Clinical experience with transfusion of leukocyte-poor platelet concentrates prepared by filtration with prostacyclin

Repeated transfusions with platelets from randomly selected donors lead to HLA alloimmunization in about 50% of patients due to lymphocyte contamination of platelet concentrates. Attempts to remove the leukocytes from the platelet concentrates by additional centrifugation steps led to substantial loss of platelets. We report a new procedure for removal of almost all leukocytes with excellent platelet recoveries. Single donor concentrates are treated with 50 ng/mL prostacyclin to inactivate the platelets transiently. The concentrates are then passed through a cellulose-acetate filter to remove the leukocytes. In 30 concentrates this treatment reduced the contamination by leukocytes to less than 0.1 million per concentrate with a platelet recovery of 89% +/- 1% (mean +/- SEM). Thirty filtered platelet concentrates transfused to ten thrombocytopenic patients within one hour after filtration were well tolerated and led to corrected count increments of (22.0 +/- 1.1) X 10(6)/mL blood after one hour and normal survival thereafter. In four of five patients these concentrates reduced the bleeding time. We conclude that transient inactivation of platelets by prostacyclin enables optimal removal of leukocytes and may help to reduce alloimmunization during frequent transfusions with platelet concentrates.     

聚焦超声波治疗女性外阴炎性疾病的疗效

目的探讨高强度聚焦超声治疗（HIFU）女性外阴炎性疾病（单纯外阴瘙痒症和外阴上皮内非瘤样病变）的疗效。方法应用高强度超声治疗仪对142例单纯外阴瘙痒症、267例不同病理类型外阴上皮内非瘤样病变（141例硬化苔藓和126例鳞状上皮细胞增生）,规范了对不同疾病的治疗方法以及疗效判别标准。结果本方法对单纯外阴瘙痒症组两次治疗后总有效率为90.4%;对外阴上皮内非瘤样病变4次治疗后,病变区皮肤面积由（14.26±4.79）cm2减少至（3.83±2.04）cm2,差异有统计学意义（P〈0.01）,其中对硬化苔藓型明显有效率为94.8%,对鳞状上皮细胞增生型患者明显有效率为92.0%。结论本组显示HIFU可使瘙痒症状显著减轻,外阴白色病变面积逐渐减少,并具有简便、无痛和安全无创等优点。     

室间隔完整型肺动脉闭锁的右心室减压策略

目的 总结室间隔完整型肺动脉闭锁(PA/IVS)右心室减压的经验与教训,反思右心室减压策略.方法 回顾性分析2015年3月至2019年12月于我院行右心室减压手术的12例PA/IVS患儿的临床资料,其中男10例、女2例,手术时中位年龄5(1～627)d.对减压后肺动脉瓣跨瓣压差与三尖瓣Z值变化进行相关性分析.结果 术后...     

Der p2重组BCG对哮喘小鼠气道炎症的抑制作用

目的：观察胞壁型屋尘螨抗原Derp2重组卡介苗（Derp2rBCG）对哮喘小鼠气道炎症的抑制作用.方法：实验分4组,小鼠分别给予生理盐水、BCG或Derp2rBCG处理,然后以Derp2为变应原建立哮喘模型,正常对照组给予生理盐水致敏及气道内滴入,取肺泡灌洗液、肺组织标本,观察肺部炎症细胞浸润、气道杯状细胞增殖及肥大细胞脱颗粒情况.结果：①Derp2rBCG下调了哮喘小鼠气道局部炎症;②Derp2rBCG减轻了哮喘小鼠肺组织中的炎症细胞浸润;③Derp2rBCG可以减轻哮喘小鼠气道粘液高分泌现象并下调杯状细胞数量;④Derp2rBCG减轻了哮喘小鼠气道中的肥大细胞脱颗粒现象.结论：Derp2rBCG是一种有效的哮喘免疫治疗方法.     

第五代泪道内镜微钻疏通联合人工鼻泪管置入治疗鼻泪管阻塞的临床观察

目的 探讨第五代泪道内窥镜下泪道疏通联合人工鼻泪管置入治疗鼻泪管阻塞的临床疗效。 方法 选取2014年1月至2015年12月诊治的61例(61眼)鼻泪管阻塞患者为研究对象,采用泪道内窥镜下微钻疏通联合人工鼻泪管置入术治疗。 结果 随访观察6个月,治愈48例(48眼),好转8例(8眼),有效率91.8%,无效5例(5眼)。 结论 第五代泪道内窥镜下微钻疏通联合人工鼻泪管植入治疗鼻泪管阻塞安全、有效,创伤小,并发症少。