who did not develop fatal graft heart failure formed the control group. There were no systematic differences in donor or recipient characteristics between the graft heart failure and control groups. In particular donor catecholamine requirement and recipient pulmonary vascular resistance did not differ between groups. Total beta adrenoceptor density was reduced in the fatal graft heart failure group compared with that in the controls (13.4 (7) fmol/mg v 21 (7) fmol/mg; P < 0.01). There was a positive correlation between beta adrenoceptor density in the donor heart and time to death in the graft heart failure group (r2 = 0.3, P < 0.05). The beta adrenoceptor binding affinity (Kd) did not differ between the graft failure group and the controls (47 (6) pM v 44 (7) pM). CONCLUSION: The development of perioperative fatal cardiac failure after orthotopic cardiac transplantation is associated with downregulation of beta adrenoceptors in the donor heart before implantation.  相似文献   

5.
Liver allografts in some rat strains are often spontaneously accepted across a complete major histocompatibility barrier without the requirement for immunosuppression while other nonliver allografts are rejected. In previous studies, we have shown that spontaneous acceptance is dependent on liver passenger leukocytes. Depletion of passenger leukocytes by donor irradiation allows rejection, with DA recipients of irradiated PVG livers having a median survival time (MST) of 16 days. Here we show that, in this model, spontaneous acceptance is reconstituted by intravenous injection of donor leukocytes. Intravenous injection of 3-5x10(7) PVG liver leukocytes significantly prolonged DA survival time (MST=96 days, P=0.026), as did 5x10(7) spleen leukocytes (MST>100 days, P=0.002). Deletion of T cells from the reconstituting inoculum reduced survival time (MST=78 days, P=0.039), whereas deletion of B cells or monocytes/macrophages had no effect on survival time. In contrast, PVG hearts are regularly rejected by DA recipients, and PVG liver or spleen leukocytes, even at doses of greater than 3x10(8) cells/recipient, were unable to induce heart acceptance. To investigate the possibility that acceptance of the irradiated liver but not the heart might be due to the large mass of the liver, two kidneys and two hearts of PVG origin were transplanted to each DA recipient together with 1.5x10(8) PVG leukocytes. These organs survived for greater than 200 days, thereby showing that a large mass of donor tissue, in association with donor leukocytes, leads to acceptance of organs that are rejected if transplanted singly. It appears likely that spontaneous liver transplant tolerance is a high-dose or activation-associated immune phenomenon.  相似文献   

6.
It has been shown that following heterotopic heart transplantation the recipient left ventricle ejects more effectively when it contracts out of phase with the donor left ventricle. However, this is rarely the situation, as the two hearts beat independently of one another and the denervated donor heart tends to beat faster than the recipient. In this study the hemodynamic effects of connecting the two hearts by an external temporary dual-chamber pacemaker were evaluated. The donor right ventricle was sensed and the recipient right atrium paced after a timed delay. The delay was adjusted so that recipient systole coincided with donor diastole. Eleven patients were studied in the first postoperative day. Pacing resulted in an improvement in cardiac output from 5.0 to 5.6 l/min (p = 0.003) and a reduction in pulmonary capillary wedge pressure from 16 to 12 mmHg (p = 0.0035). This was associated with a 35% reduction in inotrope requirements. It is concluded that sequential pacing of the two hearts is a useful adjunct to inotropic support in the postoperative period.  相似文献   

7.
A questionnaire survey was carried out to examine the attitudes of 125 medical students, aged 19-37 years, toward organ donation. 73 of them were in their first semester and 52 senior students in their last year of the study. A return rate of 88% (senior students: 58%) was achieved. Although 59% (71%) expressed willingness to donate their organs, only 30% (50%) had signed an organ donor card. Concerns regarding definition and declaration of death, benefit of organ donation and feelings of the donor's family were identified in 51% (38%) of the students. 71% (79%) had already discussed this issue with their families. In summary, results of the study indicate that more intensified interdisciplinary discussion and information during the study of medicine could bring about an even more positive attitude toward organ donation.  相似文献   

