Enzymatic methylation of arsenic compounds. IX. Liver arsenite methyltransferase and arsenate reductase activities in primates.

Inorganic arsenic is an important environmental toxicant of both natural and anthropogenic sources. It is a human carcinogen for which appropriate animal models of most arsenic-induced cancers are missing. Although methylation of inorganic arsenic has been considered its primary mechanism for detoxification, the results of recent investigations disagree. We have investigated 17 species of non-human primates, including great apes, New and Old World monkeys and prosimians, and have found that thirteen of them lacked hepatic arsenite methyltransferase activity in vitro. Four primate species, three from the Old World genus Macaca, and one of three animals from the New World genus Saimiri, had arsenite methyltransferase activity. That all the tissues examined were viable was demonstrated by their all having arsenate reductase activity. These data suggest that methylation of inorganic arsenic is not a detoxification mechanism for many non-human primates. Thus, alternative methods of detoxifying inorganic arsenic in mammals need to be considered and investigated. In addition, there appears to be a phylogenetic component to having arsenite methyltransferase activity, as evidenced by the result of our study of the Macaca species.     

Liver transplant for giant cell hepatitis with autoimmune haemolytic anaemia

Giant cell hepatitis (CGH) with autoimmune haemolytic anaemia (AHA) is a distinct entity with an aggressive course. Immunosuppression may help early disease. A case is reported of a child with GCH and AHA with early disease recurrence after liver transplantation for end stage liver disease.     

The student experience of undergraduate education: the relationship between academic and clinical learning environments

This paper examines the experiences of the authors as undergraduate nursing students (one from a university background, the other from a polytechnic).The paper particularly focuses upon an examination of the relationship between the academic and clinical learning environments. The authors attempt to explain aspects of this relationship from their own personal interpretations. They consider the discrepancies they have experienced between the two settings, in relation to both general philosophies of nursing and issues relating to actual nursing intervention. Reasons why the discrepancies exist are considered along with the ways students cope with the situation.Finally the paper considers the implications of student experience in relation to the proposed changes in nurse education, and recognises the need to consider the situation of those who have graduated from nursing degree programmes.     

5例肺动脉血栓内膜剥脱术后神经系统障碍的临床特点及原因

目的 总结5例肺动脉血栓内膜剥脱术治疗慢性肺动脉血栓栓寨症术后神经系统障碍的患者的临床表现特点,并尝试分析其原因.方法 回顾2002年至2010年,26例因慢性血栓栓塞性肺动脉高压症行肺动脉血栓内膜剥脱术的患者围手术期资料.总结术后生存患者中5例出现神经功能障碍并发症者的临床与影像学特点,分析其与无并发症患者的手术前、手术中的资料,寻找可能的影响因素.结果 26例中围手术期死亡4例,22例生存者心功能改善,生活质量明显提高.5例围手术期出现神经系统障碍表现者中,3例表现为嗜睡、谵妄、记忆力障碍,颅脑CT未见异常发现,治疗后症状1周内消失,2周内完全恢复;另2例患者除上述症状外,还表现为共济失调、步态不稳、舞蹈样动作,症状持续时间长,其中1例经高压氧治疗后1个月症状好转,颅脑CT未见异常发现,颅脑MRI显示双侧中脑,基底节区异常信号,治疗8周症状基本好转出院,6个月症状完全消失,复查颅脑MRI异常信号消失;1例颅脑CT未见异常发现,12周出院,恢复较差,生活部分自理.术后出现神经系统障碍患者Jamieson手术分型Ⅲ型、Ⅳ型比例较多(P=0.024),手术中停循环时间较长(P=0.034).结论 肺动脉血栓内膜剥脱术后早期神经系统障碍多表现为弥漫性脑皮层与对称性基底节区神经功能障碍,颅脑MRI相应区域异常信号,多数患者症状在2-8周内消失,6个月内颅腩MRI异常信号可以消失.出现神经系统功能障碍的患者多手术操作难度大,停循环时间较长,推测考虑与术中脑缺血缺氧有关.

