Transplacental IgG Subclass Concentrations in Pregnancies at Risk of Haemolytic Disease of the Newborn

The relationship of haemolytic disease of the newborn (HDN) to the transplacental passage of the four IgG subclasses was assessed at varous gestational ages by comparing the maternal and fetal IgG subclass concentrations in 34 pregnancies at risk of HDN with those in 30 pregnancies not at risk. Higher maternal and fetal IgG1 levels were attained in pregnancies at risk of HDN than in pregnancies not at risk. In contrast, a slight decrease in maternal IgG2 and IgG4 levels occurred in pregnancies at risk of HDN, as compared with a slight rise in maternal IgG2 and IgG4 levels in pregnancies not at risk of HDN. Changes in fetal IgG2 and 4 concentrations in either type of pregnancy were very similar, showing only slight increases between the 19th and 34th week of gestation. A slight decrease in maternal IgG3 occurred in both types of pregnancy. In contrast, higher and fairly steady levels of fetal IgG3 were observed in fetuses not at risk of HDN throughout gestation, when compared with those in 'at risk' pregnancies. However, the statistical reliability of these results is not clear since only small numbers of samples were tested and because wide variations in IgG concentrations were observed. The IgG subclass concentrations in 50 paired maternal and cord blood samples were also measured and revealed that IgG1 levels were substantially higher in cord rather than maternal blood; cord and maternal IgG2, 3 and 4 levels, on the other hand, were fairly similar.     

Omeprazole: A Comprehensive Review

Omeprazole is a member of a new class of substituted benzimidazoles. These agents inhibit the proton pump in the gastric parietal cell, blocking the final step in the gastric acid secretory pathway. Omeprazole has been investigated for the treatment of gastric ulcer, duodenal ulcer, gastroesophageal reflux, and various hypersecretory states. The prolonged inhibition of gastric acid secretion allows for once-daily dosing in patients with peptic ulcer disease and gastroesophageal reflux, and once- or twice-daily dosing in patients with Zollinger-Ellison syndrome. Compared with currently available therapies, omeprazole is well tolerated and demonstrates a more rapid ulcer healing rate. It is superior to conventional therapies in the treatment of Zollinger-Ellison syndrome. Side effects are infrequent when the drug is used for the short-term management of ulcers.     

SURGERY OF PERIURETERIC OBSTRUCTION IN 101 CHILDREN OVER ONE YEAR OF AGE

One hundred and one children over 1 year of age have had surgery for pelviureteric obstruction over an 11 year period. The common clinical features were abdominal pain, urinary infection or haematuria, but number presented as an incidental finding. Less commonly, the patients presented with an abdominal mass or with hypertension. The diagnosis was usually made on intravenous pyelography (IVP) but in the latter part of the series, renal nuclide scan (RNS) and ultrasonography (US) were preferred. Ninety–three patients had unilateral pyeloplasty, three had bilateral pyeloplasty and five had nephrectomy or heminephrectomy. Whereas initially nephrostomy drainage was used in the majority of patients after pyeloplasty, trend away from nephrostomy evolved in the latter part of the series. With experience, the incidence of postoperative complications was also reduced and there was reduction in the period of hospitalization. Clinical results were consistently satisfactory. Postoperative assessment after pyeloplasty was made by IVP and/or RNS and also US. A review of these investigations showed that RNS provided more factual information of the result when compared with the IVP.     

缺氧诱导因子-lα与脑缺氧缺血性损伤

缺氧诱导因子-lα（hypoxia-inducible factor-1alpha，HIF-lα）是近来发现的广泛存在于哺乳动物和人体内的一种缺氧应答调控因子，在调节缺氧诱导的基因表达中起关键性作用。它可调节表达多种靶基因如血管内皮生长因子、促红细胞生成素等，对改善脑缺氧缺血后能量代谢障碍、促进脑血流动力学恢复、抑制兴奋性氨基酸毒性、减少细胞凋亡等起重要作用。通过进一步对HIF-lα及其靶基因的研究，可能为临床治疗脑缺氧缺血性损伤提供了一种新的治疗策略。     

重症急性胰腺炎预防性抗生素治疗的荟萃分析

目的通过对有关文献的荟萃分析,探讨预防性抗生素治疗在重症急性胰腺炎(SAP)中的作用.方法检索1966年到2004年8月期间发表的有关预防性抗生素治疗SAP的作用方面的随机对照临床试验(RCT).按照入选标准,有6项临床试验纳入本研究,由2名作者各自独立地对入选研究中有关试验设计、研究对象的特征、研究结果等内容进行摘录,并用RevMan4.2软件进行分析.结果在SAP患者中,使用能在胰腺组织中达到有效浓度的广谱抗生素并不能减少胰腺感染(RR ＝ 0.77,95%可信区间为0.48 ～ 1.24,P ＝ 0.28),也不能减少手术干预(RR ＝ 0.84,95%可信区间为0.40～1.74,P ＝ 0.64),更不能降低死亡率(RR ＝ 0.54,95%可信区间为0.28 ～ 1.04,P ＝ 0.07),只有胰外感染的发生率有一定的减少(RR ＝ 0.52,95%可信区间为0.31 ～ 0.88,P ＝ 0.01).结论不建议在SAP患者中不加选择地预防性使用抗生素,但对于CT证实的坏死性胰腺炎,可以考虑抗生素预防性治疗.     

强脉冲光治疗浅表(皮肤)血管瘤临床观察

目的：观察强脉冲光（IPL）治疗浅表（皮肤）血管瘤的疗效。方法：选择60例浅表（皮肤）血管瘤患者,随机分为治疗组和对照组,治疗组用535nm、580nm强脉冲光治疗皮损,每三周治疗一次,三次为一个疗程;对照组采用波长为532nm的Q开关Nd：YAG激光治疗,每两周治疗一次,三次为一个疗程。观察两组皮损的治愈率、并发症等情况,并行统计学处理。结果：治疗组皮损三次治愈率明显高于对照组（P〈0.01）,患处瘢痕形成及炎症性色素沉着发生率均低于对照组。结论：强脉冲光（IPLTM）治疗浅表（皮肤）血管瘤效果满意。     

Do Children Need Concurrent Prompts in Order to Use Lexical Analogies in Reading?

In two experiments, children were taught a word and then given reminders of that word while reading unfamiliar analogous words. Reminders of the pronunciation of taught words facilitated reading of rime analogous words (e.g. b eak -p eak ) over head analogous words (e.g. bea k- bea n) in Experiment 1, and onset analogous words (e.g. st ilt- st em), over medial analogous words (e.g. e.g. st ilt-mi lk ) in Experiment 2. Importantly, however, privileged improvement for rime and onset analogous words was not evident in the absence of these concurrent prompts. The findings suggest that the analogy model developed by Goswami (1993) may have limited applicability in naturalistic settings.