8.
Patients with clinical brain death following head injury are important potential cadaveric organ donors. We analyzed our series of cranial gunshot wounds with particular attention to the frequency and patterns of organ donation after fatal injuries. Sixty-six patients with gunshot wounds to the head, including 59 with intracranial involvement (43 male, average age 26 years) were seen during a 4-year period. Injuries were limited to the head in 50 of 59 patients. Overall mortality was 66 per cent. Predictors of mortality included Glasgow Coma Scale (GCS) of six or less (93%), self-inflicted gunshot wounds (75%), and computed tomography (CT) findings of bihemispheric injury (87%) or ventricular injury (82%). Of the 39 patients who died, 28 met standard criteria for brain death, and nine of these went on to organ procurement. Thirteen families refused donation, and six patients were not harvested for reasons including old age, pregnancy, suspicion of AIDS, coroner refusal, and failure to pursue consent. Principles essential to maximal organ retrieval include: 1) Recognition that patients suffering cerebral gunshot wounds represent potential organ donors and that certain factors are predictive of mortality; 2) Critical care/trauma team approach with standardized management and timely declaration of brain death; 3) Early search for family members and prompt notification of organ procurement agencies; 4) Sensitivity to cultural issues influencing donation; and 5) Programs to increase public awareness of organ donation.  相似文献   

9.
BACKGROUND: Na+/H+ exchange plays an important role in the ionic changes observed during myocardial ischemia and reperfusion. We investigated the cardioprotective efficacy of a selective Na+/H+ exchange inhibitor, 4-isopropyl-3-methylsulfonyl-benzoylguanidin-methanesulfonate (HOE642), in a canine model of long-term heart preservation. METHODS: Canine donor hearts were stored for 24 hours in hyperkalemic crystalloid cardioplegic solution; in cardioplegic solution enriched with HOE642; in cardioplegic solution enriched with HOE642, with donor and recipient treated with HOE642; in standard cardioplegic solution, with donor and recipient treated with HOE642; or in standard cardioplegic solution, with only the recipient treated. After orthotopic transplantation, pressure-volume relationships were obtained and dogs were weaned from bypass. Morphology was studied. RESULTS: Myocardial compliance was well preserved when donor and recipient were treated. These groups had the lowest myocardial water content, and no morphologic signs of irreversible damage. In these groups, weaning from cardiopulmonary bypass was successful in 10 of 10 animals, with a cardiac index around 2 L x min(-1) x m(-2). Only 3 of 5 animals in each of the other three groups could be weaned, with significantly lower cardiac indices. CONCLUSIONS: Treatment with HOE642 in both donor and recipient improves myocardial compliance, postweaning cardiac index, and ultrastructure of donor hearts preserved for 24 hours and orthotopically transplanted.  相似文献   

10.
Objective: In this pilot study we tested the influence of manipulating anticipated regret on organ donor registration behavior. Method: A simple web-based experimental trial was conducted. Nonorgan donors were allocated to a simple anticipated regret manipulation versus a theory of planned behavior or a control condition. The main outcome measure was registration on the U.K. organ donor register at 1-month follow-up. Results: A simple anticipated regret manipulation led to a significant increase in organ donor registrations. Conclusion: Interventions utilizing anticipated regret may have the potential to significantly increase organ donation rates. (PsycINFO Database Record (c) 2011 APA, all rights reserved)  相似文献   

11.
BACKGROUND: Controversy exists regarding donor and recipient factors that promote the development and progression of coronary artery disease after heart transplantation and the likelihood of coronary artery disease causing death or retransplantation. METHODS: To investigate this issue in a large cohort of patients, we analyzed 5963 postoperative angiograms performed in 2609 of the 3837 patients undergoing heart transplantation at 39 institutions between January 1990 and December 1994. Coronary artery disease was classified as mild, moderate, or severe on the basis of left main involvement, primary vessel stenoses, and branch stenoses. Coronary artery disease was considered severe if left main stenosis was > 70% or 2 or more primary vessels stenoses were > 70% or branch stenoses were > 70% in all 3 systems. RESULTS: By the end of 5 years after heart transplantation, coronary artery disease was present in 42% of the patients, mild in 27%, moderate in 8%, and severe in 7%. Coronary artery disease-related events (death or retransplantation) had an actuarial incidence of 7% at 5 years and occurred in 2 of 3 of the patients with development of angiographically severe coronary artery disease. By multivariable logistic analysis, risk factors for donor coronary artery disease included older donor age (P < .0001) and donor hypertension (P=.0002). By multivariable analysis in the hazard function domain, risk factors identified for the earlier onset of allograft coronary artery disease included older donor age (P < .0001 ), donor male sex (P=.0006), donor hypertension (P=.07), recipient male sex (P=.02), and recipient black race (P=.01). The actuarial incidence of severe coronary artery disease was 9% at 5 years. CONCLUSIONS: Angiographic coronary artery disease is very common after heart transplantation, occurring in approximately 42% of the patients by 5 years. Older donor age, donor hypertension, and male donor or recipient predict earlier onset of angiographic allograft coronary artery disease. Although severe angiographic allograft coronary artery disease occurs in only 7% of the patients at 5 years, its presence is highly predictive of subsequent coronary artery disease-related events or retransplantation.  相似文献   