Abstract：

Objective Investigate the clinical features of the neurological disorders in patients after pulmonary thromboendarterectomy (PTE) for chronic pulmonary thromboembolism , analyze the factorial. Methods A retrospective study was made of 26 patients who underwent PTE between 2002 and 2010 in Beijing Chao-Yang hospital. The symptom of neurological system disorders occurred in the survivors were been investigate. The preoperative conditions and the perioperative conditions of all survivors were investigated. Compared the differences between the groups with neurological system disorders and the groups without. Results There were 22 patients of 26 survived after the surgery. Cardiac function of the survivors improved, and the quality of life improved significantly. 5 cases of the 22 survivors had symptoms of neurological system disorders. 3 patients showed lethargy, delirium, memory disorders, brain CT found no abnormal, symptoms recovered within 2 weeks. The fourth patient showed ataxia, unsteady gait, dance-like movements symmetry, in addition to the above symptoms, brain CT no abnormal showed,brain MRI showed bilateral abnormal signal in the midbrain, basal ganglia, symptoms improved and discharged after 8 weeks, the symptoms completely disappeared 6 months, and the abnormal signals in brain in MRI disappeared. The fifth patient with similar symptoms to the fourth, brain CT no abnormal found, be discharged 10 weeks after the operation, recovery is poor, living part of themselves. The postoperative neurological disorders occurred in the patients of Jamieson surgery type Ⅲ type, Ⅳ type of larger proportion, (P = 0.024), longer circulatory arrest surgery (P = 0.034). Conclusion The neurological disorders postoperative PTE often showed diffuse symmetric cerebral cortex and basal ganglia nerve dysfunction, brain MRI showed abnormal signal corresponding region, the majority of symptoms disappeared in 2 - 8 weeks, abnormal signal in brain MRI could disappeared after 6 months. Neurological dysfunction occurs in patients with more difficult surgical procedure, longer circulatory arrest, suggesting that with the surgery cerebral ischemia and hypoxia related.     

髂骨皮瓣移植加外固定器固定修复胫骨缺损伴小腿软组织缺损

目的 探讨髂骨皮瓣移植加外固定器固定修复胫骨缺损伴小腿软组织缺损的方法和临床效果。方法1998年5月～2001年5月,应用Bastiani外固定器固定腔骨骨折及缺损端,同时行旋骼深血管为蒂的骼骨皮瓣移植,治疗腔骨缺损伴小腿软组织缺损共22例。男15例,女7例;年龄16～58岁,平均37岁。随访5～36个月,平均25.5个月。结果22例髂骨皮瓣均完全成活,胚骨及软组织缺损Ⅰ期修复,骨外固定器固定牢固,骨折愈合快,植骨与骨折端于术后2～4个月达临床愈合,术后3～6个月达骨性愈合。患肢功能恢复良好,无一例发生骨不连、骨坏死、关节僵直等并发症。结论 吻合旋骼深血管的髂骨皮瓣移植,可Ⅰ期修复胫骨缺损伴小腿软组织缺损。结合骨外固定器固定,可为植骨愈合创造便利条件,且固定牢靠,受区创伤小,可早期进行功能锻炼,避免应力遮挡,促进骨折愈合,是目前治疗胚骨缺损伴小腿软组织缺损的有效方法。     

Low back pain and widespread pain predict sickness absence among industrial workers

Background  

The prevalence of musculoskeletal disorders (MSD) in the aluminium industry is high, and there is a considerable work-related fraction. More knowledge about the predictors of sickness absence from MSD in this industry will be valuable in determining strategies for prevention. The aim of this study was to analyse the relative impact of body parts, psychosocial and individual factors as predictors for short- and long-term sickness absence from MSD among industrial workers.     

Records as a data source: the case for health visitor records

Health records as a source of research data are examined. A case study approach is adopted to evaluate the reliability of health visitor records as a data source. It is argued that such records may be a rich source of epidemiological data although their deficiencies should be acknowledged.