Efficacy of grass–maize pollen oral immunotherapy in patients with seasonal hay-fever: a double-blind study

Forty patients with a well-documented history of seasonal hay fever and a positive skin-prick test specific to grass pollen, including Bermuda grass and maize pollen ( Zea maize ), were allocated randomly on a double-blind basis to receive either an oral mixed grass–maize pollen extract or a matched placebo during the 1981/1982 grass pollen season. After 12 months the code was broken and patients on placebo were transferred to active therapy while patients on active therapy continued with maintenance therapy for another 12 months during the 1982/1983 grass pollen season. The assessment of the effect of the orally administered grass–maize pollen extract was on the clinical symptoms. During the first year the patients on active therapy had significantly fewer hay fever symptoms during the summer months compared with the placebo group. During the second study year, with all patients on active therapy, both groups had markedly milder symptoms compared with the placebo group. Side–effects were negligible. This study concludes that oral immunotherapy with grass-maize pollen extract in grass pollen-sensitive seasonal hay fever patients is safe and effective.     

山梨醇铁口服制剂生物利用度的研究

通过贫血大鼠模型血红蛋白恢复效应,研究了山梨醇铁片剂与口服液的相对生物利用度。实验结果表明,山梨醇铁片剂和口服液可分别使贫血大鼠血红蛋白提升4.86％和4.48％,相对生物利用度分别为103.6％和109％。临床初步应用表明,本品口服吸收良好,患者血红蛋白明显上升。     

磷酸镁骨粘合剂粘接骨折的实验研究

目的 探讨磷酸镁骨粘合剂（magnesium phosphate cement,MPC）粘接固定骨折的治疗效果。方法实验分为体外及体内两部分。体外部分：取54对新鲜猪股骨头标本,制备1cm^2骨折断面,随机分为6组,每组9对。分别用MPC粘接,在室温25℃和37℃、100％湿度两种不同条件下粘合固化30min,2、24h,行抗拉强度测试。体内部分：健康新西兰大白兔24只,通过开放截骨法制备兔双侧胫骨平台骨折模型。随机选取一侧为实验侧,采用MPC粘接;另一侧为对照侧,采用L形钢板内固定,术后均不作外固定。于术后3d,3、6和9周行X线片、周围血电解质、大体观察及组织学观察。结果体外部分：猪股骨头粘接体于两种不同条件下固化相同时间后其平均抗拉强度比较,差异无统计学意义（P〉0．05）。体内部分：X线片可见实验侧和对照侧骨折均于术后9周愈合,MPC随骨折愈合而逐渐被吸收。术后不同时间点周围血钙、镁浓度与术前比较,差异无统计学意义（P〉0．05）;磷浓度术后6周出现一过性升高,与术前比较差异有统计学意义（P〈0．05）。大体观察：术后3d,实验侧和对照侧均可见骨折块复位良好;3周,实验侧骨折处有部分MPC残留,对照侧可见部分骨折线;6周,实验侧骨折线消失,对照侧周围瘢痕组织和骨痂出现过度增生;9周,实验侧骨折处塑形良好,对照侧可见钢板遗留痕迹。组织学观察：实验侧术后3d,MPC与骨间界面清晰;3周,MPC开始降解,骨小梁长入其中;6周骨折愈合,仅少量MPC未吸收;9周MPC骨折愈合良好,MPC全部吸收。结论MPC的粘接强度高、能降解、对体内电解质离子浓度干扰小,是一种较为理想的骨粘合剂,可用于骨折的粘接固定。