12.
BACKGROUND: We previously reported excellent outcome at 6 months after transplantation in recipients of expanded criteria donor kidneys that other local centers had declined, kidneys that nobody wanted (KNW), versus controls. We now report follow-up after 23 months. METHODS: We retrospectively reviewed 27 donor and 24 recipient characteristics in 126 adult recipients of transplants from January 1, 1995, to November 25, 1996. RESULTS: Donors of control kidneys versus KNW were younger and had significantly higher minimum 4-hr urine output. Recipients of control kidneys versus KNW had significantly more HLA matches and lower 3-month posttransplant serum creatinine levels. Patient and graft survival rates were similar between the control kidneys versus the KNW. We also compared the control kidneys and KNW with regard to prompt function or delayed graft function and satisfactory versus unsatisfactory function (unsatisfactory: serum creatinine > or =2.5 ml/dl or graft loss at 6 months) to identify donor and recipient characteristics associated with delayed graft function and unsatisfactory outcome. The incidence of rejection was significantly lower in control kidneys and KNW with satisfactory function versus control kidneys and KNW with unsatisfactory function. CONCLUSIONS: These data demonstrate: (1) similar graft survival at 12 months, (2) lower donor age, (3) higher minimum 4-hr urine output, and (4) more HLA matches in recipients of control kidneys versus KNW. Optimal outcome was achieved in recipients of control kidneys and KNW with prompt function and satisfactory function based upon serum creatinine in the first 6 months and in recipients with lower rates of rejection. Although outcome is dependent upon many donor and recipient variables, we believe that with careful donor and recipient selection, excellent outcome can be achieved using expanded criteria donor kidneys.  相似文献   

13.
BACKGROUND: Risk factors for death after heart transplantation (Tx) are frequently documented from multicenter registries. Although this information is helpful, it reflects a whole range of experiences and results, and may not translate to a particular center. This study was performed to (1) evaluate pre-Tx factors affecting mortality in a single-center experience, and (2) compare these factors with risk factors obtained from multicenter registry reports. METHODS: Review of our transplant database between January 1984 and December 1995 identified 405 adults who received a primary heart Tx. Multiple factors were analyzed, including demographics, Tx era, cytomegalovirus status, United Network for Organ Sharing status of recipient, presence of pulmonary hypertension, previous cardiac operations, mechanical ventilation or circulatory support, ischemia time, number of rejection episodes, and preoperative flow cytometry crossmatching. RESULTS: One- and 5-year survival rates were 87.8% and 73.4%, respectively (Kaplan-Meier). Contrary to multicenter registry reports, our data indicate that reoperative procedures, left ventricular assist device support, increasing donor and recipient age, and ischemia time up to 4.2 hours are not risk factors for death after Tx. Likewise, mode of donor death is not a risk factor affecting outcome. Significant risk factors for mortality identified by multivariate analysis included early transplant era (1984 to 1989; p = 0.002), female donor (p = 0.042), cytomegalovirus-seropositive donor (p = 0.048), high pulmonary vascular resistance (p = 0.018), and intraaortic balloon pump support (p = 0.03). It also identified a positive B-cell flow cytometry crossmatch (p = 0.015) to be a risk factor with univariate analysis. CONCLUSIONS: Our data identify a group of recipients, reportedly at high risk in multicenter registries, who are not at increased risk of death after Tx. This information supports the growing experience with older donors and recipients and with bridged transplants, and has allowed us to expand our donor pool. These prognostic factors at evaluation allow more liberal selection of patients and donors for transplantation.  相似文献   

