Using gas chromatography and mass spectrometry to determine 25-hydroxyvitamin D levels for clinical assessment of vitamin D deficiency

Vitamin D is responsible for multiple metabolic functions in humans. Rickets are the most common disease caused by vitamin D deficiency. It is caused by poor calcium intake resulting in poor serum-ionized calcium. The purpose of this study is to develop a rapid, sensitive, and feasible method to determine the 25-hydroxy-vitamin D3 (25(OH)D3) levels in blood samples for clinical assessment. In this study, gas chromatography coupled mass spectrometry with trimethylsilyl derivatization (TMS-GC-MS) is the most suitable protocol for quantitative analyses of 25(OH)D3. Performance of method was evaluated and compared with liquid chromatography and immunoassay. Method validation has been carried out with plasma specimens. The limit of quantitation of TMS-GC-MS method is 1.5 ppb with good linear correlation. Furthermore, the dietary intake and nutritional status of vegetarian and non-vegetarians in Taiwan were assessed by our validated method. As a result, this vitamin D nutrition survey demonstrates that most Taiwanese people have insufficient vitamin D. Due to dietary habits; the male vegans may have the highest risk of vitamin D deficiency.     

立家之本:血管外科开放手术

近年来,血管外科腔内治疗手段飞速发展和进步,因其创伤小、并发症少、术后恢复快及对患者一般情况要求较宽松等优势,使得很多临床医生和患者更倾向于通过腔内手段治疗血管疾病,逐渐忽视了外科手术治疗的重要性,甚至出现忽视患者病情的个体情况而盲目选择腔内治疗的趋势。作为血管疾病治疗的重要方式,开放手术乃是血管外科的立家之本,是血管外科临床医生的基本技能,在很多情况下有着不可替代的作用,应当再次被强调、被重视。     

后Pilon骨折的诊治现状与进展

后Pilon骨折是一种新近报道的Pilon骨折的特殊模式,其特征是累及后外踝和后内踝.在过去由于后Pilon骨折没有得到充分的认识,常被误诊为后踝骨折,也导致这类患者功能恢复不良.因此是否能作出正确诊断至关重要,只有熟悉后Pilon骨折的各种影像学特征并了解合并损伤的机制,才能及时、准确地诊断后Pilon骨折,并改进这种具有挑战性骨折的术前计划和临床结果.本文着重介绍了后Pilon骨折的损伤机制,现有的分类方案,并讨论了目前使用的各种手术方法.     

自控技术在老港建筑垃圾资源再利用中的应用

自控技术在建筑垃圾处理生产线中的应用和发展对于减少人员伤害、降低劳动强度、提高生产和维保效率、提高行业自动化水平和实施精细化管理等方面都具有重要作用。通过自控技术在上海老港再生建材利用中心(一期)中运用的介绍,为建筑垃圾处理技术提供新思路,对后续类似项目具有借鉴作用。     

静脉输注中排气法的改进

[目的]对静脉输注操作中的排气法进行改进,使其更适合护理工作.[方法]同1名护理人员对相同病人分别用两种排气法进行静脉输注.[结果]改进的静脉输注排气法最大限度地缩短了操作时间,提高了排气一次成功率,同时减少了药物的丢失量.[结论]改进后的静脉输注排气法有很大的实用性和可行性,提高了一次性排气成功率,缩短了操作时间,使整个操作更连贯,方便.     

AN UNUSUAL BILATERAL VAGAL PARAGANGLIOMAS： ONE CASE STUDY

VAGAL paraganglioma VP)is an uncommonneoplasm originating from neural crest paragan-glion cells located along the vagus nerve,repre-senting less than5%of all paragangliomas of the head andneck.1Despite improvement in microsurgical techniques,management of…