14.
INTRODUCTION AND AIMS: Brain death causes myocardial impairment by some mechanisms not yet well understood. The aim of this work was to assess the echocardiographic features found in these patients and their implication in donor selection for heart transplantation. METHODS: With this aim, we have studied 38 consecutive patients with brain death assessed as possible donors for heart transplant in our hospital in the last 3 years. Age was 23 +/- 13 years; 77% were male. No history of cardiac disease was present in any patient. An adequate transthoracic echocardiogram was obtained in 74% of patients; transesophageal view was used in the remaining 26%. RESULTS: Echocardiogram was strictly normal in only 14 patients (37%). Mild valvular alterations were found in 5 patients (13%); a dilated aortic root in 1 (3%); moderate concentric left ventricular hypertrophy in 5 (14%); mild pericardial effusion in 1 (3%); mild septal hypokinesia with normal left ventricular ejection fraction in 4 (10%); abnormal left ventricular diastolic function in 7 (18%); and diffuse hypokinesia with ejection fraction less than 60% in 14 (37%). In 7 patients (18%) ejection fraction was lower than 40% (one of them was cocaine-addict). Mean ejection fraction was 59 +/- 15% (23 to 83%). Only 2 of the 19 (10%) donor hearts implanted in our hospital showed early dysfunction after transplant, but no relation to pretransplant ejection fraction was found. Ejection fraction increased from 62% pretransplant to 73% at one week after transplant in the other 17 cases. CONCLUSIONS: Brain death commonly causes alterations of left ventricular function, and this impairment is severe in almost 20% of cases. These echocardiographic features must be known when selection of donors for heart transplantation is concerned.  相似文献   

15.
DH Wisner  B Lo 《Canadian Metallurgical Quarterly》1996,131(9):929-32; discussion 932-4
BACKGROUND: Blunt trauma patients without vital signs on admission are potential non-heart-beating donors. OBJECTIVE: To review the feasibility of postmortem visceral perfusion and organ donation in blunt trauma patients without vital signs. DESIGN: A retrospective case series of blunt trauma victims who were declared dead in the emergency department. SETTING: A level I trauma center. MAIN OUTCOME MEASURES: Factors potentially precluding donation and potential donor yield. RESULTS: The mean trauma-to-death interval was 71 minutes (< 60 minutes in 57% of the cases). Injuries likely to interfere with in situ perfusion were present in 41% of the cases. The tissue donation consent rate was 45%. Assuming a similar organ donation consent rate, the potential donor yield was 9% after excluding victims who were younger than 60 years of age, warm ischemia times that were less than 60 minutes, and patients who had injuries precluding perfusion. CONCLUSIONS: The potential organ yield from non-heart-beating, blunt trauma victims is low, which highlights the ethical and legal problems of this approach.  相似文献   

16.
A country's organ donation rate and hence the availability of thoracic organs can be increased by organizational measures, by legislative incentives, and by increasing awareness among the public and healthcare professionals. We analyzed the relative impact of organ procurement legislation or policy on heart and lung donation rates per million population per year in the four countries participating in the Eurotransplant organization (population, 112.7 million) between January 1992 and December 1994. Within this organization, Austria and Belgium have presumed-consent legislation, whereas Germany and the Netherlands have an opting-in (explicit-consent) policy. Although practices vary even among countries with similar policies (eg. in Belgium, relatives of the donor retain the right to object to procurement of organs in the absence of an explicit consent from the deceased before death), rates of heart and lung donation were at least twice as high in the two countries with presumed-consent legislation as in the two countries that rely on a policy of explicit consent from the donor's next of kin.  相似文献   

17.
BACKGROUND: Although strict selection criteria are being used for the acceptance of human donor hearts for transplantation, problems with respect to functional recovery on reperfusion sometimes still occur. Therefore, evaluation of the viability of a human donor heart before implantation during heart transplantation may be of great value. METHODS AND RESULTS: In the present study, the energy metabolism of 25 excised human donor hearts arrested with St Thomas' Hospital No. 2 cardioplegic solution was evaluated noninvasively by use of 31P magnetic resonance spectroscopy (MRS) before implantation and was correlated with myocardial function measured with thermodilution in heart transplant patients. No significant correlation was observed between the cardiac index of heart transplant patients during the first hours after transplantation and the phosphocreatine/ATP (r = .13, P = .54), inorganic phosphate/ATP (r = .26, P = .21), phosphomonoesters/ATP (r = .02, P = .92), or phosphocreatine/inorganic phosphate (r = .16, P = .44) ratio or the intracellular pH (r = .06, P = .78) at the time of reperfusion. However, 1 week after transplantation, a significant correlation was observed between the cardiac index and the phosphocreatine/ATP (r = .49, P = .01), phosphomonoesters/ATP (r = .45, P = .02), and phosphocreatine/inorganic phosphate (r = .40, P = .05) ratios at the time of reperfusion. In contrast, the inorganic phosphate/ATP (r = .10, P = .63) ratio and pH (r = .31, P = .13) at the time of reperfusion showed a poor correlation with the cardiac index 1 week after transplantation. CONCLUSIONS: Functional recovery after human heart transplantation is related to the metabolic condition of the hypothermic donor heart.  相似文献   

18.
Implantable left-ventricular assist devices (LVAD) are successfully used as a bridge to transplant if the patient's condition is worsening and no donor organ is available. They allow recovery of compromised organ function. However, postoperative bleeding, thrombemboelism, and right-heart failure may jeopardize the important improvement of organ function and may even lead to death. We introduce our strategy for implantation of the Novacor LVAD system, which aims at minimal bleeding and maintained right-heart function. The Novacor LVAD was implanted with the heart beating during extracorporeal circulation in 8 patients, 3 of whom had previous cardiac surgery. Postoperatively, no patient developed right heart failure or had to undergo redo thoracotomy.  相似文献   

19.
BACKGROUND: The current shortage of donor organs, combined with an increasing demand for cardiac allografts, means that extended donor criteria are becoming more and more accepted. The use of cardiac allografts for transplantation from donors after acute poisoning is still under discussion; few data are currently available in the medical literature. We describe our experience with 19 orthotopic heart transplant recipients of organs from donors after acute intoxication with different agents. METHODS: Between March 1989 and December 1997, 883 orthotopic heart transplantations were performed at our transplant unit. Within this group, we accepted donor hearts after ethanol intoxication (n=1), benzodiazepine (n=1), alkylphosphate (E 605) in combination with beta-blocker intoxication (n=1), carbon monoxide poisoning (n=5), digitalis (n=1), digitalis/glibenclamide (n=1), chlormethiazole (n=1), propoxyphene (n=1), alkylphosphate (E 605) (n=1), insulin (n=2), neprobamate/ thiocyacide/flurazepam (n=1), paracetamol (n=1), carbamazepine (n=1), and cyanide (n=1) intoxication. At the time of organ explantation, hemodynamic data were available from all patients. RESULTS: Early mortality in this group was 11%; cumulative survival after 5 years was 74%. CONCLUSIONS: Based on our limited experience, cardiac allografts from donors exposed to different kinds of poisons can be transplanted in selected cases. If the donor organ is not hemodynamically compromised, showing regular filling pressures on low or mild inotropic support just before explantation, and if there are no electrocardiographic changes in combination with elevation of the transaminases, cardiac allograft transplantation seems to be a safe and life-saving procedure.  相似文献   

20.
OBJECTIVE: To investigate the attitudes toward organ transplantation, organ donation and recipients in young people in Beijing, Shanghai, and Wuhan. METHODS: A questionnaire was designed for 3012 young people aged 20-45 years (999 in Beijing, 990 in Shanghai, and 1023 in Wuhan). The data of questionnaire were processed with SPSS software. RESULTS: Over 90% of the respondents knew that human organs can be transplanted; over 85% considered that organ transplantation is a welfare undertaking; more than 85% thought that when someone's organ is in critical condition, it is necessary to perform organ transplantation; over 70% expressed willingness to receive organ transplantation if it is needed or possible. In the mode of organ donation, 70% emphasized that organ donation should be dependent on volunteers and the donor should be rewarded in a certain form. Organ recipients in sequence are relatives, specialized medical institutions, friends, members of volunteer organizations, and others. The factors affecting the attitudes towards organ transplantation are analyzed. CONCLUSION: There is a better attitude toward organ transplantation among young people in cities. The conventional attitudes and feudal habits are one of the major obstacles to the course of organ donation in China.  相似文献   

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